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You are here: GES DISC Home Precipitation Documentation TRMM_README TRMM Level 3 Monthly 5° x 5° and .5° x .5° Spaceborne Radar Rainfall (3A25)

TRMM Level 3 Monthly 5° x 5° and .5° x .5° Spaceborne Radar Rainfall (3A25)

Data Access for

3A25: http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?tree=project&dataset=3A25%20%28Version%20007%29:%20Monthly%205x5%20degree%20and%20.5x.5%20degree%20Spaceborne%20Radar%20Rainfall&project=TRMM&dataGroup=Gridded&version=007

Contents:

Summary

3A25, "PR Rainfall", computes monthly statistics of the PR measurements at both a low horizontal resolution (5 x 5 deg latitude/longitude) and a high horizontal resolution (0.5 x 0.5 deg latitude/longitude). The low resolution grids are in the Planetary Grid 1 structure and include 1) mean and standard deviation of the rain rate, reflectivity, path-integrated attenuation (PIA), storm height, Xi, bright band height and the NUBF (Non-Uniform Beam Filling) correction; 2) rain fractions; 3) histograms of the storm height, bright-band height, snow-ice layer, reflectivity, rain rate, path-attenuation and NUBF correction; 4) correlation coeffecients. For the high resolution grids in the Planetary Grid 2 structure, mean rain rate along with standard deviation and rain fractions are computed. The
following sections describe the structure and contents of the format.


Data Flow Description

The data flow of 3A25 can be found in Satellite Algorithm Flow Diagram.

Data Set Description

Data Characteristics

Temporal Coverage Start Date: 1998-01-01; Stop Date: -
Geographic Coverage Latitude: 40°S - 40°N; Longitude:180°W - 180°E
Temporal Resolution Monthly
Horizontal Resolution 5° x 5° and 0.5° x 0.5°
Average File Size Compressed: ~38 MB 
File Type HDF


Data Format Structure The following table summarizes the contents and structure of the PR monthly radar rainfall (3A25) product. The dimension sizes are defined by Dimension Size Table. Further information can be found in: File Specifications for TRMM Products - Version 7.00

Data Format Structure for 3A25, PR Monthly Radar Rainfall
Name Type Record Size (byte) Dim Size (# of Records) Scaled by Range Unit Description
ECS Core Metadata Char Attribute 10,000  - - - - ECS Core Metadata
PS Metadata Char Attribute 10,000  - - - - Product Specific Metadata
GridStructure Char Attribute 5,000  - - - - GridStructure gives the specification of the geometry of the grids.
Rain Rate Mean 1 Float SDS nlat*nlon*nh1 - 0.0 to 3000.0 mm h-1 Monthly means of non-zero rain rates over 5° x 5° boxes
Rain Rates Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 3000.0 mm h-1 Monthly standard deviations of non-zero rain rates over 5° x 5° boxes
Conv. Rain Rate Mean 1 Float SDS nlat*nlon*nh1 - 0.0 to 3000.0 mm h-1 Monthly means of non-zero rain rates for convective rain over 5° x 5° boxes
Conv. Rain Rates Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 3000.0 mm h-1 Monthly standard deviations of non-zero rain rates for convective rain over 5° x 5° boxes
Strat. Rain Rates Mean 1 Float SDS nlat*nlon*nh1 - 0.0 to 3000.0 mm h-1 Monthly means of non-zero rain rates for stratiform rain over 5° x 5° boxes
Strat. Rain Rates Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 3000.0 mm h-1 Monthly standard deviations of non-zero rain rates for stratiform rain over 5° x 5° boxes
Zm Mean 1 Float SDS nlat*nlon*nh1 - 0.0 to 100.0 dBZ Monthly means of measured radar reflectivity at the fixed heights of 2, 4, 6, 10 and 15 km and for path-average over 5° x 5° boxes using data from 1C-21
Zm Dev.1 Float SDS nlat*nlon*nh1 - 0.0 to 100.0 dBZ Monthly standard deviations of measured radar reflectivity at the fixed heights of 2, 4, 6, 10 and 15 km and for path-average over 5° x 5° boxes using data from 1C-21
Conv. Zm Mean 1 Float SDS nlat*nlon*nh1 - 0.0 to 100.0 dBZ Monthly means of measured radar reflectivity for convective rain at a horizontal resolution of 5° x 5°. The path-averaged mean and means at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 1C-21.
Conv. Zm Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 100.0 dBZ Monthly standard deviations of measured radar reflectivity for convective rain at a horizontal resolution of 5° x 5°. The path-averaged standard deviation and those at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 1C-21.
Strat. Zm Mean 1 Float SDS nlat*nlon*nh1 - 0.0 to 100.0 dBZ Monthly means of measured radar reflectivity for stratiform rain at a horizontal resolution of 5° x 5°. The path-averaged mean and means at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 1C-21.
Strat. Zm Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 100.0 dBZ Monthly standard deviations of measured radar reflectivity for stratiform rain at a horizontal resolution of 5° x 5°. The path-averaged standard deviation and those at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 1C-21.
Zt Mean 1 Float SDS nlat*nlon*nh1 - 0.0 to 80.0 dBZ Monthly means of corrected radar reflectivity factors at the fixed heights of 2, 4, 6, 10 and 15 km and for path-average over 5° x 5° boxes for one month using data from 2A-25
Zt Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 80.0 dBZ Monthly standard deviations of corrected radar reflectivity factors at the fixed heights of 2, 4, 6, 1 0 and 15 km and for path-average over 5° x 5° boxes using data from 2A-25
Conv. Zt Mean 1 Float SDS nlat*nlon*nh1 - 0.1 to 80.0 dBZ Monthly means of corrected radar reflectivity for convective rain at a horizontal resolution of 5° x 5°. The path-averaged mean and means at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 2A-25.
Conv. Zt Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 80.0 dBZ Monthly standard deviations of corrected radar reflectivity for convective rain at a horizontal resolution of 5° x 5°. The path-averaged standard deviation and those at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 2A-25.
Strat. Zt Mean 1 Float SDS nlat*nlon*nh1 - 0.1 to 80.0 dBZ Monthly means of measured radar reflectivity for stratiform rain at a horizontal resolution of 5° x 5°. The path-averaged mean and means at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 2A-25.
Strat. Zt Dev. 1 Float SDS nlat*nlon*nh1 - 0.0 to 80.0 dBZ Monthly standard deviations of corrected radar reflectivity for stratiform rain at a horizontal resolution of 5° x 5°. The path-averaged standard deviation and those at the fixed heights of 2, 4, 6, 10 and 15 km are calculated using data from 2A-25.
PIA srt Mean Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly means of SRT (surface reference technique) path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5° x 5°.
PIA srt Dev. Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly standard deviation of SRT path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5° x 5°.
PIA hb Mean Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly means of HB path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5° x 5°.
PIA hb Dev. Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly standard deviation of HB path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5° x 5°.
PIA 0th Mean Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly means of the 0th-order path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5° x 5°.
PIA 0th Dev. Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly standard deviation of the 0th-order path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5 x 5.
pia2a25Mean Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly means of 2A25 path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5° x 5°.
pia2a25Dev. Float SDS nlat*nlon*nang - 0.0 to 100.0 dB Monthly standard deviation of 2A25 path-integrated attenuation calculated at four fixed incidence angles. It has a horizontal resolution of 5° x 5°.
piaSrtssMean Float SDS nlat*nlon - 0.0 to 100.0 dB Mean of PIA (path-integrated attenuation, one-way) for SRT for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
piaSrtssDev Float SDS nlat*nlon - 0.0 to 100.0 dB Standard deviation of PIA (path-integrated attenuation, one-way) for SRT for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
piaHbssMean Float SDS nlat*nlon - 0.0 to 100.0 dB Mean of PIA (path-integrated attenuation, one-way) for HB method for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
piaHbssDev Float SDS nlat*nlon - 0.0 to 100.0 dB Standard deviation of PIA (path-integrated attenuation, one-way) for HB method for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
pia0ssMean Float SDS nlat*nlon - 0.0 to 100.0 dB Mean of PIA (path-integrated attenuation, one-way) for 0th-order method for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
pia0ssMean Float SDS nlat*nlon - 0.0 to 100.0 dB Standard deviation of PIA (path-integrated attenuation, one-way) for 0th-order method for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
pia2a25ssMean Float SDS nlat*nlon - 0.0 to 100.0 dB Mean of final PIA (path-integrated attenuation, one-way) from 2A25 for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
pia2a25ssDev Float SDS nlat*nlon - 0.0 to 100.0 dB Standard deviation of final PIA (path-integrated attenuation, one-way) from 2A25 for a sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide). It has a horizontal resolution of 5° x 5°.
Storm Height Mean Float SDS nlat*nlon*3 - 0.0 to 20,000.0 m Monthly mean of the storm height for conditions of stratiform rain, convective rain and unconditional rain
Storm Height Dev. Float SDS nlat*nlon*3 - 0.0 to 20,000.0 m Standard deviation of the storm height for conditions of stratiform rain, convective rain and unconditional rain
Xi Mean Float SDS nlat*nlon - 0.0 to 99.0 - Monthly means of the horizontal non-uniformity parameter of the rain field within a ray at a horizontal resolution of 5° x 5°
Xi Dev. Float SDS nlat*nlon - 0.0 to 99.0 - Monthly standard deviation of the horizontal non-uniformity parameter of the rain field within a ray at a horizontal resolution of 5° x 5°
NUBF Correction Factor Mean Float SDS nlat*nlon - 0.0 to 2.0 - Monthly mean of NUBF correction for Z-factor and Rain Rate at a horizontal resolution of 5° x 5°
NUBF Correction Factor Dev. Float SDS nlat*nlon - 0.0 to 2.0 - Monthly standard deviation of the NUBF correction for Z-factor and Rain Rate at a horizontal resolution of 5° x 5°
BB Height Mean Float SDS nlat*nlon - 0.0 to 20,000 m Monthly means of the bright band height at a horizontal resolution of 5° x 5°
BB Height Dev. Float SDS nlat*nlon - 0.0 to 20,000 m Monthly deviation of the bright band height at a horizontal resolution of 5° x 5°
bbNadirHtMean1 Float SDS nlat*nlon - 0.0 to 20,000 m Height of bright band from nadir ray at a horizontal resolution of 5° x 5°
bbNadirHtDev1 Float SDS nlat*nlon - 0.0 to 20,000 m Standard deviation of bright band from nadir ray at a horizontal resolution of 5° x 5°
bbNadirWidthMean1 Float SDS nlat*nlon - 0.0 to 10,000 m Width of bright band from nadir ray at a horizontal resolution of 5° x 5°
bbNadirWidthDev1 Float SDS nlat*nlon - 0.0 to 10,000 m Standard deviation of bright band from nadir ray at a horizontal resolution of 5° x 5°
bbNadirZmaxMean1 Float SDS nlat*nlon - 0.0 to 70.0 dBZ Mean of maximum Z in bright band from nadir ray at a horizontal resolution of 5° x 5°
bbNadirZmaxDev1 Float SDS nlat*nlon - 0.0 to 70.0 dBZ Standard deviation of maximum Z in bright band from nadir ray at a horizontal resolution of 5° x 5°
epsilonConvMean1 Float SDS nlat*nlon - 0.0 to 5.0 - Mean of epsilon conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
epsilonConvDev1 Float SDS nlat*nlon - 0.0 to 5.0 - Standard deviation of epsilon conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
epsilonStratMean1 Float SDS nlat*nlon - 0.0 to 5.0 - Mean of epsilon conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
epsilonStratDev1 Float SDS nlat*nlon - 0.0 to 5.0 - Standard deviation of epsilon conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
epsilon0ConvMean1 Float SDS nlat*nlon - 0.0 to 5.0 - Mean of epsilon0 conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
epsilon0ConvDev1 Float SDS nlat*nlon - 0.0 to 5.0 - Standard deviation of epsilon0 conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
epsilon0StratMean1 Float SDS nlat*nlon - 0.0 to 5.0 - Mean of epsilon0 conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
epsilon0StratDev1 Float SDS nlat*nlon - 0.0 to 5.0 - Standard deviation of epsilon0 conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 5° x 5°
surfRainMean1 Float SDS nlat*nlon - 0.0 to 3000.0 mm h-1 Mean of non-zero near-surface rain rate at a horizontal resolution of 5° x 5°
surfRainDev1 Float SDS nlat*nlon - 0.0 to 3000.0 mm h-1 Standard deviation of non-zero near-surface rain rate at a horizontal resolution of 5° x 5°
surfRainConvMean1 Float SDS nlat*nlon - 0.0 to 3000.0 mm h-1 Mean of non-zero near-surface rain rate conditioned on convective rain at a horizontal resolution of 5° x 5°
surfRainConvDev1 Float SDS nlat*nlon - 0.0 to 3000.0 mm h-1 Standard deviation of non-zero near-surface rain rate conditioned on convective rain at a horizontal resolution of 5° x 5°
surfRainStratMean1 Float SDS nlat*nlon - 0.0 to 3000.0 mm h-1 Mean of non-zero near-surface rain rate conditioned on stratiform rain at a horizontal resolution of 5° x 5°
surfRainStratDev1 Float SDS nlat*nlon - 0.0 to 3000.0 mm h-1 Standard deviation of non-zero near-surface rain rate conditioned on stratiform rain at a horizontal resolution of 5° x 5°
bbZmaxMean1 Float SDS nlat*nlon - 0.0 to 100.0 dBZ Mean of maximum reflectivity in bright band at a horizontal resolution of 5° x 5°
bbZmaxDev1 Float SDS nlat*nlon - 0.0 to 100.0 dBZ Standard Deviation of maximum reflectivity in bright band at a horizontal resolution of 5° x 5°
sdepthMean1 Float SDS nlat*nlon - 0.0 to 20,000.0 m Mean of snow depth at a horizontal resolution of 5° x 5°
sdepthDev1 Float SDS nlat*nlon - 0.0 to 20,000.0 m Standard deviation of snow depth at a horizontal resolution of 5° x 5°
e_surfRainMean1 Float SDS nlat*nlon - 0.0 to 400.0 mm h-1 Mean of non-zero estimated surface rain below clutter (See 2A25 algorithm user guide) at a horizontal resolution of 5° x 5°
e_surfRainDev1 Float SDS nlat*nlon - 0.0 to 400.0 mm h-1 Standard deviation of non-zero estimated surface rain below clutter (See 2A25 algorithm user guide) at a horizontal resolution of 5° x 5°
e_surfRainConvMean1 Float SDS nlat*nlon - 0.0 to 400.0 mm h-1 Mean of non-zero estimated surface rain below clutter (See 2A25 algorithm user guide) conditioned on convective rain at a horizontal resolution of 5° x 5°
e_surfRainConvDev1 Float SDS nlat*nlon - 0.0 to 400.0 mm h-1 Standard deviation of non-zero estimated surface rain below clutter (See 2A25 algorithm user guide) conditioned on convective rain at a horizontal resolution of 5° x 5°
e_surfRainStratMean1 Float SDS nlat*nlon - 0.0 to 400.0 mm h-1 Mean of non-zero estimated surface rain below clutter (See 2A25 algorithm user guide) conditioned on stratiform rain at a horizontal resolution of 5° x 5°
e_surfRainDev1 Float SDS nlat*nlon - 0.0 to 400.0 mm h-1 Standard deviation of non-zero estimated surface rain below clutter (See 2A25 algorithm user guide) conditioned on stratiform rain at a horizontal resolution of 5° x 5°
rzA1 Float SDS nlat*nlon*2 - 0.0 to 1.0 mm h-1 The A parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs. Computed for near-surface and 2km, at a horizontal resolution of 5° x 5°
rzB1 Float SDS nlat*nlon*2 - 0.0 to 1.0 mm h-1 The B parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs. Computed for near-surface and 2km, at a horizontal resolution of 5° x 5°
rzConvA1 Float SDS nlat*nlon*2 - 0.0 to 1.0 mm h-1 The A parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on convective rain. Computed for near-surface and 2km, at a horizontal resolution of 5° x 5°
rzConvB1 Float SDS nlat*nlon*2 - 0.0 to 1.0 mm h-1 The B parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on convective rain. Computed for near-surface and 2km, at a horizontal resolution of 5° x 5°
rzStratA1 Float SDS nlat*nlon*2 - 0.0 to 1.0 mm h-1 The A parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on stratiform rain. Computed for near-surface and 2km, at a horizontal resolution of 5° x 5°
rzStratB1 Float SDS nlat*nlon*2 - 0.0 to 1.0 mm h-1 The B parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on stratiform rain. Computed for near-surface and 2km, at a horizontal resolution of 5° x 5°
Total Pixel Number 1 Integer SDS nlat*nlon - 0 to 2,000,000 - The number of total pixels over 5° x 5° boxes for one month
Bright Band Pixel Number 1 Integer SDS nlat*nlon - 0 to 2,000,000 - The number of bright band counts over each 5° x 5° box for one month
bbNadirPix1 Integer SDS nlat*nlon - 0 to 2,000,000 - The number of bright band nadir pixel counts over each 5° x 5° box
Rain Pixel Number 1 Integer SDS nlat*nlon*nh1 - 0 to 2,000,000 - The number of non-zero rain rate pixels at the fixed heights of 2, 4, 6, 10 and 15 km and for path-average over 5° x 5° boxes for one month
Conv. Rain Pixel Number 1 Integer SDS nlat*nlon*nh1 - 0 to 2,000,000 - The number of non-zero rain rate pixels for convective rain at the fixed heights of 2, 4, 6, 10 and 15 km and for path-average over 5° x 5° boxes for one month
Strat. Rain Pixel Number 1 Integer SDS nlat*nlon*nh1 - 0 to 2,000,000 - The Stratiform Rain Pixel Number 1 is the number of non-zero rain rate pixels for stratiform rain at the fixed heights of 2, 4, 6, 10 and 15 km and for path-average over 5° x 5° boxes for one month.
Total Angle Pixel Number 1 Integer SDS nlat*nlon*nang - 0 to 30,000 - Total Angle Pixel Number 1 is the total number of pixels over each 5° x 5° latitude-longitude grid box for a month. This parameter is accumulated at four different angles (i.e., 0, 5, 10, and 15).
Rain Angle Pixel Number 1 Integer SDS nlat*nlon*nang - 0 to 30,000 - Rain Angle Pixel Number 1 is the total number of non-zero rain rate pixels over each 5° x 5° latitude-longitude grid box for a month. This parameter is accumulated at four different angles (i.e., 0, 5, 10, and 15).
surfRainPix1 Integer SDS nlat*nlon - 0 to 2,000,000 - Near-surface rain counts at a horizontal resolution of 5° x 5°
surfRainConvPix1 Integer SDS nlat*nlon - 0 to 32,767 - Counts of Near-surface rain fall conditioned on convective rain at a horizontal resolution of 5° x 5°
surfRainStratPix1 Integer SDS nlat*nlon - 0 to 32,767 - Counts of Near-surface rain fall conditioned on stratiform rain at a horizontal resolution of 5° x 5°
e_surfRainPix1 Integer SDS nlat*nlon - 0 to 2,000,000 - The number of non-zero estimated surface rain pixel counts at a horizontal resolution of 5° x 5°
e_surfRainConvPix1 Integer SDS nlat*nlon - 0 to 2,000,000 - The number of non-zero estimated surface rain pixel counts conditioned on convective rain, at a horizontal resolution of 5° x 5°
e_surfRainStratPix1 Integer SDS nlat*nlon - 0 to 2,000,000 - The number of non-zero estimated surface rain pixel counts conditioned on stratiform rain, at a horizontal resolution of 5° x 5°
rzPix1 Integer SDS nlat*nlon*2 - 0 to 2,000,000 - The number of R-Z coefficient pixel counts for near-surface and 2km heights, at a horizontal resolution of 5° x 5°
rzConvPix1 Integer SDS nlat*nlon*2 - 0 to 2,000,000 - The number of R-Z coefficient pixel counts for convective rain near-surface and 2km heights, at a horizontal resolution of 5° x 5°
rzStratPix1 Integer SDS nlat*nlon*2 - 0 to 2,000,000 - The number of R-Z coefficient pixel counts for stratiform rain near-surface and 2km heights, at a horizontal resolution of 5° x 5°
piaSrtssPix Integer SDS nlat*nlon - 0 to 32,767 - Counts of PIA using SRT method for sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide) at a horizontal resolution of 5° x 5°
piaHbssPix Integer SDS nlat*nlon - 0 to 32,767 - Counts of PIA using HB method for sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide) at a horizontal resolution of 5° x 5°
pia0ssPix Integer SDS nlat*nlon - 0 to 32,767 - Counts of PIA using 0th-order method for sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide) at a horizontal resolution of 5° x 5°
pia2a25ssPix Integer SDS nlat*nlon - 0 to 32,767 - Counts of final PIA from 2A25 for sub-set of data where the 2A25 method flag has been set (see 2A25/3A25 algorithm users guide) at a horizontal resolution of 5° x 5°
rainCCoefPix Integer SDS nlat*nlon*3 - 0 to 32,767 - Counts for correlation coefficients of rain at the 3 heights at a horizontal resolution of 5° x 5°
stratCCoefPix Integer SDS nlat*nlon*3 - 0 to 32,767 - Counts for correlation coefficients of rain conditioned on stratiform rain at the 3 heights at a horizontal resolution of 5° x 5°
convCCoefPix Integer SDS nlat*nlon*3 - 0 to 32,767 - Counts for correlation coefficients of rain conditioned on convective rain at the 3 heights at a horizontal resolution of 5° x 5°
epsilonConvPix1 Integer SDS nlat*nlon - 0 to 32,767 - Counts of epsilon conditioned on convective rain and use of 2A21 SRT at the 3 heights at a horizontal resolution of 5° x 5°
epsilonStratPix1 Integer SDS nlat*nlon - 0 to 32,767 - Counts of epsilon conditioned on stratiform rain and use of 2A21 SRT at the 3 heights at a horizontal resolution of 5° x 5°
epsilon0ConvPix1 Integer SDS nlat*nlon - 0 to 32,767 - Counts of epsilon0 conditioned on convective rain and use of 2A21 SRT at the 3 heights at a horizontal resolution of 5° x 5°
epsilon0StratPix1 Integer SDS nlat*nlon - 0 to 32,767 - Counts of epsilon0 conditioned on stratiform rain and use of 2A21 SRT at the 3 heights at a horizontal resolution of 5° x 5°
Storm Height Hist. Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - These are histograms of the 'effective' storm heights for 30 categories over a 5° x 5° box for one month.
Conv. Storm Height Hist. Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - These are histograms of the 'effective' storm heights for convective rain for 30 categories over a 5° x 5° box for one month.
Strat. Storm Height Hist. Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - These are histograms of the 'effective' storm heights for stratiform rain for 30 categories over a 5° x 5° box for one month.
BB Height Hist. Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - These are histograms of the bright-band heights for 30 categories over a 5 x 5 box for one month, given that the bright band is detected.
Snow-ice Layer Hist. Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - These are histograms of the depth of snow-ice layer for 30 categories over a 5° x 5° box for one month. The depth of snow-ice layer is defined as the difference between effective storm height and estimated height of 0C isotherm.
Zm Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - The Zm Histograms are histograms of measured reflectivities of rain pixels at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box i for one month.
Conv. Zm Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - The Convective Zm Histograms are histograms of measured reflectivities of convective rain pixels at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
Strat. Zm Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - The Stratiform Zm Histograms are histograms of measured reflectivities of stratiform rain pixels at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
Zt Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - The Zt Histograms are histograms of corrected reflectivity factors i for rain pixels at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
Conv. Zt Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - The Convective Zt Histograms are histograms of corrected reflectivity factors for convective rain pixels at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
Strat. Zt Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - The Stratiform Zt Histograms are histograms of corrected reflectivity factors for stratiform rain pixels at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
Rain Rate Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - These are histograms of non-zero rain rate pixels at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
Conv. Rain Rate Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - These are histograms of non-zero rain rate pixels for convective rain at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
Strat. Rain Rate Hist. Integer SDS nlat*nlon*ncat2*nh1 - 0 to 32,767 - These are histograms of non-zero rain rate pixels for stratiform rain at five heights (2, 4, 6, 10 and 15 km) and path-average for 20 categories over a 5° x 5° box for one month.
bbNadirHH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of bright band heights from nadir ray for 30 categories over a 5° x 5° box for one month.
bbNadirWidthH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of bright band width from nadir ray for 30 categories over a 5° x 5° box for one month.
bbNadirZmaxH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of maximum Z in bright band from nadir ray for 30 categories over a 5° x 5° box for one month.
e_surfRainH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of non-zero estimated surface rain for 30 categories over a 5° x 5° box for one month.
e_surfRainConvH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of non-zero estimated surface rain conditioned on convective rain for 30 categories over a 5° x 5° box for one month.
e_surfRainStratH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of non-zero estimated surface rain conditioned on stratiform rain for 30 categories over a 5° x 5° box for one month.
SurfRainConvH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of non-zero near-surface rainfall conditioned on convective rain for 30 categories over a 5° x 5° box for one month.
SurfRainStratH Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - Histogram in counts of non-zero near-surface rainfall conditioned on stratiform rain for 30 categories over a 5° x 5° box for one month.
piaSrtssH Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - Histogram in counts of PIA from SRT subsetted 2A25 method flag at 5 angles (0, 5, 10, 15, and all 49 angle bins) for 30 categories over a 5° x 5° box for one month.
piaHbssH Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - Histogram in counts of PIA from HB method subsetted 2A25 method flag at 5 angles (0, 5, 10, 15, and all 49 angle bins) for 30 categories over a 5° x 5° box for one month.
pia0ssH Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - Histogram in counts of PIA from 0th-order method subsetted 2A25 method flag at 5 angles (0, 5, 10, 15, and all 49 angle bins) for 30 categories over a 5° x 5° box for one month.
pia2a25ssH Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - Histogram in counts of final PIA from 2A25 subsetted 2A25 method flag at 5 angles (0, 5, 10, 15, and all 49 angle bins) for 30 categories over a 5° x 5° box for one month.
PIA srt Hist. Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - PIA srt Hist. gives histograms of path-attenuation as determined by the surface reference technique (SRT) at 4 incidence angles (0, 5, 10 and 15) for 30 categories over a 5° x 5° box for one month.
PIA hb Hist. Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - These are histograms of path-attenuation using an estimate derived from measured reflectivity (Zm) and a k-Z relationship at 4 incidence angles (0, 5, 10 and 15) for 30 categories over a 5° x 5° box for one month.
PIA 0th Hist. Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - PIA 0th Hist. is the histogram of the 0th order path-integrated attenuation with a horizontal resolution of 5° x 5°. This histogram is calculated for 30 categories at 4 different incident angles (0 , 5, 10 and 15).
pia2A25H Integer SDS nlat*nlon*ncat2*nang - 0 to 32,767 - These are histograms of path-attenuation as determined by 2A25 at 4 incidence angles (0, 5, 10 and 15) for 30 categories over a 5° x 5° box for one month.
Xi Hist. Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - The Xi Histograms is the histogram of non-uniformity parameter determined in 2A-25 for 30 categories over a 5° x 5° box for one month.
NUBF Hist. Integer SDS nlat*nlon*ncat2 - 0 to 32,767 - NUBF (Non-Uniform Beam Filling) Hist. gives the histogram of the NUBF correction for Z-factor and rain rate of 30 different categories over 5° x 5° grid boxes.
bbZmaxH Integer SDS nlat*nlon*ncat2 - 0 to 32,000 - Histogram of maximum Zt in bright band at a horizontal resolution of 5° x 5°
epsilonConvH Integer SDS nlat*nlon*ncat2 - 0 to 32,000 - Histogram of epsilon conditioned on convective rain and use 2A21 SRT at a horizontal resolution of 5° x 5°
epsilonStratH Integer SDS nlat*nlon*ncat2 - 0 to 32,000 - Histogram of epsilon conditioned on stratiform rain and use 2A21 SRT at a horizontal resolution of 5° x 5°
epsilon0ConvH Integer SDS nlat*nlon*ncat2 - 0 to 32,000 - Histogram of epsilon0 conditioned on convective rain and use 2A21 SRT at a horizontal resolution of 5° x 5°
epsilon0StratH Integer SDS nlat*nlon*ncat2 - 0 to 32,000 - Histogram of epsilon0 conditioned on stratiform rain and use 2A21 SRT at a horizontal resolution of 5° x 5°
surfRainH Integer SDS nlat*nlon*ncat2 - 0 to 32,000 - Histogram of near-surface rain rate at a horizontal resolution of 5 x 5
RR Corr. Coef. Float SDS nlat*nlon*3 - -1.000 to 1.000 - These are correlation coefficients of non-zero rain rates between 3 heights (i.e., correlation coefficient of rain rates at 2 km vs 4 km, 2 km vs 6 km, and 4 km vs 6 km) for a 5° x 5° box for one month. They are calculated under convective condition, stratiform condition or both.
Conv. RR Corr. Coef. Float SDS nlat*nlon*3 - -1.000 to 1.000 - These are correlation coefficients of non-zero rain rates for convective rain between 3 heights (i.e., correlation coefficient of rain rates at 2 km vs 4 km, 2 km vs 6 km, and 4 km vs 6 km ) for a 5° x 5° box for one month.
Strat. RR Corr. Coef. Float SDS nlat*nlon*3 - -1.000 to 1.000 - These are correlation coefficients of non-zero rain rates for stratiform rain between 3 heights (i.e., correlation coefficient of rain rates at 2 km vs 4 km, 2 km vs 6 km, and 4 km vs 6 km) for a 5° x 5° box for one month.
PIAs Corr. Coef. Float SDS nlat*nlon*nang*3 - -1.000 to 1.000 - This is the correlation coefficient of three path-integrated attenuations (SRT, HB, and 0th order PIAs) at angles of 0, 5, 10 and 15 for a 5° x 5° box for one month.
GridStructure Char Attribute 5,000  - - - - GridStructure gives the specification of the geometry of the grids.
Rain Rate Mean 2 Float SDS nlath*nlonh*nh3 - 0.0 to 3000.0 mm h-1 Rain Rate Mean 2 gives means of non-zero rain rates over 0.5° x 0.5° boxes for one month. The rain rates are determined in 2A-25 and evaluated at the fixed heights of 2 km, 4 km, 6 km, and path average.
Rain Rate Dev. 2 Float SDS nlath*nlonh*nh3 - 0.0 to 3000.0 mm h-1 Rain Rate Dev. 2 gives standard deviations of non-zero rain rates over 0.5 x 0.5 boxes for one month. The rain rates are determined in 2A-25 and evaluated at the fixed heights of 2 km, 4 km, 6 km, and path average.
Conv. Rain Rate Mean 2 Float SDS nlath*nlonh*nh3 - 0.0 to 3000.0 mm h-1 Conv. Rain Rate Mean 2 gives means of non-zero rain rates for convective rain over 0.5° x 0.5° boxes for one month. The rain rates are determined in 2A-25 and evaluated at the fixed heights of 2 km, 4 km, 6 km, and path average.
Conv. Rain Rate Dev. 2 Float SDS nlath*nlonh*nh3 - 0.0 to 3000.0 mm h-1 Conv. Rain Rate Dev. 2 gives standard deviations of non-zero rain rates for convective rain over 0.5° x 0.5° boxes for one month. The rain rates are determined in 2A-25 and evaluated at the fixed heights of 2 km, 4 km, 6 km, and path average.
Strat. Rain Rate Mean 2 Float SDS nlath*nlonh*nh3 - 0.0 to 3000.0 mm h-1 Strat. Rain Rate Mean 2 gives means of non-zero rain rates for stratiform rain over 0.5° x 0.5° boxes for one month. The rain rates are determined in 2A-25 and evaluated at the fixed heights of 2 km, 4 km, 6 km, and path average.
Strat. Rain Rate Dev. 2 Float SDS nlath*nlonh*nh3 - 0.0 to 3000.0 mm h-1 Strat. Rain Rate Dev. 2 gives standard deviations of non-zero rain rates for stratiform rain over 0.5° x 0.5° boxes for one month. The rain rates are determined in 2A-25 and evaluated at the Strat. Rain Rate Mean 2.
Zm Mean 2 Float SDS nlath*nlonh*nh3 - -20.0 to 80.0 dBZ Zm Mean 2 gives the monthly means of the measured reflectivity at the fixed height levels of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° grid boxes.
Conv. Zm Mean 2 Float SDS nlath*nlonh*nh3 - -20.0 to 80.0 dBZ Conv. Zm Mean 2 gives the monthly means of the measured reflectivity of convective rain at the fixed height levels of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° grid boxes.
Strat. Zm Mean 2 Float SDS nlath*nlonh*nh3 - -20.0 to 80.0 dBZ Strat. Zm Means gives the monthly means of the measured reflectivity of stratiform rain at the fixed heights of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° grid boxes.
Zt Mean 2 Float SDS nlath*nlonh*nh3 - 0.1 to 80.0 dBZ Zt Mean 2 gives the monthly means of the corrected reflectivity at the fixed heights of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° grid boxes.
Conv. Zm Mean 2 Float SDS nlath*nlonh*nh3 - 0.1 to 80.0 dBZ Conv. Zm Mean 2 gives the monthly means of the corrected reflectivity of convective rain at the fixed heights of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° grid boxes.
Strat. Zt Mean 2 Float SDS nlath*nlonh*nh3 - 0.1 to 80 dBZ Strat. Zm Means gives the monthly means of the corrected reflectivity of stratiform rain at the fixed heights of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° grid boxes.
Storm Height Mean Float SDS nlath*nlonh*2 - 0.0 to 20,000.0 m Storm Height Mean gives the monthly means of the storm height, unconditioned and conditioned for stratiform and convective rain over 0.5° x 0.5° grid boxes.
BB Height Mean Float SDS nlath*nlonh - 0.0 to 20,000.0 m BB Height Mean gives the monthly means of bright-band height over grid boxes of 0.5° x 0.5°
surfRainMean2 Float SDS nlath*nlonh - 0.0 to 3000.0 mm h-1 Mean of non-zero near-surface rain rate at a horizontal resolution of 0.5° x 0.5°
surfRainDev2 Float SDS nlath*nlonh - 0.0 to 3000.0 mm h-1 Standard Deviation of non-zero near-surface rain rate at a horizontal resolution of 0.5° x 0.5°
bbZmaxMean2 Float SDS nlath*nlonh - 0.0 to 100.0 dBZ Mean of maximum reflectivity in bright band at a horizontal resolution of 0.5° x 0.5°
bbZmaxDev2 Float SDS nlath*nlonh - 0.0 to 100 dBZ Mean of maximum reflectivity in bright band at a horizontal resolution of 0.5° x 0.5°
sdepthMean2 Float SDS nlath*nlonh - 0.0 to 20,000.0 m Mean of snow depth at a horizontal resolution of 0.5° x 0.5°
sdepthDev2 Float SDS nlath*nlonh - 0.0 to 20,000.0 m Standard deviation of snow depth at a horizontal resolution of 0.5° x 0.5°
stormHeightDev2 Float SDS nlath*nlonh*2 - 0.0 to 20,000.0 m Standard deviation of storm height at a horizontal resolution of 0.5° x 0.5°
bbHeightDev2 Float SDS nlath*nlonh - 0.0 to 20,000.0 m Standard deviation of bright band height at a horizontal resolution of 0.5° x 0.5°
epsilonConvMean2 Float SDS nlath*nlonh - 0.0 to 5.0 - Mean of epsilon conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
epsilonConvDev2 Float SDS nlath*nlonh - 0.0 to 5.0 - Standard deviation of epsilon conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
epsilonStratMean2 Float SDS nlath*nlonh - 0.0 to 5.0 - Mean of epsilon conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
epsilonStratDev2 Float SDS nlath*nlonh - 0.0 to 5.0 - Standard deviation of epsilon conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
epsilon0ConvMean2 Float SDS nlath*nlonh - 0.0 to 5.0 - Mean of epsilon0 conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
epsilon0ConvDev2 Float SDS nlath*nlonh - 0.0 to 5.0 - Standard deviation of epsilon0 conditioned on convective rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
epsilon0StratMean2 Float SDS nlath*nlonh - 0.0 to 5.0 - Mean of epsilon0 conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
epsilon0StratDev2 Float SDS nlath*nlonh - 0.0 to 5.0 - Standard deviation of epsilon0 conditioned on stratiform rain and use of 2A21 SRT at a horizontal resolution of 0.5° x 0.5°
shallowIsoRainMean2 Float SDS nlath*nlonh - 0.0 to 3,000.0 mm h-1 Mean of shallow isolated rain at a horizontal resolution of 0.5° x 0.5°
shallowIsoRaindev2 Float SDS nlath*nlonh - 0.0 to 3,000.0 mm h-1 Standard deviation of shallow isolated rain at a horizontal resolution of 0.5° x 0.5°
shallowRainMean2 Float SDS nlath*nlonh - 0.0 to 3,000.0 mm h-1 Mean of shallow rain at a horizontal resolution of 0.5° x 0.5°
shallowRaindev2 Float SDS nlath*nlonh - 0.0 to 3,000.0 mm h-1 Standard deviation of shallow rain at a horizontal resolution of 0.5° x 0.5°
e_surfRainMean2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Mean of non-zero estimated surface rain below clutter (see 2A25 algorithm user guide) at a horizontal resolution of 0.5° x 0.5°
e_surfRaindev2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Standard deviation of non-zero estimated surface rain below clutter (see 2A25 algorithm user guide) at a horizontal resolution of 0.5° x 0.5°
e_surfRainConvMean2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Mean of non-zero estimated surface rain below clutter (see 2A25 algorithm user guide) conditioned on convective rain at a horizontal resolution of 0.5° x 0.5°
e_surfRainConvdev2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Standard deviation of non-zero estimated surface rain below clutter (see 2A25 algorithm user guide) conditioned on convective rain at a horizontal resolution of 0.5° x 0.5°
e_surfRainStratMean2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Mean of non-zero estimated surface rain below clutter (see 2A25 algorithm user guide) conditioned on stratiform rain at a horizontal resolution of 0.5° x 0.5°
e_surfRainStratdev2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Standard deviation of non-zero estimated surface rain below clutter (see 2A25 algorithm user guide) conditioned on stratiform rain at a horizontal resolution of 0.5° x 0.5°
surfRainConvMean2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Mean of non-zero near-surface rain conditioned on convective rain at a horizontal resolution of 0.5° x 0.5°
surfRainConvDev2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Standard deviation of non-zero near-surface rain conditioned on convective rain at a horizontal resolution of 0.5° x 0.5°
surfRainStratMean2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Mean of non-zero near-surface rain conditioned on stratiform rain at a horizontal resolution of 0.5° x 0.5°
surfRainStratDev2 Float SDS nlath*nlonh - 0.0 to 400.0 mm h-1 Standard deviation of non-zero near-surface rain conditioned on stratiform rain at a horizontal resolution of 0.5° x 0.5°
rzA2 Float SDS nlath*nlonh*2 - 0.0 to 1.0 mm h-1 The A parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs. Computed for near-surface and 2km heights at a horizontal resolution of 0.5° x 0.5°
rzB2 Float SDS nlath*nlonh*2 - 0.0 to 1.0 mm h-1 The B parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs. Computed for near-surface and 2km heights at a horizontal resolution of 0.5° x 0.5°
rzConvA2 Float SDS nlath*nlonh*2 - 0.0 to 1.0 mm h-1 The A parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on convective rain. Computed for near-surface and 2km heights at a horizontal resolution of 0.5° x 0.5°
rzConvB2 Float SDS nlath*nlonh*2 - 0.0 to 1.0 mm h-1 The B parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on convective rain. Computed for near-surface and 2km heights at a horizontal resolution of 0.5° x 0.5°
rzStratA2 Float SDS nlath*nlonh*2 - 0.0 to 1.0 mm h-1 The A parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on stratiform rain. Computed for near-surface and 2km heights at a horizontal resolution of 0.5° x 0.5°
rzStratB2 Float SDS nlath*nlonh*2 - 0.0 to 1.0 mm h-1 The B parameter in rainfall-reflectivity relation R = AZ^B from fitting of instantaneous R, Z pairs conditioned on stratiform rain. Computed for near-surface and 2km heights at a horizontal resolution of 0.5° x 0.5°
Total Pixel Number 2 Integer SDS nlath*nlonh - 0 to 2,000,000 - The Total Pixel Number 2 is the number of total pixels over 0.5° x 0.5° boxes for one month.
Bright Band Pixel Number 2 Integer SDS nlath*nlonh - 0 to 2,000,000 - The number of bright band counts over each 0.5° x 0.5° box for one month
surfRainPix2 Integer SDS nlath*nlonh - 0 to 2,000,000,000. - Near-surface rain counts at a horizontal resolution of 0.5° x 0.5°
Rain Pixel Number 2 Integer SDS nlath*nlonh*nh3 - 0 to 2,000,000 - The Rain Pixel Number 2 is the monthly number of non-zero rain rate pixels for path-averaged rainfall and rainfall at the fixed heights of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° boxes.
Conv. Rain Pixel Number 2 Integer SDS nlath*nlonh*nh3 - 0 to 2,000,000 - The Convective Rain Pixel Number 2 is the number of non-zero rain rate pixels for convective rain at the fixed heights of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° boxes for one month.
Strat. Rain Pixel Number 2 Integer SDS nlath*nlonh*nh3 - 0 to 2,000,000 - The Stratiform Rain Pixel Number 2 is the number of non-zero rain rate pixels for stratiform rain at the fixed heights of 2 km, 4 km, 6 km, and path average over 0.5° x 0.5° boxes for one month.
epsilonConvPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of epsilon conditioned on convective rain and use of 2A21 SRT over 0.5° x 0.5° boxes for one month.
epsilonStratPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of epsilon conditioned on stratiform rain and use of 2A21 SRT over 0.5° x 0.5° boxes for one month.
epsilon0ConvPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of epsilon0 conditioned on convective rain and use of 2A21 SRT over 0.5° x 0.5° boxes for one month.
epsilon0StratPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of epsilon0 conditioned on stratiform rain and use of 2A21 SRT over 0.5° x 0.5° boxes for one month.
shallowIsoPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of shallow isolated rain over 0.5° x 0.5° boxes for one month.
shallowRainPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of shallow rain over 0.5° x 0.5° boxes for one month.
e_surfRainPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of non-zero estimated surface rain over 0.5° x 0.5° boxes for one month.
e_surfRainConvPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of non-zero estimated surface rain conditioned on convective rain over 0.5° x 0.5° boxes for one month.
e_surfRainStratPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of non-zero estimated surface rain conditioned on stratiform rain over 0.5° x 0.5° boxes for one month.
surfRainConvPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of non-zero near-surface rain conditioned on convective rain over 0.5° x 0.5° boxes for one month.
surfRainStratPix2 Integer SDS nlath*nlonh - 0 to 2,000,000 - Counts of non-zero near-surface rain conditioned on stratiform rain over 0.5° x 0.5° boxes for one month.
rzPix2 Integer SDS nlath*nlonh*2 - 0 to 2,000,000 - The number of R-Z coefficient pixel counts for near-surface and 2km heights over 0.5° x 0.5° boxes for one month.
rzConvPix2 Integer SDS nlath*nlonh*2 - 0 to 2,000,000 - The number of R-Z coefficient pixel counts conditioned on convective rain for near-surface and 2km heights over 0.5° x 0.5° boxes for one month.
rzStratPix2 Integer SDS nlath*nlonh*2 - 0 to 2,000,000 - The number of R-Z coefficient pixel counts conditioned on stratiform rain for near-surface and 2km heights over 0.5° x 0.5° boxes for one month.
Note:   Missing data are given the value of -9999.

Dimension Size Table:

Name Value Definition
nlat 16  the number of 5° grid intervals of latitude from 40° S to 40° N
nlon 72  the number of 5° grid intervals of longitude from 180° W to 180° E
nlath 148  the number of 0.5° grid intervals of latitude from 37° S to 37° N
nlonh 720  the number of 0.5° grid intervals of longitude from 180° W to 180° E
nh1 the number of fixed heights above the earth ellipsoid, at 2, 4, 6, 10, and 15 km plus one for path-average, in that order
nh3 the number of fixed heights above the earth ellipsoid, at 2, 4, 6 km plus one for path-average, in that order
nang Number of xed incidence angles, at 0, 5, 10 and 15 degree.
ncat2 30  the second number of categories for histograms



TRMM 3A25 can be accessed and ordered from Mirador,

http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?tree=project&dataset=3A25%20%28Version%20007%29:%20Monthly%205x5%20degree%20and%20.5x.5%20degree%20Spaceborne%20Radar%20Rainfall&project=TRMM&dataGroup=Gridded&version=007

For more details about the file structure, File Specifications for TRMM Products - Version 7.00


Appendix

 
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