The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) is announcing availability of Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) and Integrated Multi-satellitE Retrievals for Global Precipitation Measurement (IMERG) precipitation products in netCDF-4. The upgrades encompass the following datasets:
- TMPA Research Quality Daily, TRMM_3B42_DAILY
- TMPA Near Real-Time (TMPA-RT) Daily, TRMM_3B42RT_Daily
- TMPA Near Real-Time (TMPA-RT) 3-hourly, TRMM_3B42RT
- IMERG Final Run Daily, GPM_3IMERGDF
- IMERG Late Run Daily, GPM_3IMERGDL
- IMERG Early Run Daily, GPM_3IMERGDE
(GPM - Global Precipitation Measurement)
The older binary 3B42 Near Real-Time data sets, 3-Hourly and Daily, are currently not monitored operationally at the GES DISC, and will be decommissioned by the end of June 2016. While the binary data sets are fully replaced in netCDF-4, the binary and ASCII text format are still available by means of on-the-fly format conversion using OPeNDAP (see the data access page links below).
netCDF-4 offers numerous advantages, the most notable being:
+ It is a self-explanatory, machine-independent format;
+ It allows substantial compression rates that are seamless to users, allowing for much faster data downloads;
+ Data can be plotted without downloading, using user-friendly tools like Panoply; and
+ Since Daily precipitation files from TMPA and IMERG are now available in almost identical formats, side-by-side analyses become easier than ever (Figure 1).
Data access and other information can be acquired from:
http://disc.sci.gsfc.nasa.gov/uui/datasets?keywords="IMERG" and "Daily"
http://disc.sci.gsfc.nasa.gov/uui/datasets?keywords="TMPA" and "Daily"
Figure 1. Screenshot of a Panoply remote session, with side-by-side views of Daily TMPA Research Quality data and IMERG Final Run data.
Questions or comments? Email the NASA GES DISC Help Desk: email@example.com,