AIRS HSB Level 1B data sample product
The HSB level 1B data set contains HSB calibrated and geolocated brightness temperatures in degrees Kelvin. This data set is generated from HSB Level 1A digital numbers (DN), including 4 microwave channels in the 150 - 190 GHz region of the spectrum. A day's worth of data is divided into 240 scenes each of 6 minute duration. For the HSB measurements, an individual scene consists of 135 scanlines containing 90 cross-track footprints; thus there is a total of 135 x 90 = 12,150 footprints per HSB scene, which coincide very closely with the AIRS infrared footprints.
HSB is primarily a humidity sounder that provides information on snow/ice cover and precipitation using the 150 GHz window channel, and the coarse distribution of moisture in the troposphere using the 183 GHz channels. Combined with simultaneous measurements from the AIRS and AMSU-A instruments, the calibrated HSB brightness temperatures will be used to initialize the atmospheric moisture profile required for the retrieval of the final AIRS geophysical products. HSB level 1B daily summary browse product is also available to provide users with a global quick look capability when searching for data of interest.
GES DISC Data Access
Global, Twice Daily
(Daytime and Nighttime)
13.5 km FOV at nadir
Channel 2 150.0 GHz
Channel 3 183.31 ± 1.0 GHz
Channel 4 183.31 ± 3.0 GHz
Channel 5 183.31 ± 7.0 GHz
HSB failed after 2003-02-05.
1.7 MB/file, 240 files/day
AIRS User Guide
HSB Instrument Guide
To plot HSB brightness temperatures on satellite projection:
(can save the image as well)
idl -novm -rt=airs1b_look.sav –args filename channel_number(option)
0.0.0.G07090194232.hdf 2 default channel=1 (89.0 GHz)
hsbFrequency = [89.0, 150.0, 183.31,
183.31, 183.31] GHz