AMSR/ADEOS-II L1A Raw Observation Counts, Version 2

Data set id:

AMSR-L1A

DOI: 10.5067/ADEOS-II/AMSR/AMSR-L1A.002

Data Citation and Acknowledgment
As a condition of using these data, you must cite the use of this data set. Such a practice gives credit to data set producers and advances principles of transparency and reproducibility.

10.5067/ADEOS-II/AMSR/AMSR-L1A.002

Japan Aerospace Exploration Agency (JAXA). (2007). AMSR/ADEOS-II L1A Raw Observation Counts. (AMSR-L1A, Version 2). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/ADEOS-II/AMSR/AMSR-L1A.002. [describe subset used if applicable]. Date Accessed 11-21-2024.

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Version Summary

This improved algorithm features empirical corrections to the ADEOS-II scan azimuth and satellite flight direction. With corrected sun azimuth, sun elevation, earth azimuth, and earth incidence angles, the geometric accuracy of AMSR 89 GHz data improved to within 2 km, compared to Version 1 AMSR-L1A data.

Overview

The Advanced Microwave Scanning Radiometer (AMSR) instrument on the Japan Aerospace Exploration Agency's (JAXA) Advanced Earth Observing Satellite-II (ADEOS-II) provided global passive microwave measurements of land, ocean, and atmospheric variables for the investigation of global water and energy cycles. The AMSR/ADEOS-II L1A Raw Observation Counts (AMSR-L1A) data set was processed from Level 0 science packet data by the JAXA Earth Observation Center (EOC) in Japan. Each half-orbit data granule consists of observation counts, antenna temperature coefficients, offsets for calculating antenna temperatures, calibration temperature counts, land/ocean flags, time, latitude, longitude, and navigation fields in Hierarchical Data Format (HDF). AMSR is a conical scan sensor that sweeps the surface of the Earth at about ±90 degrees centered at the direction of the satellite flight. The swath width is about 1600 km. It measures horizontally and vertically polarized radiance at 6.9, 10.65, 18.7, 23.8, 36.5, and 89.0 GHz; and vertically polarized radiance at 50.3 and 52.8 GHz. AMSR collected 290 data points per scan for the 6 GHz to 36 GHz channels and 580 data points per scan for the 89 GHz channel. Data are available via FTP.

Parameter(s):

SENSOR COUNTS

Platform(s):

ADEOS-II

Sensor(s):

AMSR

Data Format(s):

HDF-EOS2

Temporal Coverage:

28 January 2003 to 24 October 2003

Temporal Resolution:

50 minute

Spatial Resolution:

Not Specified

Spatial Coverage:

N:

90

S:

-90

E:

180

W:

-180

Blue outlined yellow areas on the map below indicate the spatial coverage for this data set.

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