AMSU A
STATUS
Flying On NOAA-15 Through NOAA-18, As Well As The NASA EOS Aqua Satellite.
AVAILABILITY
Products are produced operationally by NOAA - see the POES Program web site at http://goespoes.gsfc.nasa.gov/poes/products/index.html. In addition, the Global Hydrology Research Center at the NASA Marshall Space Flight Center processes and archives AMSU-A data - see their web site at http://ghrc.msfc.nasa.gov/uso/readme/amsu-a.html#platforms for more details.
REQUEST PROCEDURE
See the web sites for more information.
Satellite Instruments
The Advanced Microwave Sounding Unit-A (AMSU-A) system is implemented in two separate modules: the AMSU-A1 and AMSU-A2. The AMSU-A is a multi-channel microwave radiometer that will be used for measuring global atmospheric temperature profiles and will provide information on atmospheric water in all of its forms (with the exception of small ice particles, which are transparent at microwave frequencies) from the NOAA KLM spacecraft. AMSU-A is a cross-track, line-scanned instrument designed to measure scene radiances in 15 discrete frequency channels which permit the calculation of the vertical temperature profile from about 3 millibars (45 km) pressure height to the Earth's surface. At each channel frequency, the antenna beamwidth is a constant 3.3 degrees (at the half power point). Thirty contiguous scene resolution cells are sampled in a stepped-scan fashion every eight seconds, each scan covering 50 degrees on each side of the subsatellite path. These scan patterns and geometric resolution translate to a 50 km diameter cell at nadir and a 2,343 km swath width from the 833 km nominal orbital altitude.
CONTACT
Michael Goodman
National Space Science and Technology Center
320 Sparkman Dr. Huntsville, AL 35805
256-961-7890
Michael.Goodman@nasa.gov
http://ghrc.msfc.nasa.gov/uso/readme/amsu-a.html#6._References
SPECIFICATIONS
Measurment TypeMicrowave-sounder
Platform TypeNOAA-15 -16 -17 -18 (-K, -L, -M, -N) and NASA Aqua
OrbitSun synchronous
Spectral Coverage
Active/PassivePassive
Scan PatternCross track
Variables
Altitude705
Inclination98
Repeat Time16 day
Wavelength23.8 to 89.0GHz
Number of Bands15
Start DateMay 1998
Temporal CoverageLaunch date for NOAA 15 was 13 May 1998 ; NOAA-16 on 21 Sep 2000; NOAA-17 24 Jun 2002; NOAA-18 on 24 May 2005 and NASA Aqua 4 May 2002
Swath Width2343
Resolution 150km
REFERENCES
Details of the instrument and satellite are found in the NOAA KLM User's Guide - http://www2.ncdc.noaa.gov/docs/klm/html/c3/sec3-4.htm The Marshall and CIRA (http://amsu.cira.colostate.edu/) web sites contain much information.
UPDATED ON
23 Oct 2009 08:32