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SSMIS

From Wikipedia, the free encyclopedia

The Special Sensor Microwave Imager / Sounder (SSMIS) is a 24-channel, 21-frequency, linearly polarized passive microwave radiometer system. The instrument is flown on board the United States Air Force Defense Meteorological Satellite Program (DMSP) F-16, F-17, F-18 and F-19 satellites, which were launched in October 2003, November 2006, October 2009, and April 2014, respectively.[1] It is the successor to the Special Sensor Microwave/Imager (SSM/I). The SSMIS on the F19 satellite stopped producing useful data in February 2016.[2]

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Transcription

Instrument characteristics

The scan geometry of the SSM/I(SSMIS have scan angle 143.2 grad)

The SSMIS sensor is a passive conically scanning microwave radiometer that combines and extends the current imaging and sounding capabilities of three previously separate DMSP microwave sensors: the SSM/T-1 temperature sounder, the SSMI/T- 2 moisture sounder, and the SSM/I. The SSMIS instrument measures microwave energy at 24 discrete frequencies from 19 to 183 GHz with a swath width of 1700 km.[3] The first SSMIS was launched aboard the DMSP-16 satellite on 18 October 2003. Due to a manufacturing mistake, the polarization for the channels at 50.3, 52.8, 53.6, 54.4 and 55.5 of the first unit of SSMIS (the one flying on DMSP-16) was reversed. Those five channels detect the vertical polarization rather than the Horizontal polarization detected by the successive units of SSMIS.[4]

Radiometric characteristics of the SSMIS[5] [1].
Channel # Frequency (GHz) Polarization Along-track resolution (km) Cross-track resolution (km) Spatial sampling (km x km) Instrument noise (K)
12 19.35 horizontal 73 47 45x74 0.35
13 19.35 vertical 73 47 45x74 0.35
14 22.235 vertical 73 47 45x74 0.45
15 37.0 horizontal 41 31 28x45 0.22
16 37.0 vertical 41 31 28x45 0.22
1 50.3 horizontal 17.6 27.3 37.5 0.34
2 52.8 horizontal 17.6 27.3 37.5 0.32
3 53.596 horizontal 17.6 27.3 37.5 0.33
4 54.4 horizontal 17.6 27.3 37.5 0.33
5 55.5 horizontal 17.6 27.3 37.5 0.34
6 57.29 right circular 17.6 27.3 37.5 0.41
7 59.4 right circular 17.6 27.3 37.5 0.40
19 63.283248 ± 0.285271 right circular 17.6 27.3 75 2.7
20 60.792668 ± 0.357892 right circular 17.6 27.3 75 2.7
21 60.792668 ± 0.357892 ± 0.002 right circular 17.6 27.3 75 1.9
22 60.792668 ± 0.357892 ± 0.0055 right circular 17.6 27.3 75 1.3
23 60.792668 ± 0.357892 ± 0.016 right circular 17.6 27.3 75 0.8
24 60.792668 ± 0.357892 ± 0.050 right circular 17.6 27.3 75 0.9
18 91.665 horizontal 14 13 13x16 0.19
17 91.665 vertical 14 13 13x16 0.19
8 150 horizontal 14 13 13x16 0.53
11 183.311 ± 1 horizontal 14 13 13x16 0.38
10 183.311 ± 3 horizontal 14 13 13x16 0.39
9 183.311 ± 6.6 horizontal 14 13 13x16 0.56

References

  1. ^ "Special Sensor Microwave/Imager (SSM/I) and Special Sensor Microwave Imager Sounder (SSMIS)". World Meteorological Office Observing Systems Capability Analysis and Review Tool. Retrieved 27 July 2021.
  2. ^ "Air Force Says DMSP-19 Weather Satellite is 'About Dead'". Space.com. 17 March 2016.
  3. ^ "SSMI and SSMIS Monitoring and Documentation". National Environmental Satellite, Data, and Information Service (NESDIS), NOAA. Retrieved 24 December 2010.
  4. ^ ["Intercalibration between special Sensor Microwave Imager/Sounder and Special Sensor microwave Imager"; B. Yan and F. Weng; IEEE TGRS, 2008, 46, 984]
  5. ^ Kunkee, David B.; Poe, Gene A.; Boucher, Donald J.; Swadley, Steven D.; Hong, Ye; Wessel, John E.; Uliana, Enzo A. (April 2008). "Design and Evaluation of the First Special Sensor Microwave Imager/Sounder". IEEE Transactions on Geoscience and Remote Sensing. 46 (4): 863–883. Bibcode:2008ITGRS..46..863K. doi:10.1109/TGRS.2008.917980. ISSN 1558-0644. S2CID 47668.
This page was last edited on 11 June 2022, at 02:58
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