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CMS Lannion Brittany

CMS Lannion Brittany. PASSIVE MICROWAVE PROTECTION. Guy.Rochard@meteo.fr. WMO / ITWG/ EUMETNET/ METEO-FRANCE. Figure 5-2. Sensitivity of brightness temperature to geophysical parameters over ocean surface. Sensitivity of brightness temperature

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CMS Lannion Brittany

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  1. CMS Lannion Brittany

  2. PASSIVE MICROWAVE PROTECTION Guy.Rochard@meteo.fr WMO / ITWG/ EUMETNET/METEO-FRANCE

  3. Figure 5-2 Sensitivity of brightness temperature to geophysical parameters over ocean surface

  4. Sensitivity of brightness temperature to geophysical parameters over land surfaces

  5. SECONDARY LOBE SHAPE

  6. Global composite of brightness temperature (K) from AMSU-A Channel 3

  7. O2 absorption spectrum along a vertical path around 60 GHz (multiple absorption lines) PASSIVE SENSORS REQUIREMENTS IN O 2 ABSORPTION SPECTRUM AROUND 60 GHz (U.S. standard atmosphère - Absorption model: Liebe 1993) RESONANCE FREQUENCIES (GHz) 51.5034 52.0214 Shared 52.5424 53.0669 53.5957 54.1300 54.6712 55.2214 200 55.7838 56.2648 56.3634 56.9682 Excl. 57.6125 58.3239 58.4466 59.1642 Total oxygen absorption along a vertical path (dB) 59.5910 60.3061 60.4348 61.1506 61.8002 100 62.4112 55.78 GHz 62.4863 Excl. 62.9980 59.3 GHz 63.5685 55.22 GHz 64.1278 64.6789 52.6 GHz 65.2241 65.7648 66.3021 50.2-50.4 GHz 66.8368 67.3696 67.9009 0 50 55 60 65 70 Frequency (GHz)

  8. Weigthing functions at 50 to 60 GhZ

  9. Global composite of brigthness temperature (K) measurements from AMSU-A Channel 9

  10. SRD-MG n°4 Special meeting on Short-Range Radars ERO - Copenhagen, 1-2 April 2004 Source: CRAF – ESA - EUMETNET – EUMETSAT Subject: General concerns and position on implementation of UWB SRR in the 23.6 - 24 GHz band and modification proposals to the current draft report and ECC decision

  11. Proposal The CEPT Report on the way to "harmonise radio spectrum to facilitate a coordinated EU introduction of Automotive Short Range Radar systems" should favour an approach based on an immediate use of the 79 GHz and clearly indicate all concerns raised, among others, by the scientific and meteorological communities on the possible temporary implementation of SRR in the 24 GHz frequency band, hence proposing not to retain the "two phases approach" as a realistic and feasible solution.

  12. Water vapour absorption spectrum along a vertical path around 183 GHz

  13. The SAPHIR channels over the water vapor line O L 6 5 4 3 2 1 1 2 3 4 5 6 183,31 190 195 175 180 185 GHz

  14. Weigthing functions at 183 GhZ

  15. Global composite of brightness temperature (K) from AMSU-B Channel 3

  16. n Dn DeltaT IFOV SIZE 10-km pixels  57 GHz 0.4 GHz 0.2 K 78 km 60 km 6 x 6 144 ms 1500 K 119 GHz 0.4 GHz 0.4 K 37 km 30 km 3 x 3 72 ms 2200 K 183 GHz 0.3 GHz 0.6 K 24 km 30 km 3 x 3 72 ms 2800 K 380 GHz 0.7 GHz 0.5 K 12 km 30 km 3 x 3 72 ms 3500 K 425 GHz 0.4 GHz 0.5 K 10 km 30 km 3 x 3 72 ms 2700 K 380 GHz 2 GHz 1.5 K 12 km 10 km 1 6 ms 5200 K 425 GHz 1 GHz 1.5 K 10 km 10 km 1 6 ms 3700 K Ts Required system temperatures for GOMAS

  17. INTERNATIONAL TELECOMMUNICATION UNION RADIOCOMMUNICATIONSTUDY GROUPS February 2002 English only Draft Revision OfRECOMMENDATION ITU-R SA.515-3 Frequency bands and bandwidths used for satellite passive sensing (Question ITU-R 140/7 (1978-1990-1994-1997-2002) The ITU Radiocommunication Assembly, considering a) that environmental data relating to the Earth is of increasing importance;

  18. ITU draft REC. SA 515 Spectrum requirements for passive sensing of environmental data Up to 1000 GhZ

  19. INTERNATIONAL TELECOMMUNICATION UNION RADIOCOMMUNICATIONSTUDY GROUPS February 2002 English only DRAFT REVISION oFRECOMMENDATION ITU-R SA.1028‑1 PERFORMANCE CRITERIA FOR SATELLITE PASSIVE REMOTE SENSING (Question ITU-R 140/7) (1994-1997-2002) The ITU Radiocommunication Assembly, considering a) that certain frequency bands, including some absorption bands of atmospheric gases (e.g., O2(oxygen) and H2O(water vapour)), have been allocated for spaceborne passive microwave remote sensing;

  20. ITU draft REC. SA 1028 Spectrum requirements for passive sensing of environmental data Up to 1000 GhZ

  21. INTERNATIONAL TELECOMMUNICATION UNION RADIOCOMMUNICATIONSTUDY GROUPS February 2002 English only DRAFT REVISION ofRECOMMENDATION ITU-R SA.1029‑1 PERMISSIBLEINTERFERENCE CRITERIALEVELS FOR SATELLITE PASSIVE REMOTE SENSING (Question ITU-R 140/7) (1994-1997-2002) The ITU Radiocommunication Assembly, considering a) that certain frequency bands, including some absorption bands of atmospheric gases (e.g.,O2(oxygen)and H2O(water vapour)), have been allocated for spaceborne passive microwave remote sensing;

  22. DATA AVAILABILITY Data availability is the percentage of area or time for which accurate data is available for a specified sensor measurement area or sensor measurement time. For a 99.99% data availability, the measurement area is a square on the Earth of 2,000,000 km2, unless otherwise justified; for a 99.9% data availability, the measurement area is a square on the Earth of 10,000,000 km2 unless otherwise justified; for a 99% data availability the measurement time is 24 hours, unless otherwise justified

  23. http://cimss.ssec.wisc.edu/itwg/groups/frequency/ WEB(s) sites fore more infos. http://guy.rochard.free.fr/meteo/ http://www.eumetnet.eu.org/ http://www.wmo.ch/web/www/TEM/SG-RFC/Handbook.htm http://www.itu.int/ITU-R/index.html http://sfcgonline.org/

  24. 1990 Measurementsin the 10.6 to 10.7 GHz band with the Effelsberg 100m radio telescope 2000

  25. Some key problems to solve … To conclude what is needed above 275 GHz (central frequencies and bandwidths) 1) To conclude about ‘Delta T ‘ tables between WMO and ITU proposals 2) To conclude on % of data availability 3) To archive emissivity pictures of the Earth in microwaves below 50 GHz. 4)

  26. BACKGROUND: • Support ITU-Recs 515 , 1028 & 1029 • 2) Follow ITU rules (7C….WRC) • 3) Cooperate as an international scientific • working group for EESS (passive) needs

  27. NEXTSTEPS : • CEPT/FM 49 • WSEAS 2004 • SPIE 48 • SFCG 24 • ITU-R 7C • IGARSS’04 • SPIE ASIA/PACIFIC n°4 • ……

  28. Petition for Protection of 23.6 – 24 GHz & other microwave bands for Passive Environmental Remote Sensing http://guy.rochard.free.fr/meteo/ http://guy.rochard.free.fr/meteo/fichiers/petition.doc Guy.Rochard@meteo.fr Common scientific position about the protection of microwave bands for Passive Environmental Remote Sensing

  29. Annex The remote sensing scientists and engineers listed below have endorsed the position set forth in this paper. Legal guidance in the U.S.A has advised that U.S.A government individuals are acting in their personal capacities and they are not endorsing the paper on behalf of any government agency or other organization with which they are affiliated. However,[most]of the other people below are also endorsing the position set forth in this paper on behalf of their agency or organization. Myoung-Hwan AHN (RSRL/METRI, Korea) Vassily ASMUS (Planeta, Russia) Sylvia BARLAG (Satellite, KNMI, Netherland) Peter BAUER (Satellite Section, ECMWF) etc...120 names today and 5 or 6 publications

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