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Weather Satellite Report 2009/10.

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  • Douglas Deans
    WEATHER SATELLITES ================ APT, DIGITAL and GEOSTATIONARY WEEKLY STATUS. ========================================== Author : Douglas S Deans.
    Message 1 of 1 , Mar 9, 2009
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      WEATHER SATELLITES
      ================
      APT, DIGITAL and GEOSTATIONARY WEEKLY STATUS.
      ==========================================

      Author : Douglas S Deans. dsdeans@...
      Section 4 has updates.

      SECTION 1: POLAR APT/LRPT REPORT -- 9th March 2009
      ============================================

      Satellite Frequency (MHz) Status Image Quality

      NOAA 15 137.500 (APT) on good
      NOAA 17 137.620 (APT) on good
      NOAA 18 137.100 (APT) on good
      NOAA 19 137.9125(APT) on see Note 6
      Metop-A 137.100 (LRPT) off see Note 3

      CHANGES SINCE LAST REPORT.
      None.

      THIS WEEK'S POSSIBLE EVENTS.
      Possible switch-on of NOAA 19 AVHRR IR channel for APT.
      (should happen eventually !).

      NOTES.

      1. Three of the older NOAA weather satellites which have been
      decommissioned and are tumbling freely are know to sporadically put out
      a carrier on 137.500 MHz. The satellites are TIROS-N, NOAA 6 and NOAA 9
      When the relevant footprints overlap this will cause interference to
      NOAA 15 when active on this frequency.
      Latest report below.
      22/07/08 - There is some recent evidence that NOAA 9 is once again
      transmitting a spurious carrier from time to time. (I am grateful to
      John Cooper from Oxford for this report).

      2. NOAA 16's APT transmission system failed a few months after launch.

      3. Metop-A's A-side LRPT transmitter has failed. Currently the redundant
      B-side transmitter is off until further notice (No further service
      expected due to interference with HIRS instrument).

      4. NOAA 14 was decommissioned on 23rd May 2007.

      5. NOAA 12 was decommissioned on 10th August 2007.

      6. For several weeks the APT will carry 2 visible images (channels 1 and
      2). The infra-red system requires out-gassing before being switched
      on and is the reason for the delay (usually about 2/3 weeks) in its
      operation. My understanding is that the outgassing prevents
      precipitation (and contamination) when the coolers are switched on.
      Thereafter the APT format should follow the norm of Channel 2 (visible)
      and channel 4 (IR) during daylight passes, switching automatically
      to channels 3 (3A) and 4 during darkness.

      7. Elements are available from :-

      http://www.space-track.org and
      http://celestrak.com/NORAD/elements/

      LAUNCHES.
      None due.


      SECTION 2: POLAR HRPT/AHRPT REPORT -- 9th March 2009
      =============================================
      CHANGES SINCE LAST REPORT.
      None.

      THIS WEEK'S POSSIBLE EVENTS.
      None expected.

      Satellite Frequency Antenna Mode Image Quality
      (MHz)
      NOAA 15 1702.5 Omni HRPT Weak
      NOAA 16 1702.5 LHCP HRPT Mixed ( note 3)
      NOAA 17 1698.0 RHCP HRPT Good
      NOAA 18 1707.0 RHCP HRPT Good
      NOAA 19 1698.0 RHCP HRPT Good
      Feng Yun 1D 1700.4 RHCP CHRPT Good
      Feng Yun 3A see note 5
      Metop-A 1701.3 RHCP AHRPT Good (note 4)

      NOTES.

      1. NOAA 14 was decommissioned on 23rd June 2007.

      2. NOAA 12 was decommissioned on 10th August 2007.

      3. On Friday 19th September 2003 NOAA 16 developed AVHRR synch. problems
      similar to those on NOAA 14 (and previously NOAA 15).
      Since then reports have been mixed. Some periods of good data, some
      poor.
      UPDATE: Scan motor performance has recently improved.

      4. On 29 September 2008, EUMETSAT commenced a partial Metop-A AHRPT
      Direct Readout service. Due to the operational constraints, the
      activation of AHRPT is for a limited geographical region covering
      the North Atlantic and European area (southbound passes only). This
      service is being introduced for a trial period of up to 2 months,
      following which the activation scenario will become operational. For
      further details on this service see:
      http://www.eumetsat.int/Home/Main/Access_to_Data/Metop__amp__NOAA_Services/SP_1117714487826?l=en

      5. Feng Yun 3A was declared operational on 12th January 2009. My thanks to
      Johnny Lin for drawing this to my attention.
      I am also grateful to Dave Wright of Dartcom for confirming that
      unfortunately (as usual) the Chinese have not strictly complied with the
      CGMS AHRPT Global Standard so reception using a standard Metop AHRPT
      receiver is not possible.

      LAUNCHES.
      None due.


      SECTION 3: CONTINENTAL GEOSTATIONARY WORLD
      ===========================================
      WEATHER SATELLITE REPORT -- 9th March 2009
      =====================================

      CHANGES SINCE LAST REPORT.
      None.

      THIS WEEK'S POSSIBLE EVENTS.
      None.

      Europe & Africa
      ------------------
      Satellite : Meteosat 8 (9.5°E)
      Data : HRIT (digital) and LRIT (digital)
      Operational : Yes, RSS and Standby for Meteosat 9.

      Satellite : Meteosat 9 (0°) (note 7).
      Data : HRIT (digital) and LRIT (digital)
      Operational : Yes

      North America
      ----------------
      East.

      Satellite : GOES 12 (75.0° W)
      Data : GVAR (digital) - 1685.7 MHz
      LRIT (digital) -1691 MHz
      Operational : Yes

      West.

      Satellite : GOES 11 (135°W)
      Data : GVAR (digital) - 1685.7 MHz
      LRIT (digital) - 1691 MHz
      Operational : Yes

      South America
      ----------------
      Satellite : GOES 10 (60°W)
      GVAR (digital) - 1685.7 MHz
      LRIT - No service.

      Asia (Russian Operated Satellite)
      --------------------------------------

      Satellite : GOMS N2 / ELECTRO-L
      Data : HRIT/LRIT.
      Operational : Launch date unknown.

      Asia (European Operated Satellites)
      ----------------------------------------
      Satellite : Meteosat 7 (57.5°E)
      HRI (digital) - 1691 MHz
      Wefax (analogue) occasionally for ranging purposes
      only.
      Operational : Yes.

      Satellite : Meteosat 6 (67.5°E) (Note 2).

      Asia (Indian Operated Satellite)
      -----------------------------------
      Satellite : Metsat
      Data : None available.
      Operational : Present....

      Satellite : Insat 3A (Note 3.)
      Data : VHRR (digital) 2599 MHz
      Operational : Yes.


      Asia & Oceania (Japanese Operated Satellites)
      -----------------------------------------------------
      Satellite : MTSAT-1R (140° E) (note 5.)
      Data : HRIT (digital) and LRIT(digital) on 1691 MHz.
      (Note 6.)
      Operational : Yes.


      Asia & Oceania (Chinese Operated Satellites)
      ----------------------------------------------------
      Satellite : Feng Yun 2C (105°E)
      Data : SVISSR (digital) and LRIT (digital)
      Operational : Yes.

      Satellite : Feng Yun 2D (86.5°E).
      Data : SVISSR (digital) and LRIT (digital)
      Operational : Yes. Parallel operation with 2C.
      (My thanks to Johnny Lin for the update).

      Satellite: Feng Yun 2E (123.3° E)
      Data : SVISSR (digital) and LRIT (digital)
      Operational : No. Commissioning.

      NOTES.

      1. Meteosat 7 stopped its 0° service at 09.00 UTC on 14th June 2006.

      2. Meteosat-6 arrived on station at 67.5 degrees East, on the 27 April 2007.
      After a short testing campaign, Meteosat-6 is now supporting the DCP
      mission over the Indian Ocean during eclipse periods.

      3. Insat 3A is a combined data and meteorological satellite.

      4. For those interested in EMWIN data, the following sats/frequencies apply.

      GOES 7 (175 W) 1690.725 MHz.
      GOES 11 (135 W) 1690.725 MHz
      GOES 12 (74.5 W) 1690.725 MHz
      For further info. there are many sources but the following is
      particularly informative:-
      http://iwin.nws.noaa.gov/emwin/user-intro.htm

      5. This satellite is also known as HIMAWARI 6.

      6. HiRID and WEFAX was discontinued on 12th March 2008. It was replaced
      with HRIT/LRIT (after many months of dual dissemination).

      7. Only LRIT (1691.0 MHz) is provided in direct readout.
      Full HRIT and LRIT service from Eumetcast.

      LAUNCHES.
      GOES O ....... Launch due 28th April 2009.


      SECTION 4: EUMETCAST REPORT -- 9th March 2009
      =======================================

      Service Status Eurobird 9A Satellite (9° E)

      EARS On Transponder TP63: 11976.82 MHz
      Meteosat 8 (RSS) On Transponder TP63: 11976.82 MHz
      Meteosat 9 On Transponder TP63: 11976.82 MHz
      DWDSAT On Transponder TP63: 11976.82 MHz
      EPS(Metop-A) On Transponder TP63: 11976.82 MHz

      CHANGES SINCE LAST REPORT.
      Meteosat 8 (RSS) Note updated.
      FSD Note updated.

      THIS WEEK AND FUTURE POSSIBLE EVENTS.
      General Note.
      Due to sun interferences of the disseminating satellites users might
      experience lower signal margin or outages on EUMETCast for a short period
      (less than 15 min) every day :-
      on Ku band Europe between 23/02/2009 and 14/03/2009
      on C band Africa between 23/02/2009 and 06/04/2009
      on C band Americas between 23/02/2009 and 12/04/2009

      The exact times and durations of the signal degradation or outages depend on
      the reception location and the used satellite.
      Please use following link to determine the time for your location:
      http://www.satellite-calculations.com/SUNcalc/SUNcalc.htm
      - enter as satellite Eurobird 9 (Ku band Europe), or Atlantic Bird 3 (C
      band Africa), or NSS 806 (C band Americas)
      - enter location, band, season and antenna size and press "Calculate"

      Future Event.
      On 31 March 2009 EUMETSAT will introduce a registration requirement for
      EUMETCast access to all level 2 satellite products generated by EUMETSAT and
      the Satellite Application Facilities (SAFs). After this date, only
      registered users will continue to receive level 2 products through
      EUMETCast. The registration requirement is being introduced to allow
      EUMETSAT and its SAFs greater visibility of product usage.
      New EUMETCast users will be able to select their choice of level 2 product
      sets (Meteosat, Metop/NOAA, Ocean Sea Ice, Land Analysis
      and Ozone & Atmospheric Chemistry) via the online registration form.
      Existing EUMETCast user may request a continuation of access
      to these products by sending an email to the User Helpdesk via
      ops@....
      The registration requirement comes into force on 31 March 2009 and existing
      users are kindly requested to indicate their product requirements before
      this date to avoid any unnecessary loss of service.

      Meteosat 8 RSS.
      Due to a Meteosat-8 East-West station keeping manoeuvre on 10/03/09 at
      03:39:00 UTC, Users may experience degraded image quality following the
      manoeuvre for up to 3 hours.
      Users may experience degraded meteorological product quality following the
      manoeuvre for up to 3 hours.

      The Meteosat-8 Rapid Scanning Service will be interrupted from 09:00 UTC on
      10/03/09 until 12:00 UTC on 13/03/09 for the regular monthly rapid scanning
      interruption and for essential maintenance to the Primary Ground Station
      antenna. Full earth scanning data (if any) will not be disseminated.

      FSD.
      GOES11_135W eclipse from 09/02/09 to 28/04/09: 09:00 UTC and 10:00 UTC files
      may not be available.
      GOES12_75W eclipse from 14/02/09 to 28/04/09: 05:00 UTC and 06:00 UTC files
      may not be available.
      MTSAT-1R_140E eclipse from 15/02/09 to 25/04/09: 14:00 UTC and 15:00 UTC
      files may not be available.
      Update to compression of MTSAT1R data.
      At 10:00 UTC, on 11/03/09, the compression for the MTSAT1R 3.8 channel will
      be enabled. This will use the same wavelet compression used by the other
      MTSAT1R channels.
      FY2C eclipse season from 22/02/09 to 12/04/09: 16:00 to 18:00 UTC files may
      not be available.

      IODC.
      Due to Meteosat-7 eclipse season from 12/02/09 to 31/03/09, slots 39 to 43
      may not be available.

      Metop-A.
      The following EPS GDS products are available on Eumetcast.

      EPS-2 PID 510 Metop AMSA operational
      EPS-3 PID 510 Metop ASCAT operational
      EPS-4 PID 510 Metop ATOVS operational
      EPS-5 PID 510 Metop GOME operational
      EPS-6 PID 510 Metop GRAS operational
      EPS-7 PID 510 Metop HIRS operational
      EPS-8 PID 510 Metop MHS operational
      EPS-10 PID 510 Metop AVHRR operational
      EPS-11 PID 510 Metop IASI operational
      EPS-13 PID 510 NOAA AMSA operational
      EPS-14 PID 510 NOAA ATOVS operational
      EPS-15 PID 510 NOAA GAC operational
      EPS-16 PID 510 NOAA HIRS operational
      EPS-17 PID 510 NOAA MHS operational
      EPS-18 PID 510 EPS Service News operational



      NOTES.

      1. Reports for all sections should be sent to :-
      Douglas Deans dsdeans@...

      2. For further information on the Eumetcast service see :-
      David Taylor's web site
      http://www.satsignal.eu => Weather Satellites, Using EUMETCast
      or Satellite Tools, MSG Data
      Manager.
      or the Eumetsat web site
      www.eumetsat.int

      GENERAL
      =======
      For further weather satellite related information join GEO, Group for Earth
      Observation, and receive the informative quarterly magazine. See :-
      http://www.geo-web.org.uk/

      To download element sets for all satellites visit the following sites :
      http://www.space-track.org and
      http://celestrak.com/NORAD/elements/
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