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Weather Satellite Report.

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  • Douglas Deans
    WEATHER SATELLITES ================ APT, DIGITAL and GEOSTATIONARY WEEKLY STATUS. ========================================== Author : Douglas S Deans.
    Message 1 of 289 , Aug 27, 2006
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      WEATHER SATELLITES
      ================
      APT, DIGITAL and GEOSTATIONARY WEEKLY STATUS.
      ==========================================
      Author : Douglas S Deans. dsdeans@...
      Sections 4 has updates.

      SECTION 1: POLAR APT REPORT -- 28th August 2006
      =======================================

      Satellite Frequency (MHz) Status Image Quality

      NOAA 12 137.500 on good
      NOAA 14 137.620 off n/a
      NOAA 15 137.500 on good
      NOAA 17 137.620 on good
      NOAA 18 137.9125 on good

      CHANGES SINCE LAST REPORT.
      None.

      THIS WEEK'S POSSIBLE EVENTS.
      None expected.

      NOTES.

      1. NOAA 9 was permanently deactivated some years ago and is tumbling
      freely. Unfortunately it has a sporadic carrier on 137.500 (varies
      quickly according to orientation) and can cause interference to NOAA 12
      and NOAA 15.
      Update 01/05/2006 : No reports of interference for many months.

      2. Tiros-N and NOAA 6 are putting a carrier out on 137.500 and will
      interfere with NOAA 12 and 15 when their footprints overlap.
      Update 01/05/2006 : No reports of NOAA 6 interference for many months.
      Update 27/07/2006 : TIROS-N causing serious interference to NOAA 12.
      (My thanks to Patrik Tast for this report)

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

      4. NOAA 18's APT frequency was changed back as planned on 20th July 2006.
      The change was from VTX-1 (137.100 MHz) to VTX-2 (137.9125 MHz).

      5. Elements are available from :-

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

      LAUNCHES.
      NOAA N' launch.....2008.

      Douglas Deans.
      Dunblane, Scotland.


      SECTION 2: POLAR DIGITAL REPORT -- 28th August 2006
      ==========================================

      CHANGES SINCE LAST REPORT.
      None.

      THIS WEEK'S POSSIBLE EVENTS.
      None expected.

      Satellite Frequency Antenna Mode Image Quality
      (MHz)
      NOAA 12 1698.0 RHCP HRPT Good
      NOAA 14 1707.0 RHCP HRPT Mixed ( note 1)
      NOAA 15 1702.5 Omni HRPT Weak
      NOAA 16 1702.5 LHCP HRPT Mixed ( note 3)
      NOAA 17 1707.0 RHCP HRPT Poor (note 2)
      NOAA 18 1698.0 RHCP HRPT Good
      Feng Yun 1C 1700.4 RHCP CHRPT No data (note 4)
      Feng Yun 1D 1700.4 RHCP CHRPT Good


      NOTES.

      1. On 14th April 2004 NOAA 14's AVHRR scan motor stalled. It was assumed
      that it would be unlikely to work again.
      However on the 16th July 2005 it unexpectedly sprung to life with
      nominal currents and more importantly nominal synch delta values. Good
      imagery was once again being reported.
      UPDATE: Scan motor performance has been much better for the past few
      months with good imagery.

      2. Problems have developed with STX-3 (1707 MHZ). Power has dropped from
      approx. 8W to about 2.4W resulting on a greatly reduced signal strength.

      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 been much better for the past few
      months with good imagery.

      4. Although all channels are being transmitted on Feng Yun 1C, there is no
      image data, so the channels are effectively empty.

      5. The following HRPT transmitter changes were effective from
      30th August 2005. The re-assignments were :-

      NOAA 16 changed from STX1 (1698 MHz) to STX2 (1702.5 MHz).
      NOAA 18 changed from STX3 (1707 MHz) to STX1 (1698 MHz).

      LAUNCHES.
      Metop-2 (Metop-A after launch)...... 7th October 2006.

      Douglas Deans.....with thanks to Lawrence Harris for his regular updates and
      reports.


      SECTION 3: CONTINENTAL GEOSTATIONARY WORLD
      ===========================================
      WEATHER SATELLITE REPORT -- 28th August 2006
      ======================================

      CHANGES SINCE LAST REPORT.
      None.

      THIS WEEK'S POSSIBLE EVENTS.
      None expected.

      Europe & Africa
      ------------------
      Satellite : Meteosat 8 (3.5° W)
      Data : HRIT (digital) and LRIT (digital)
      Operational : Since February 2004 (Note 2).

      Satellite : Meteosat 6 (10°E) (Note 4)
      Data : HRI (digital) - 1691 MHz (Occasional wefax for ranging)
      Operational : Europe RSS. Service finishes end 2006.

      Satellite : Meteosat 9 (0°).
      Data : HRIT (digital) and LRIT (digital)
      Operational : No. Commissioning. Becomes standby satellite
      on 1st August 2006. (Test dissemination only).

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

      Satellite : GOES 12 (75.1° W)
      Data : GVAR (digital) - 1685.7 MHz
      LRIT (digital) -1691 MHz
      Operational : Present .......

      West.

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

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

      Satellite : GOMS / Electro 2
      Data : Not yet specified (HRIT/LRIT likely)
      Operational : To be launched 2006.

      Asia (European Operated Satellite)
      ----------------------------------------

      Satellite : Meteosat 5 (63°E) (Note 3)
      Data : HRI (digital) - 1691 MHz
      Wefax (analogue) -1691 MHz (from time to time)
      Operational : Present....September 2006

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

      Satellite : Insat 3A (Note 5.)
      Data : VHRR (digital) 2599 MHz
      Operational : Present ............


      Asia & Oceania (Japanese Operated Satellites)
      -----------------------------------------------------
      Satellite : MTSAT-1R (140° E) (note 8.)
      Data : HiRID and HRIT (digital) and
      Wefax(analogue)/LRIT(digital) shared on 1691 MHz.
      (Note 9)
      Operational : Present......


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


      NOTES.

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

      2. HRIT & LRIT data will not be disseminated through the satellite but will
      be provided via Hotbird satellite in DVB mode. See the Eumetcast
      status report for more information.

      3. Meteosat 5 now operates with only one channel.

      4. Meteosat 6 is providing a 10 minute rapid scan service of Europe on HRI.

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

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

      GOES 7 (175 W) 1690.725 MHz.
      GOES 10 (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

      7. MSG-1 became operational on 29th January 2004, and is now known as
      Meteosat 8.

      8. This satellite is also known as HIMAWARI 6.

      9. HiRID and WEFAX to be discontinued in December 2007 (Thanks to Dale
      Hardy for information).


      For updates/additions or errors (in this section) reply to
      Dave Cawley Information@...
      or Douglas Deans.

      SECTION 4: EUMETCAST REPORT -- 28th August 2006
      ========================================

      Service Status Hotbird Satellite (13° E)

      EARS On Transponder 117: 10853.44 MHz
      RSS On Transponder 117: 10853.44 MHz
      Meteosat 8 On Transponder 117: 10853.44 MHz
      Meteosat 9 On Transponder 117: 10853.44 MHz
      DWDSAT On Transponder 117: 10853.44 MHz
      (requires subscription)

      CHANGES SINCE LAST REPORT.
      Meteosat 5 note updated.
      Meteosat 6 note updated.
      Meteosat 7 note updated.
      FSD note updated.

      THIS WEEK'S POSSIBLE EVENTS.
      General Note.
      There will be changes to the Meteosat-8 and Meteosat-9 Meteorological
      Product Generation in September 2006. For details please see:
      http://www.eumetsat.int/idcplg?IdcService=SS_GET_PAGE&ssDocName=006655&l=en&ssTargetNodeId=115

      EARS.
      On 29/08/06 EARS BUFR products will be disseminated using updated BUFR
      tables. Users of EARS data in BUFR should make sure they have appropriate
      BUFR tables (Master Table version 13) in place.
      See http://www.wmo.ch/web/www/WMOCodes.html)
      for Master Table version 12 from November 2005. The changes agreed to
      support the representation of MHS data are given on page 52 of
      (http://www.wmo.ch/web/www/WMOCodes/Updates/BUFRCREX/Preoperational-2006July10.doc),
      and these should be added to Master Table Version 12 to make version 13.

      Meteosat 5.
      Due to an East-West station keeping manoeuvre on 29/08/06 at 23:58 UTC,
      users may observe degraded image quality for up to 6 hours after the
      manoeuvre.
      Due to Meteosat-5 eclipse season between 04/08/06 and 27/09/06 slots 39 to
      41 may not be available.

      Meteosat 6.
      There will be an interruption to the Rapid Scanning Service between 18:00
      UTC on 28/08/06 and 18:00 UTC on 29/08/06, for ranging and full disc
      imaging.
      Due to the eclipse season between 13/08/06 and 01/10/06 slots 46, 47, 48 and
      1 may not be available.

      Meteosat 7.
      During the relocation of Meteosat-7 to 57.5 degrees east, a change of the
      reference longitude for the image projection will be necessary.
      On 22/08/06, the longitude of the image projection was changed from 20 to
      30 degrees East. Subsequent changes will be necessary every two to three
      weeks until Meteosat-7 has reached its final position.
      For more information please see:
      http://www.eumetsat.int/groups/ops/documents/document/pdf_met7_position_during_drift.pdf

      Due to Meteosat-7 eclipse season between 23/08/06 and 09/10/06 slots 39 to
      46 may not be available.

      Meteosat 8.
      A North-South orbit inclination manoeuvre followed by a spin rate adjustment
      will be performed on 28/08/06 at 06:58.
      The manoeuvre may be followed by up to 24 hours of degraded quality of
      Meteosat-8 SEVIRI images and meteorological products .

      FSD.
      Due to a GOES11_135W manoeuvre planned on 29/08/06 there will be no image at
      15:00 UTC and incomplete images at 18:00 and 21:00 UTC.
      Foreign Satellite Data availability during eclipse season:
      GOES12_75W eclipse from 13/08/06 to 4/10/06, no image at 0600 UTC.
      GOES11_135W eclipse from 14/08/06 to 30/10/06,,no image at 0900 UTC.
      MTSAT-1R_140E eclipse from 18/08/06 to 22/10/06: no image at 1500 UTC.
      During MTSAT-1R (140E) eclipse 14:00 UTC images are planned as backup.

      Any reports for this section should be sent to :-
      Douglas Deans dsdeans@...


      NOTES.

      1. For further information on the Eumetcast service see :-
      David Taylor's web site
      http://www.satsignal.net => Weather Satellites, ATOVS or
      MSG Data Manager.
      or the Eumetsat web site
      www.eumetsat.int


      GENERAL
      =======
      To download element sets for all satellites visit the following sites :

      http://www.space-track.org and
      http://celestrak.com/NORAD/elements/
    • Douglas Deans
      Please note that the following important APT information was missed in today s WSR, Section 1. My thanks to Rob Denton for drawing this to my attention.
      Message 289 of 289 , Jun 22, 2009
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        Please note that the following important APT information was missed in
        today's WSR, Section 1.
        My thanks to Rob Denton for drawing this to my attention.

        Regards
        Douglas.


        On 23 June 2009, NOAA will implement the following VTX configuration
        changes:

        NOAA-19's operational VTX frequency will be switched to 137.1 MHz (from
        VTX2 to VTX1). The change will occur during rev 1936 between the first
        command time of 1824Z and the last command time of 1838Z.

        NOAA-18's operational VTX frequency will be switched to 137.9125 MHz
        (from VTX1 to VTX2). The change will occur during rev 21088 between the
        first command time of 1852Z and the last command time of 1904Z.

        This change will not impact APT data on any other NOAA satellite since
        both of the NOAA-18 and NOAA-19 VTX frequencies are different than the
        rest of the constellation.
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