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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 , Feb 5, 2007
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      WEATHER SATELLITES
      ================
      APT, DIGITAL and GEOSTATIONARY WEEKLY STATUS.
      ==========================================

      Author : Douglas S Deans. dsdeans@...
      Sections 2, 3 and 4 have updates.

      SECTION 1: POLAR APT/LRPT REPORT -- 5th February 2007
      =============================================

      Satellite Frequency (MHz) Status Image Quality

      NOAA 12 137.500 (APT) on good
      NOAA 14 137.620 (APT) off n/a
      NOAA 15 137.500 (APT) off see Note 5
      NOAA 17 137.620 (APT) on good
      NOAA 18 137.9125 (APT) on good
      MetOp-A 137.100 (LRPT) off see Note 4

      CHANGES SINCE LAST REPORT.
      None

      THIS WEEK'S POSSIBLE EVENTS.
      None expected.

      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's 12 and 15 when active on this frequency.
      Latest report below.
      29/01/2007 :- No interference noted recently from any of the above
      satellites. (My thanks to Mike Piper, Oregon USA for this report).

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

      3. 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).

      4. MetOp-A's A-side LRPT transmitter has failed. Currently the redundant
      B-side transmitter is off until further notice.

      5. There is a NOAA 12/15 VHF (137.500) conflict. NOAA 15 VTX-1 is off until
      about 27th February 2007.

      6. 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 HRPT/AHRPT REPORT -- 5th February 2007
      ===============================================

      CHANGES SINCE LAST REPORT.
      Feng Yun launch added.

      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 1D 1700.4 RHCP CHRPT Good
      MetOp-A 1701.3 RHCP AHRPT 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 recently improved.

      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 recently improved.

      4. 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.
      NOAA N' launch.....2008.
      Feng Yun 3 ....... late 2007.

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


      SECTION 3: CONTINENTAL GEOSTATIONARY WORLD
      ===========================================
      WEATHER SATELLITE REPORT -- 5th February 2007
      =======================================

      CHANGES SINCE LAST REPORT.
      None

      THIS WEEK'S POSSIBLE EVENTS.
      Meteosat 5 service to terminate.

      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).

      Satellite : Meteosat 9 (0°).
      Data : HRIT (digital) and LRIT (digital)
      Operational : No. Commissioning. Became standby satellite
      on 1st August 2006. (Test LRIT dissemination only).
      Note : A system test is planned from 12/02/07 till 19/02/07. This
      test will interrupt LRIT dissemination of Met-9 SEVIRI
      images and Meteorological Products
      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....6th February 2007.

      Satellite : Meteosat 7 (57.5°E)
      HRI (digital) - 1691 MHz
      Wefax (analogue) occasionally for ranging purposes
      only.
      Operational : 17th October 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.............

      Satellite : Feng Yun 2D (86.5°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. 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. After termination of RSS on 08/01/07, Meteosat-6 started a drift
      manoeuvre to 67.5 degrees East on 23/01/07. Its arrival on station is
      foreseen by end of April 07. Once on station, Meteosat-6 will support the
      DCP mission over the Indian Ocean during eclipse periods.

      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).

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


      SECTION 4: EUMETCAST REPORT -- 5th February 2007
      =========================================

      Service Status Hotbird Satellite (13° E)

      EARS 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
      EPS(MetOp-A) On Transponder 117: 10853.44 MHz

      CHANGES SINCE LAST REPORT.
      Meteosat 8 Note added.
      Meteosat 9 Note updated.
      FSD Note updated.
      IODC Note updated.
      MetOp-A note updated.
      EARS Note added.

      THIS WEEK AND FUTURE POSSIBLE EVENTS.
      Meteosat 8.
      Due to essential maintenance on 06/02/07 between 09:00 and 11:00 UTC there
      is a high risk of interruption to the following services:
      0 Deg. SEVIRI High Rate Meteosat-8
      0 Deg. SEVIRI Low Rate Meteosat-8
      0 Deg. Meteorological Products Meteosat-8
      Foreign Satellite Data
      Meteorological Data Distribution
      Data Collection and Retransmission Service

      On 06/02/07 Eumetsat will introduce two new products to the Meteosat-8
      Meteorological Data. MPEG (Multi-Sensor Precipitation Estimate)
      and FIRG (Active Fire Monitoring). Both products will be in GRIB2 format.
      Users will receive these products as they are disseminated on
      the same channel as current Meteorological Products. No registration is
      required.

      Meteosat 6.
      Eumetsat terminated the Rapid Scanning Service on 08/01/2007.

      Meteosat 9.
      There will be a Meteosat-9 East-West station keeping manoeuvre on 06/02/07
      at 02:58 UTC. Users may experience degraded image quality following the
      manoeuvre for up to 12 repeat cycles.
      Users may experience degraded meteorological product quality following the
      manoeuvre for up to 12 repeat cycles.

      A system test is planned from 12/02/07 till 19/02/07. This test will
      interrupt EUMETCAST and LRIT dissemination of Met-9 SEVIRI images and
      Meteorological Products.

      EARS.
      On 08/02/07 the filenaming of the ERS-SCAT "value-added" products in ASCAT
      format, disseminated via EumetCast, will change.
      An example of this new filename is provided below:
      scatt_20070129_122611_ers2___00000_ear_o_250_ovw.l2_bufr
      More information on this is available in the ERS Scatterometer Product User
      Manual, which is available on the websites of EUMETSAT and KNMI.

      FSD.
      Due to essential maintenance on 10/02/07 there is a high risk of late or
      missing Foreign Satellite Data from GOES11_135W between 0500 and 1100 UTC

      IODC Information.
      Services from Meteosat-5 will terminate on 06/02/07 at 10:00 UTC.
      Due to Meteosat-5 eclipse season between 30/01/07 and 06/02/07 slots 40 to
      41 may not be available.
      Due to sun co-linearity between 03/02/07 and 06/02/07 dissemination may be
      interrupted between 07:30 and 07:50 UTC.

      On 23/01/07, Meteosat-6 started a drift manoeuvre to 67.5 degrees East . Its
      arrival on station is foreseen by end of April 2007.
      Once on station, Meteosat-6 will support the DCP mission over the Indian
      Ocean during eclipse periods.

      MetOp-A
      The following EPS GDS products are available on Eumetcast on a trial basis.
      EPS-2 MetOp AMSA
      EPS-3 MetOp ASCAT
      EPS-7 MetOp HIRS
      EPS-8 MetOp MHS
      EPS-10 MetOp AVHRR

      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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