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dorismail               17-Dec-2018 15:02:25 Message No 1152
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Author: Ferrage Pascale <Pascale.Ferrage@cnes.fr>
Subject: Jason-3  & Sentinel2A, 3B and Saral / POE-F orbit standards &




Dear Colleagues,

Following the DORISmail 1142 (Alexandre Couhert)  here is the current status 
regarding  the delivery of the orbits in POE-F standard:


-      Jason3 has switched to the POE-F standard, and the reprocessed Jason3 
orbits in POE-F standard have been delivered to IDS Data centers* since the 
beginning,

-      Sentinel 3A and 3B and Saral have also switched to the POE-F standard
and the reprocessing for these missions  will start in February-March 2019,

          Note that the Center of Phase positions have been updated for 
		  Sentinel3A  and Saral, the documentation has been updated accordingly at:
          ftp://ftp.ids-doris.org/pub/ids/satellites/DORISSatelliteModels.pdf,  
		  The orbits delivered in POE-F standard take into account these new positions.

(*) The problems of uploading DORIS data to the CDDIS has been solved, The 
data and products are again regularly distributed to the CDDIS, and we are 
currently completing the missing data/products over the past period.

Don't forget to look on the 2 servers  CDDIS: ftp://ftp.cddis.eosdis.nasa.gov/pub/doris/ , 
and IGN: ftp://doris.ign.fr/pub/doris/ or ftp://doris.ensg.eu/pub/doris/ 
to get the DORIS data/products,  and please report any missing files.

Best Regards,
Pascale Ferrage


De : Couhert Alexandre <Alexandre.Couhert@cnes.fr<mailto:Alexandre.Couhert@cnes.fr>>
Envoy=E9 : mardi 30 octobre 2018 10:17
=C0 : dorismail@ids-doris.org<mailto:dorismail@ids-doris.org>
Objet : [DORISMail] No 1142 : Jason-3 / CNES POE-F orbit standards

Dear colleagues,

The first Jason-3 precise orbits (cycles 95 and 96) in the new POE-F standards
(previously GDR-E or POE-E standards) were delivered today to the CDDIS/IGN
data servers. They are flagged with the version number VV=3D20 in the file name:

/pub/doris/products/orbits/ssa/ja3/ssaja320.b18249.e18259.DG_.sp3.001.Z
/pub/doris/products/orbits/ssa/ja3/ssaja320.b18259.e18269.DG_.sp3.001.Z

(reminder of filename convention:
ssa<sss>VV.bXXDDD.eYYEEE.dgs.sp3.LLL.Z

where :
      ssa fixed part (=3Dssa pour SSALTO)
      sss =3D satellite three-character abbreviation : ja3
      VV  =3D version number of the solution (=3D20 for POE-F)
      b   =3D fixed part ("begin")
      XX  =3D last two digits of year of first position
      DDD =3D three-digit day of year of first position (2)
      e   =3D fixed part ("end")
      YY  =3D last two digits of year of last position
      EEE =3D three-digit day of year of last position (2)
      dgs =3D types of data used for the orbit determination
                d=3D "D" or "_" : if DORIS data are used or not
                g=3D "G" or "_" : if GPS data are used or not
                s=3D "S" or "_" : if SLR data are used or not
      sp3 =3D fixed part, referring to the SP3 format
      LLL =3D version number of the file)

The previous Jason-3 precise orbits (cycles < 95) have been reprocessed and
will be flagged with the same version number, when delivered to the CDDIS/IGN
data servers. The old POE-E/GDR-E orbits (flagged with the version number 10)
will then be moved to a new separate directory. The readme file included in the
satellite directory will be updated accordingly.

Sentinel-3A POE orbits will switch to the POE-F standards from the beginning
of cycle 38 (end of the tandem period and during the drift phase). Sentinel-3B
POE orbits will be produced in POE-F standards from the same date.

Saral POE orbits will switch to the POE-F standards by the end of the year.

Jason-2 and CryoSat-2 POE-F orbits will switch to the POE-F standards in 2019.

HY-2A POE orbits will switch to the POE-F standards at a later stage, without
being reprocessed.

The reprocessing of the TOPEX/Poseidon POE orbits is currently being finalized
and should be available by the end of this year.

The reprocessing of the Jason-1 and Envisat POE orbits is not planned so far.

Spot satellite orbits will not be reprocessed.

A summary of the changes between the previous GDR-E/POE-E and the new
POE-F POD standards can be found on the IDS web site on the page:
ftp://ftp.ids-doris.org/pub/ids/data/POD_configuration_POEF.pdf

Best regards,
CNES POD Team

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Alexandre Couhert
Orbit Determination Department - Flight Dynamics Division
CNES - Centre Spatial de Toulouse
18 Av. Edouard Belin, 31401 Toulouse cedex 9, FRANCE
Tel.: +33 5 61 28 20 56 | Fax: +33 5 61 28 18 55
alexandre.couhert@cnes.fr<mailto:alexandre.couhert@cnes.fr> | http://www.cnes.fr<http://www.cnes.fr/>
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