boundary="_000_MRZP264MB2826F9049924207FAB4916ACC3B3AMRZP264MB2826FRAP_"


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dorismail               13-Nov-2023 16:18:07 Message No 1371
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Author: Soudarin Laurent <lsoudarin@groupcls.com>
Subject: SWOT DORIS data at CDDIS and IGN Data Centers




Dear colleagues,

We are pleased to announce that the delivery of DORIS/SWOT data to IDS has =
begun: DORIS/RINEX, sp3 POE orbits, mass, maneuver and attitude history fil=
es.
Quaternions files and solar panel angles will be provided in a second step.


DORIS/RINEX and sp3 POE orbits are available at IDS Data Centers:
CDDIS: (authenticated https) https://cddis.nasa.gov/archive/ ; (authenticat=
ed ftp-ssl) ftp://gdc.cddis.eosdis.nasa.gov/
IGN: (anonymous ftp)  ftp://doris.ign.fr/pub/<ftp://doris.ign.fr/pub/doris/=
> or ftp://doris.ensg.ign.fr/pub/<ftp://doris.ensg.ign.fr/pub/doris/>


  *   DORIS/RINEX
Files are delivered on a daily basis (from 2023/01/12) and stored in the di=
rectory doris/data/swo/

File name : sworxYYDDD.LLL.Z

Note that some DORIS/RINEX files do not exit (information given at https://=
ids-doris.org/ids/data-products/tables-of-data-products.html#non-existent-f=
iles)

sworx23140.001.Z (2023/05/20)

sworx23141.001.Z (2023/05/21)

sworx23265.001.Z (2023/09/22)

sworx23266.001.Z (2023/09/23)

sworx23267.001.Z (2023/09/24)

sworx23268.001.Z (2023/09/25)

sworx23269.001.Z (2023/09/26)

Consequently, you will note some gaps in POE sp3 series.


  *   Precise Orbit Ephemeris from CNES/SOD (in sp3c format)
One file per 7-day arc stored in the directory doris/products/orbits/ssa/swo

File name: ssaswoVV.bXXDDD.eYYEEE.DG_.sp3.LLL.Z

Mass, maneuver and attitude history files are available at IDS Central Bure=
au
ftp://ftp.ids-doris.org/pub/ids/satellites/


  *   mass & center of mass history file: swomass.txt
  *   maneuver history file: swoman.txt

  *   attitude history file: swoatt.txt (includes angle values of Solar Pan=
el 1 after rotation; see satellite model description)


Note that SWOT initial values of mass and center of gravity coordinates are=
 added in https://ids-doris.org/documents/BC/satellites/MassCoGInitialValue=
s.txt


Documentation
DORIS satellites models implemented in POE processing by the CNES SOD : htt=
ps://ids-doris.org/documents/BC/satellites/DORISSatelliteModels.pdf (update=
d)
Description of the theoretical attitude laws for the satellites Sentinel-6 =
and Swot : https://ids-doris.org/documents/BC/satellites/SWOTandSentinel6At=
titudeLaws.pdf
Description of the quaternion files for Swot : https://ids-doris.org/docume=
nts/BC/ancillary/quaternions/swot_quaternions_CNES_product_description.pdf

Reference
IDS data structure and formats : https://ids-doris.org/images/documents/Dat=
a-Structure-Formats.pdf


Best regards,
Laurent