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dorismail               30-Nov-2009 18:48:17 Message No 0629
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Author: Carey Noll <Carey.Noll@nasa.gov>
Subject: Jason-1/-2 quaternion and solar array files


Dear Colleagues,

Please note that new files relative to Jason-1 and -2 attitude files
are now archived in the IDS Data Centers (CDDIS and IGN) and delivered
on a daily basis.

These files are available at the data centers since the launch of each
satellite in the directories:

    pub/doris/ancillary/quaternions/SSS/YYYY

where

    SSS = ja1, ja2
    YYYY = year of the data

Two types of files are available: the first contains the attitude
quaternions of the S/C body, the other contains the solar panel
angular positions. The filename convention is as follows:

    SSSqbodyYYYYMMDDHHMMSS_yyyymmddhhmnss.LLL
    SSSqsolpYYYYMMDDHHMMSS_yyyymmddhhmnss.LLL

where

    SSS = the satellite three-character abbreviation (ja1, ja2)
    qbody or qsolp = fixed part (qbody for body quaternions, qsolp
       for solar panel angular positions)
    YYYY = date: year of first data, MM = date: month of the first
       data, DD = date: day in the month of first data
    HH = time: hour of the first data , MN = time: mn of the first
       data, SS = time: second of the first data
    yyyy = date: year of last data, mm = date: month of the last
       data, dd = date: day in the month of last data
    hh = time: hour of the first data, mn = time: mn of the first
       data, ss = time: second of the first data
    LLL = version number (starting with 001 for the initial version)

Both types of files, body quaternions (qbody) and solar_panel
angular positions (qsolp), will be delivered on a daily basis. Both
files correspond to the same period (28 hours of data, 2 overlapping
hours between 2 consecutive files). Documentation about these new
files are available in the Central Bureau ftp directory:

    ftp.cls.fr/pub/ids/ancillary/quaternions/jason1_2_quaternion_solar_panel.pdf

Please contact the IDS Central Bureau if you have any question about
this information.

Best regards,

Carey Noll, Bruno Garayt, and the IDS Central Bureau
-----
Ms. Carey Noll
Manager, Crustal Dynamics Data Information System (CDDIS)
Secretary, ILRS Central Bureau
NASA GSFC
Code 690.1
Greenbelt, MD 20771
USA

E-mail:  Carey.Noll@nasa.gov
Voice: (301) 614-6542
Fax: (301) 614-6015
WWW:  http://cddis.gsfc.nasa.gov






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