Subject: [SLR-Mail] No. 903: Preliminary Orbit Prediction Products GRACE
From: R. Schmidt, R.Koenig, GFZ Potsdam <Roland Schmidt <rschmidt@gfz-potsdam.de>>

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SLR Electronic Mail          2002-02-22 16:42:00 UTC           Message No. 903 
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Author: R. Schmidt, R.Koenig, GFZ Potsdam
Subject: Preliminary Orbit Prediction Products GRACE

Dear colleagues,

 today preliminary orbit prediction products for the GRACE satellites
 have been distributed to the ftp sites at CDDIS, EDC and GFZ and via 
 email to the ILRS stations. The orbit prediction products are based 
 on the nominal separation information for the target launch date, 
 March 16th 2002, 09:23 UTC. It is planned to deliver an updated version
 of these products few days prior to launch.

 Please note the following additional information to SLRMAIL No.899

 o The access to the ftp-site at GFZ is as follows:

    server: ftp.gfz-potsdam.de
      user: anonymous
    passwd: your email-address

       dir: pub/grace/graceA/slr -> GRACE-A
            pub/grace/graceB/slr -> GRACE-B

     files: [graceA|graceB]_irvs_yymmdd_c.gfz -> IRVs
            [graceA|graceB]_drag_yymmdd_c.gfz -> DRAG
            [graceA|graceB]_sao_yymmdd_c.gfz  -> SAO
            [graceA|graceB]_tle_yymmdd_c.gfz  -> TLE
 
   Above file naming convention is also valid for the products stored at
   CDDIS and EDC.

 o In the product files the &#180;DSIDP&#180; record is

    DSIDP GRCA.ORB.PRD -> GRACE-A
    DSIDP GRCB.ORB.PRD -> GRACE-B

 In case of any questions and/or suggestions please feel free to contact 
 us under

        rschmidt@gfz-potsdam.de

Best regards
R. Schmidt
R. Koenig, Laser Tracking System Manager

From: Roland Schmidt <rschmidt@gfz-potsdam.de> 

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