****************************************************************************** BSW Electronic Mail 22-Sep-1999 13:35:05 CET Message Number 0076 ****************************************************************************** Author: Mark Greaves Subject: ORBGEN problems Dear Colleagues, I am hoping for some advice on a problem I am experiencing. When I run ORBGEN to generate a standard orbit from a tabular orbit = file the end time of the arc definition displayed in the panel = U:\WORK\SCRATCH.PAN is incorrect. An example is given below :- =C9=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD =CD=CD=CD=BB=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD=CD=CD=CD=CD=BB =BA STD.ORBIT: ARC DEFINITION =BA KEYWORDS =BA =C7=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4= =C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4= =C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4=C4= =C4=C4=C4=C4 =C4=C4=C4=B6=C4=C5=C4=C4=C4=C4=C4=C4=C4=C4=C5=C4=C4=C4=C4=C4=C4=C4=C4=C5= =C4=C4=C4=C4=C4=C4=C4=C4=B6 =BA =BA =BA =BA Start Start Time End Time =BA =BA =BA Arc Tab.File yyyy mm dd hh mm ss yyyy mm dd hh mm = ss =BA =BA =BA =BA =BA =BA 01 > 01 < > 1999 02 08 00 00 00 < > 2167 08 01 23 59 = 59 < =BA TABFIL STARTTIM ENDTIM =BA =BA =BA =BA =C8=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD =CD=CD=CD=BC=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD=CD= =CD=CD=CD=CD=CD=CD=CD=CD=BC The above example is from a tabular orbit file for 08-FEB-1999, = produced from the IGS precise ephemeris IGS09961.SP3 and using the IGS ERP file IGS09967.ERP. As input only one tabular orbit file was chosen (IGS09961.TAB). As you = can see the start time is correct but the end time is very incorrect! This error occurs with both IGS and CODE orbits. I have checked the = tabular orbit file header and the dates and times seem to be OK e.g. (from IGS09961.TAB) :- TABULAR EPHEMERIS DERIVED FROM PREC. EPH: PR1999. 39 SYSTEM J2000.0 2 8 1999 0.000000000000E+00 0.000000000000E+00 = 0.000000000000E+00 2 8 1999 0.230000000000E+02 0.450000000000E+02 = 0.209540641867E-06 0.900000000000E+03 96 0.677067736931E+00 0.986749971297E-01 = 0.252329992660E+00 When using Bernese Software in interactive mode this error is not too = much of a problem because I can manually amend the end time to be the = correct value (in the case of the example =3D 1999 02 08 23 59 59). When using Bernese Software in automatic mode the is no opportunity to change the value and ORBGEN crashes with the following error :- *** SR MOSUPN: TOO MANY DATA POINTS OF SUN/MOON TABLE NUMBER OF POINTS RTEQUESTED :***** MAX. NUMBER OF POINTS ALLOWED: 1000 I therefore have to generate standard orbits manually before going back = to automatic mode to continue the processing. Any suggestions that will help me correct this problem would be greatly appreciated. Thank you in advance for any replies that I may receive. Best Regards. Mark. ******************************************************************** | mgreaves@ordsvy.gov.uk | Mark Greaves, Geodetic Analyst | | Tel : + 44 (0)23 80 79 24 21 | Room C510, Ordnance Survey, | | Fax : + 44 (0)23 80 79 26 87 | Romsey Road, SOUTHAMPTON, | | Mobile : + 44 (0)77 71 83 33 55 | SO16 4GU, UNITED KINGDOM | ******************************************************************** [Mailed from: "Greaves, Mark" ]