TO:  SOHO Teams
FROM:  SOHO Science Operations Coordinators and the ECS Staff 

This memo provides a check list for a remote experimenter to follow
when checking that telemetry is properly received during hours when 
the ECS office is not staffed (see SOHO schedule for coverage).  
 
1) Check the SOHO Daily Operations Schedule to see if a DSN station
   handover is taking place.  At these times you can expect to see some
   minor losses in telemetry.

2) One can remotely check that ECS is properly receiving telemetry from
   a "dumb" terminal without X-windows capability as follows:

   a) FTP to the soc machine, and login as mdi.

   b) Change directories to the MDI VC01 data, then check the date and
      modification times on the current "SDU" file -- this file is
      where the incoming telemetry is written into.  This file will later
      be reformatted into the .REL files you usually see.

        ftp> cd tlm_files/MDISC
        250 CWD command successful.

        ftp> dir *SDU
        200 PORT command successful.
        150 Opening ASCII mode data connection for /bin/ls.
        -rw-rw-r--   1 100      2875392 Jun 18 19:03 MDISC_960618_175022.SDU
        226 Transfer complete.

     Now, wait a minute or so and type the same command again:

        ftp> dir *SDU
        200 PORT command successful.
        150 Opening ASCII mode data connection for /bin/ls.
        -rw-rw-r--   1 100      2883584 Jun 18 19:04 MDISC_960618_175022.SDU
        226 Transfer complete.

     As you can see in the above example, the file size increased and 
     the modification time was updated -- so the ECS is getting telemetry
     for this particular APID.  If you wanted to check if other APID's 
     are received by the ECS, you could do the above with
     one of the other directories (instead of MDISC): 

        AOCHK1     CDSSCL     ELAHK1     GOLHK      OBT        SVMHK3     UVCSSC
        AOCHK2     CDSSCM     ELAHK2     GOLSC      SUMHK      SVMHK4     VIRHK
        ATTIT1     CELHK      ELAHK3     MDIHK1     SUMSCH     SW         VIRSC
        ATTIT2     CELSC1     ELASCH     MDIHK2     SUMSCL     SWAHK      
        CDSHK      CEPHK      ELASCL     MDIHR      SVMHK1     SWASC      
        CDSSCH     CEPSC      EXPHK      MDISC      SVMHK2     UVCHK      
        Note that MDISC is the MDI 5K science data (VC1) and MDIHR is
        the MDI-M data (VC2).
     
2) From the above example, we checked if the ECS is receiving telemetry.  

   If the ECS is receiving telemetry data and the MDI workstation is not,
   then it is a local MDI problem, contact a local MDI representative.

   However, if the ECS is not receiving telemetry FOR SEVERAL APIDS, then
   the problem may be with PACOR and do the following in order:

      a) Call PACOR (286-3080), PACOR will only be able to tell you if they
         are sending data to the ECS.  PACOR is staffed 24 hrs a day.
         (However, PACOR will NOT be able to tell you if the ECS is 
          receiving the data properly).

         Note:  There are two streams of telemetry data from JPL to GSFC.  
                One is sent to the FOT and the other is sent to PACOR.
                PACOR sends telemetry to the ECS, which in turn 
                sends it to the experimenters.  So therefore, it is
                entirely possible for the FOT to see telemetry data and
                not realize the instrument teams are not getting the data
                because of the different source.  The FOT does not get
                its data from PACOR but the instrumenters do.
 
      b) If PACOR says they are sending data to the ECS and no other
         teams are receiving telemetry data, then call a SOC.
         (See last week's weekly meeting minutes for phone numbers).

	 It has been suggested that a member of the FOT could check 
         on the ECS system at odd hours.  However, at the present time,
         the FOT has not been trained to do so. Therefore, call a SOC.

We hope this clarifies matters for you.  If you have any further 
questions, comments, let us know.        
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