February 1993

1st  Feb          BAM-I Matrix 0 command.
                  KEP EPAC IFC.

2nd  Feb          HET Calibration.
                  KEP RAM dump.
                  Earth pointing manoeuvre.

3rd  Feb          HET reset.

4th  Feb          Earth pointing manoeuvre.

5th  Feb          Routine operations.

036.06:40-06:45   DSS 12 receiver exciter problem.  5 min data loss.
SCET

6th  Feb          Earth pointing manoeuvre.

7th  Feb          Routine operations.

8th  Feb          KEP EPAC IFC.
                  Transmitter failure at DSS12 due to moisture in waveguide.
                  STO Daily Sequence #1 and #2 could not be transmitted.

9th  Feb          Earth pointing manoeuvre.
                  DSU2 tape length test.

10th Feb          HED calibration.

11th Feb          Earth pointing manoeuvre.

12th Feb          Routine operations.

13th Feb          Routine operations.

14th Feb          Earth pointing manoeuvre.

045.00:15:57SCET  DNEL (Disconnect Non Essential Loads) occurred on board the
                  spacecraft.  This coincided with the end of the planned 
                  routine Earth pointing manoeuvre.  The last
                  frame of telemetry was received at 045.00:19:09SCET.
                  Telemetry was switched on again at 044.05:25:16SCET.  All
                  experiment teams should examine their data for any unusual
                  behaviour in the moments up to the DNEL.

                  The Recovery from DNEL procedure is being implemented and
                  no problems have been experienced thus far.  Individual
                  experiment teams will be contacted to ascertain the desired
                  switch on configuration.

045.00:19-05:25   Loss of 5h10m of realtime data due to DNEL.
SCET

044.12:55-17:13   Since the DNEL occurred during playback an additional
SCET              4h18m of playback data was lost.

15th Feb          Recovery from DNEL.

16th Feb          Earth pointing manoeuvre.
                  Recovery from DNEL.

17th Feb          Routine operations.

18th Feb          Earth pointing manoeuvre.
                  GLG PAPS Level 3.

19th Feb          Routine operations.

20th Feb          GAS Monthly health check.
                  
21st Feb          Earth pointing manoeuvre.

22nd Feb          KEP IFC.

23rd Feb          Earth pointing manoeuvre.

24th Feb          HED calibration.   

25th Feb          Earth pointing manoeuvre.
                  Routine Tape recorder switchover - DSU2 to DSU1.

26th Feb          Routine operations.

27th Feb          Earth pointing manoeuvre.

                  STO Daily command sequences delayed by 4.5 hours due to
                  commanding problem at DSS 61.  Both sequences retransmitted
                  successfully via DSS12 and onboard at 060.04:04 and 05:04
                  SCET.

28th Feb          Routine operations.