PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2004-01-08 NOTE = "MGS RST Instrument Health Report HEA4008A.TXT" END_OBJECT = TEXT END Miscellaneous ============= Update on Computer Compromises ------------------------------ Stanford computers have returned to a state of functionality, if not smooth operation. Virtually all services have been restored on both the Stanford and SOPC/JPL sides; but there is no electronic communication between the two as of this report. Most of the Stanford computers have been upgraded to Solaris 8 as part of the recovery process. Jim Whitman, the JPL SA who maintains our SOPC, advises that there are heightened security concerns around our use of shared disk (Stanford disks with software and data, accessible by the SOPC). At present, communication through the Cisco router that connects the Stanford and SOPC/JPL sides has been blocked; and there appears to be no communication via longer paths, such as through our 56K line to JPL and then out to the Internet and back to Stanford. The latter path has always been very slow, but available. Thus, the only way to transfer information between the SOPC and Stanford computers is on physical media, such as tape and CD. Jim has referred us to Gary Ramah for further discussions; Gary is on travel. Shared disk has been required in the past because we collect data through both the SOPC (open loop RSR data, spacecraft engineering data, DSN monitor data, Earth Orientation Parameter files, JPL documentation, etc.) and our Stanford analysis machine magellan (NAIF files, orbit reconstructions from MGS NAV and from our own Goddard and JPL Gravity Science groups, and other files). As files are acquired, they are logged into a data base, physically connected to magellan but equally accessible from the SOPC. The files themselves eventually migrate to a disk farm on magellan where they can be downloaded by Team Members. The same files are also written to archival CD on the SOPC. Thus there is a significant amount of traffic between Stanford and the SOPC; some files cross the border more than once. Being unable to link the SOPC and Stanford machines is currently the most significant obstacle in returning to normal operations. We are investigating alternative data paths; our acquisition of RSR data reported below is the result of one such experiment. At present, this route is very labor intensive; but with experience we may be able to make it more efficient. In fact, the data transfer itself is much faster; but there are a number of steps where operator intervention is required, and the required shepherding mitigates any savings provided by the higher speed network connection. We will be investigating other possible alternatives over the next few days. MGS Radio Science Team Meeting ------------------------------ Team Leader Tyler confirms that the next Team meeting will be at JPL on 26 January. It is tentatively scheduled for a half day with emphasis on two subjects: synergies between MGS Radio Science and JPL ephemeris development and navigation (Myles Standish) and RST operations status. A meeting at the end of April in conjunction with EGS remains in the plan, but no dates have been selected. More details will follow. Engineering Data ================ No new data. Although queries for both spacecraft engineering data and DSN monitor data have been successful, the processing which follows fails - apparently because the replacement system disk provided by JPL did not include support files, such as for DMD. Karen Liao and Marla Thornton are investigating. Some processing also fails because software on Stanford shared disks cannot be accessed; we are seeking workarounds while the security issues associated with shared disk are evaluated at JPL. Open Loop Data ============== Data Collection --------------- We have transferred the following RSR open loop data to Stanford: YYYY/DDD DSS RSR RSR CH KSPS BT REC RECS RSR MAX START STOP ID RS LEN FILE NAME SNR -------- --- -------- -------- --- -- ---- -- ----- ----- ------------ ----- 2003/347 25 01:43:00 01:55:00 3 1 2 16 8260 721 33470143.RSR 58.7 2003/347 25 01:55:00 03:14:00 4 1 2 16 8260 4741 33470155.RSR 44.9 2003/347 43 03:41:00 03:53:00 1 1 2 16 8260 721 33470341.RSR 62.5 2003/347 43 05:39:00 05:50:00 1 1 2 16 8260 661 33470539.RSR 65.6 2003/347 43 07:36:00 07:48:00 1 1 2 16 8260 721 33470736.RSR 65.8 2003/347 43 08:15:00 09:07:00 2 1 2 16 8260 3121 33470815.RSR 53.1 2003/347 43 09:34:00 09:46:00 1 1 2 16 8260 721 33470934.RSR 65.7 2003/348 14 01:16:00 01:28:00 3 1 2 16 8260 721 33480116.RSR 63.8 2003/348 14 03:14:00 03:26:00 3 1 2 16 8260 721 33480314.RSR 63.7 2003/348 14 05:12:00 05:23:00 3 1 2 16 8260 661 33480512.RSR 63.5 2003/348 43 07:09:00 07:21:00 1 1 2 16 8260 721 33480709.RSR 64.1 2003/348 43 09:07:00 09:19:00 1 1 2 16 8260 721 33480907.RSR 63.7 Anomalies --------- Data beginning at 2003/347-01:55:00 and 2003/347-08:15:00 were collected while the spacecraft was in two-way mode. These were requested for testing software which may be used to analyze occultation data collected in two-way mode. No occultations are included in either recording. Data from occultation 21290e (DSS 43, start time 2003/347-03:41:00) have +/-0.3 dB fluctuations in carrier level after egress. Uplink ramps can be seen in power spectra several minutes after egress on the following occultations: Occultation Start Date/Time DSS ----------- ----------------- --- 21289e 2003/347-01:43:00 25 21304e 2003/348-07:09:00 43 Closed Loop Data ================ Data Collection --------------- No new data. Passwords on the Multi-Mission NAV server OSCARX are being changed. Ancillary Data ============== Data Collection --------------- No new data.