PDS_VERSION = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1997-07-10 NOTE = "MGS RST Instrument Health Report HEA7191A.TXT" END_OBJECT = TEXT END Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 1997-07-09T00:00:00.493 Last SCET: 1997-07-09T23:59:59.987 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- L-0034 MOT1_RANGING 0 0 26402 L-0036 MOT1_TLM_MOD 0 0 26402 L-0037 MOT1_USO_ENA 0 0 26402 L-0044 MOT2_RANGING 1 1 26402 L-0046 MOT2_TLM_MOD 1 1 26402 L-0047 MOT2_USO_ENA 1 1 26402 L-0053 RF_SW_OSC 1 1 26402 L-0060 TWTA1_FILMNT 0 0 26402 L-0061 TWTA1_HV 0 0 26402 L-0070 TWTA2_FILMNT 1 1 26402 L-0071 TWTA2_HV 0 0 26402 L-0080 USO_PWR 0 0 26402 L-0090 KaBLE_STAT 1 1 26402 L-0091 KaBLE_ENABLE 0 0 26402 L-0111 MOT1_RCV_AGC 200 255 -1.53E+02 -1.37E+02 -1.43E+02/3.24E-02 13201 L-0121 MOT2_RCV_AGC 150 255 -1.53E+02 -1.23E+02 -1.30E+02/4.99E-02 13201 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.83E-02/8.62E-06 13201 L-0132 TWTA1_ANOD_V 0 2 -1.00E+03 -1.00E+03 -1.00E+03/2.57E-03 13201 L-0141 TWTA2_HLX_I 39 43 7.25E-01 8.05E-01 7.65E-01/1.21E-04 13201 L-0142 TWTA2_ANOD_V 60 64 -8.68E+02 -8.60E+02 -8.63E+02/1.20E-02 13201 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/7.21E-05 13201 L-0201 USO_OVEN_V 123 126 2.46E+00 2.52E+00 2.50E+00/5.75E-05 13201 T-0302 EPC1_T 119 132 2.24E+01 2.81E+01 2.63E+01/2.19E-02 3299 T-0303 EPC2_T 106 119 2.81E+01 3.37E+01 3.16E+01/2.21E-02 3299 T-0310 RF_ISOLTR1_T 178 190 2.46E+01 2.89E+01 2.75E+01/8.76E-03 13201 T-0311 RF_ISOLTR2_T 169 181 2.79E+01 3.21E+01 3.05E+01/8.24E-03 13201 T-0312 TWT1_T 176 189 2.49E+01 2.96E+01 2.79E+01/1.68E-02 3299 T-0313 TWT2_T 162 175 3.00E+01 3.45E+01 3.29E+01/1.72E-02 3299 T-0315 USO_T 171 175 1.15E+01 1.27E+01 1.20E+01/3.44E-03 3299 T-0316 KA_AMP_T 147 160 3.52E+01 4.01E+01 3.81E+01/1.25E-02 6600 L-0200, L-0201, and T-0315 are nominal. Open Loop Data ============== Data Collection --------------- All data from RS ORT #1 were in the NERT Cache this morning. The first entry in the table below is an ad hoc one-way observation with telemetry ON. The other 4 are simulated occultations with telemetry OFF, alternating between simulated "ingress" and simulated "egress." The last repeats a transmission which we obtained immediately after the test, but it omits the TWTA warm-up period (see HEA7189A.TXT). YYYY/DDD DSS DSP SAMP BW DSP BIT TRK REC RECS RECS FIRST START STOP RATE MODE RESN MODE LEN MSSG SNR -------- --- -------- -------- ---- ---- ---- ---- ---- ---- ----- ---- ----- 1997/189 65 13:23:00 13:33:00 5000 2500 2 12 1-W 1666 3000 0 ~44. 1997/189 65 14:10:00 14:20:00 5000 2500 2 12 1-W 1666 3000 0 ~52. 1997/189 65 15:10:00 15:20:00 5000 2500 2 12 1-W 1666 3000 0 ~52. 1997/189 65 16:20:00 16:30:00 5000 2500 2 12 1-W 1666 3000 0 ~52. 1997/189 65 17:20:00 17:30:00 5000 2500 2 12 1-W 1666 3000 0 ~51. Anomalies --------- 650 Hz spurs on either side of the carrier are visible in the first data set; they and other frequency artifacts are absent in the other four. Carrier amplitude is about 6.5 dB lower with telemetry ON. Amplitude oscillations during the 10-minute tests were limited to about +/-0.1 dB. Fluctuations on time scales of a few seconds to a minute were about half that, and variations between runs (one hour separations) were about double (+/-0.2 dB). Analyses -------- Joe Twicken has completed his analysis of these data on the SOPC. Portions of his report are reproduced below: All of the open-loop data segments were fully processed with a single execution of a Unix shell script. This was the first chance that we have had to process multiple MGS open-loop recordings. The processing went very well, beginning today at 11:41 and concluding at 13:44. All files for processing the multiple open-loop segments were recorded in the MgsDB database. All POCA files were fixed automatically with the "salvagePoca" program. I used the spk_c_970321-970827 SP-kernel file to steer the data. This file was created on 97/168. I estimated the USO frequency during the middle of the test period to be 8423152955.5 Hz. With recordings on three days over the last month, it is now evident that the USO frequency drift rate has changed significantly since the time before MGS went into safe mode. The drift rate since 97/162 is approximately 0.172 Hz/day. Prior to entering safe mode, the USO drift rate was over 0.25 Hz/day. We have updated our USO model file to reflect this change in USO drift rate. At an integration time of 26.2 seconds, the Allan deviation during each of the four simulated occultations was in the range of 1.1e-13 to 2.0e-13. Closed Loop Data ================ Data Collection --------------- We have obtained the following files from OSCAR and EPIC: Original File Name Name on SOPC ------------------------------ ------------ ATDF: ODF: 97189C190.DAT;1 7189190A.ODF 97190C191.DAT;1 7190191A.ODF IONCAL: TROPCAL: WEATHER: UTPM: EOP: 970708-eop.long 20207224.EOP 970708-eop.short 62247224.EOP Ancillary Data ============== Data Collection --------------- We have obtained the following files from the CDB: Original File Name Name on SOPC ------------------------------ ------------ AMD: amdgen.P034.out 7190190A.AMD SCK: MGS_SCLKSCET.00012.tsc 6310176A.SCK