PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1999-05-06 NOTE = "MGS RST Instrument Health Report HEA9126A.TXT" END_OBJECT = TEXT END Miscellaneous ============= Nominal HGA Mapping resumed shortly after 1999/126-00:00:00, but not without some anomalies. See below for details. The MGS DSN schedule for May shows "potential RFI" during DSS 15 tracking on DOY 127, 129, 131, 132, 133, 137, and 141. This is presumably from Goldstone Solar System Radar observations of Mars. Gravity and Atmospheres investigators should take note. Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 1999-05-04T00:08:08.638 Last SCET: 1999-05-04T22:57:16.629 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- F-0190 HGA_AZ_ANG 2968 2968 7.25E-01 7.25E-01 7.25E-01/4.33E-09 1915 F-0195 HGA_EL_ANG -6434 -6434 -1.57E+00 -1.57E+00 -1.57E+00/5.15E-09 1915 L-0034 MOT1_RANGING 0 1 3833 L-0036 MOT1_TLM_MOD 0 1 3832 L-0037 MOT1_USO_ENA 0 0 3833 L-0044 MOT2_RANGING 0 1 3833 L-0046 MOT2_TLM_MOD 0 1 3832 L-0047 MOT2_USO_ENA 0 1 3833 L-0053 RF_SW_OSC 2 2 3832 L-0060 TWTA1_FILMNT 0 0 3833 L-0061 TWTA1_HV 0 0 3834 L-0070 TWTA2_FILMNT 1 1 3834 L-0071 TWTA2_HV 0 1 3833 L-0080 USO_PWR 0 0 3833 L-0090 KaBLE_STAT 1 1 3833 L-0091 KaBLE_ENABLE 0 0 3834 L-0111 MOT1_RCV_AGC 194 255 -1.53E+02 -1.35E+02 -1.53E+02/1.51E-02 3833 L-0121 MOT2_RCV_AGC 138 255 -1.53E+02 -1.18E+02 -1.53E+02/3.00E-02 3833 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.83E-02/1.93E-05 3833 L-0132 TWTA1_ANOD_V 0 1 -1.00E+03 -1.00E+03 -1.00E+03/1.49E-02 476 L-0141 TWTA2_HLX_I 17 42 2.86E-01 7.85E-01 3.77E-01/1.86E-03 3833 L-0142 TWTA2_ANOD_V 62 234 -8.64E+02 -5.20E+02 -5.58E+02/4.04E+00 476 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/2.89E-04 477 L-0201 USO_OVEN_V 127 131 2.54E+00 2.62E+00 2.58E+00/4.08E-04 477 T-0302 EPC1_T 161 210 -1.14E+01 1.01E+01 -5.50E+00/2.95E-01 477 T-0303 EPC2_T 149 197 -4.65E+00 1.51E+01 1.55E-01/2.71E-01 477 T-0310 RF_ISOLTR1_T 212 235 -8.77E+00 1.37E+01 -6.91E-01/1.08E-01 3832 T-0311 RF_ISOLTR2_T 205 238 -1.32E+01 1.78E+01 -4.03E+00/1.35E-01 3832 T-0312 TWT1_T 209 232 -4.77E+00 1.56E+01 1.20E+00/2.73E-01 478 T-0313 TWT2_T 198 237 -1.17E+01 2.12E+01 -3.84E+00/4.09E-01 478 T-0315 USO_T 140 146 2.00E+01 2.17E+01 2.11E+01/1.50E-02 477 T-0316 KA_AMP_T 185 212 1.37E+01 2.64E+01 1.76E+01/1.69E-01 481 L-0200, L-0201, and T-0315 are nominal. Open Loop Data ============== Data Collection --------------- We have transferred the following open loop data to Stanford: YYYY/DDD DSS DSP SAMP BW DSP BIT REC RECS RECS MAX START STOP RATE MODE RESN LEN MSSG SNR -------- --- -------- -------- ---- ---- ---- ---- ---- ----- ---- ----- 1999/125 45 17:20:00 17:30:00 5000 2000 2 12 1666 3001 0 33.4 1999/125 45 18:38:00 18:47:00 5000 2000 2 12 1666 2701 0 56.1 1999/125 65 18:38:00 18:47:00 5000 2000 2 12 1666 2701 0 56.6 1999/125 65 19:17:00 19:27:00 5000 2000 2 12 1666 3001 0 57.3 1999/125 65 20:36:00 20:44:00 5000 2000 2 12 1666 2401 0 57.8 1999/125 65 21:15:00 21:25:00 5000 2000 2 12 1666 3001 0 58.2 1999/125 65 22:34:00 22:42:00 5000 2000 2 12 1666 2401 0 58.0 1999/126 65 01:10:00 01:20:00 5000 2000 2 12 1666 3001 0 -0.4 1999/126 65 02:30:00 02:32:25 5000 2000 2 12 1666 730 0 2.3 1999/126 65 03:08:00 03:18:00 5000 2000 2 12 1666 3001 0 53.7 1999/126 25 05:06:00 05:11:49 5000 2000 2 12 1666 1746 0 54.9 1999/126 25 05:12:26 05:16:00 5000 2000 2 12 1666 1071 0 56.4 1999/126 25 06:25:00 06:34:00 5000 2000 2 12 1666 2701 0 56.5 1999/126 25 07:03:00 07:13:00 5000 2000 2 12 1666 3001 0 56.6 1999/126 25 08:23:00 08:32:00 5000 2000 2 12 1666 2701 0 56.2 1999/126 25 09:01:00 09:11:00 5000 2000 2 12 1666 3001 0 56.9 1999/126 25 10:20:00 10:29:00 5000 2000 2 12 1666 2701 0 55.7 1999/126 25 10:59:00 11:09:00 5000 2000 2 12 1666 3001 0 55.9 Anomalies --------- Joe Twicken has processed data from 1999/095 through 1999/103 and found "sawtooth" problems in data beginning at the following times: 1999/095-15:51:00 1999/102-04:31:00 1999/102-14:19:00 He has seen 5 Hz spurs at -35 to -45 dBc on both sides of the carrier in all data; these presumably result from modulation by the HGA gimbal stepping motor. He also sees weaker 2.5 Hz spurs on either side of the carrier in some data; these are typically 5 dB lower than the 5 Hz spurs. Trish Priest detected a sawtooth problem in real time. She stopped data collection (which began 1999/126-05:06:00) and restarted the DSP at 1999/126-05:12:26. The two files above cover the same event. Egress is in the middle of the first file. Data beginning 1999/125-17:20:00 are hopelessly corrupted by signals sweeping through the passband. Symptoms are the same as seen in data beginning 1999/124-17:48:00 (see HEA9125A.TXT) which were also obtained using DSP-2 and DSS 45. DSS 45 data beginning at 1999/125-18:38:00 were collected using DSP-1 and seem OK. Note that data beginning 1999/125-18:38:00 were collected at both DSS 45 and DSS 65. The amplitude baseline at DSS 45 is much better, but DSN tuning predicts were used so the carrier drifts +/-50 Hz. DSS 65 carrier drifts less, but the pre-ingress carrier amplitude wanders +/-0.5 dB. Data beginning 1999/125-22:34:00 do not include an occultation. The HGA turned from Earth point before ingress. Data beginning 1999/126-01:10:00 contain only noise. The spacecraft was not yet in nominal Mapping configuration and the HGA was not pointed toward Earth. Data beginning 1999/126-02:30:00 also contained only noise. In this case, the spacecraft was in its nominal Mapping mode except that the spacecraft transmitter was referenced to the AUX OSC rather than the USO and the signal fell outside the open-loop receiving window. The 8-minute recording period yielded at least two separate files when retrieved from Mgs_CDR_QueryServer. We opted not to include either in our collection. Data beginning at 1999/126-03:08:00 also have the spacecraft on the AUX OSC; frequency offsets were entered, but the signal was not placed in the open loop bandpass until a couple minutes after egress. Data beginning 1999/126-04:15:00 appear to have been lost. Although the spacecraft was back on the USO, the ground configuration had not returned to normal. Because of an operations error, the data may not have been routed to the SCP. Trish Priest will check whether they can be recovered from disk at SPC 10. There was no backup tape running. There is structure (at levels approaching +/-0.5 dB) in the amplitude baseline both before ingress and after egress in data collected after 1999/126-06:25:00. The structure is more pronounced near ingress and occurs 1-3 minutes before occultation. On egress, signal strength simply rises for several minutes after the occultation. There are only a few weak surface echoes visible in these data. Closed Loop Data ================ Data Collection --------------- We have obtained the following files from OSCAR and EPIC: Original File Name Name on SOPC -------------------------------- ------------ ODF: 99124O125_10S.SJO;1 9124124A.ODF Ancillary Data ============== Data Collection --------------- We have obtained the following files from the FIS: Original File Name Name on SOPC -------------------------------- ------------ AMD: amdgen.99-125.out 9124124A.AMD SAK: mgs_solar_array_1999-124.ck 9124124A.SAK TCK: mgs_spice_c_kernel_1999-124.ck 9124124A.TCK SOE: mm002b.03.tsoe 9126135D.SOE We have obtained the following files from NAIF: Original File Name Name on SOPC -------------------------------- ------------ AGK: mgs_hga_ck_1999-05-04.bc 9124124A.AGK