PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1999-03-12 NOTE = "MGS RST Instrument Health Report HEA9071A.TXT" END_OBJECT = TEXT END Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 1999-03-10T00:48:45.173 Last SCET: 1999-03-10T17:38:29.166 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- F-0190 HGA_AZ_ANG 0 0 0.00E+00 0.00E+00 0.00E+00/0.00E+00 1877 F-0195 HGA_EL_ANG 0 0 0.00E+00 0.00E+00 0.00E+00/0.00E+00 1877 L-0034 MOT1_RANGING 0 1 3758 L-0036 MOT1_TLM_MOD 0 1 3758 L-0037 MOT1_USO_ENA 0 0 3758 L-0044 MOT2_RANGING 0 1 3758 L-0046 MOT2_TLM_MOD 0 1 3758 L-0047 MOT2_USO_ENA 0 1 3758 L-0053 RF_SW_OSC 2 2 3758 L-0060 TWTA1_FILMNT 0 0 3758 L-0061 TWTA1_HV 0 0 3758 L-0070 TWTA2_FILMNT 1 1 3758 L-0071 TWTA2_HV 0 1 3758 L-0080 USO_PWR 0 0 3758 L-0090 KaBLE_STAT 1 1 3758 L-0091 KaBLE_ENABLE 0 0 3758 L-0111 MOT1_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/0.00E+00 3758 L-0121 MOT2_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/1.06E-06 3758 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.82E-02/2.58E-05 3758 L-0132 TWTA1_ANOD_V 0 1 -1.00E+03 -1.00E+03 -1.00E+03/1.52E-02 469 L-0141 TWTA2_HLX_I 17 42 2.86E-01 7.85E-01 3.60E-01/1.39E-03 3758 L-0142 TWTA2_ANOD_V 63 235 -8.62E+02 -5.18E+02 -5.45E+02/3.01E+00 469 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/2.89E-04 469 L-0201 USO_OVEN_V 127 130 2.54E+00 2.60E+00 2.57E+00/4.54E-04 469 T-0302 EPC1_T 157 211 -1.20E+01 1.17E+01 -5.61E+00/3.13E-01 469 T-0303 EPC2_T 142 196 -4.19E+00 1.81E+01 1.32E+00/2.93E-01 469 T-0310 RF_ISOLTR1_T 206 235 -8.77E+00 1.73E+01 5.53E-01/1.18E-01 3758 T-0311 RF_ISOLTR2_T 202 238 -1.32E+01 1.93E+01 -3.84E+00/1.37E-01 3758 T-0312 TWT1_T 205 232 -4.77E+00 1.78E+01 1.77E+00/3.06E-01 470 T-0313 TWT2_T 194 237 -1.17E+01 2.29E+01 -4.12E+00/3.95E-01 470 T-0315 USO_T 144 151 1.86E+01 2.06E+01 2.01E+01/1.51E-02 469 T-0316 KA_AMP_T 179 211 1.43E+01 2.86E+01 1.82E+01/1.85E-01 470 Huge thermal transients have appeared in many of the spacecraft engineering channels, roughly correlated with changes to/from ANS (playback to Earth) and nadir-pointed mapping. These presumably result from differences in spacecraft orientation and changes in some system operations between the two states. For example, the TWT2 temperature was almost 23C when the spacecraft resumed nadir pointing on 1999-03-10 (T-0313, EU-HI) while it dropped to -11.7C before the beginning of playback (T-0313, EU-LO). Insolation oscillations of about +/-1C are superimposed, but easily discernible until about half way through the nadir mapping. USO temperature appears to be inversely correlated with the others. At the beginning of nadir pointing, the USO temperature is at its LOWEST value (approximately 18.6C). It then rises over about 3 hours to a value of about 20.5C which it holds until the beginning of playback. Insolation cycling is a few tenths of 1C. This is the first day we have seen this behavior. 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 -------- --- -------- -------- ---- ---- ---- ---- ---- ----- ---- ----- 1999/070 45 17:28:00 17:36:00 5000 2000 2 12 1666 2401 0 55.9 1999/070 45 18:43:00 18:50:00 5000 2000 2 12 1666 2101 0 57.2 1999/070 45 19:26:00 19:34:00 5000 2000 2 12 1666 2401 0 56.9 1999/070 45 20:41:00 20:48:00 5000 2000 2 12 1666 2101 0 56.9 1999/070 45 21:24:00 21:31:00 5000 2000 2 12 1666 2101 0 56.1 1999/070 45 22:38:00 22:45:00 5000 2000 2 12 1666 2101 0 56.5 1999/070 45 23:21:00 23:28:00 5000 2000 2 12 1666 2101 0 3.8 Anomalies --------- The first occultation has spectral ripples; this is illustrated in the attached figure (HEA9071A.PS1). See caption below for details. The third occultation has a transient, drifting signal with different properties. We have not had time to investigate this in detail; at first glance, it is considerably more complex than the "ripple". The fifth occultation has spectral ripples. The seventh occultation was done using the LGA. It may have occurred during a maneuver. We have not detected a signal. Occultations 2-6 have clear surface echoes. Closed Loop Data ================ Data Collection --------------- No new data. Ancillary Data ============== Data Collection --------------- We have obtained the following files from the FIS: Original File Name Name on SOPC -------------------------------- ------------ AMD: amdgen.99-070.out 9068068A.AMD OPT: optg_m_990304-991014_V1 9063287A.OPT OPT: optg_m_990309_OD009-035_207_V1 9068085A.OPT SAK: mgs_solar_array_1999-069.ck 9069069A.SAK SPK: spk_m_990304-991014_V1 9063287A.SPK SPK: spk_m_990309_OD009-035_207_V1 9068085A.SPK TCK: mgs_spice_c_kernel_1999-069.ck 9069069A.TCK The first OPTG and the first SPK are prediction files from the beginning of Mapping to mid-October. The OPTG is 8 MB and the SPK is 177 MB. We will leave these on our server for a short time, then remove them to keep disk space free for reconstructions. Figure Caption ============== HEA9071A.PS1: Anomalous signal apparently merges with carrier from both high and low sides at about 1999/070-17:32:50 (approximately 100 s after occultation egress). Similar features have been seen after 3 of the other 8 egress occultations captured since beginning of Fixed HGA Mapping. No anomaly has been seen in connection with an ingress event. Plots here are of 1 s average power spectra (averages of 5 raw spectra). Carrier is fixed in bin 268 (512 point spectra corresponding to 2500 Hz bandwidth); carrier SNR is about 62 dB/Hz. Transient is 2-3 dB above average noise in raw (0.2 s) spectra, spread over about 50 Hz, and drifting about 280 Hz/s. Data were collected at DSS 45. Figures ======= Plot(s) illustrate some of the points made in the text. Each plot is a PostScript file, created and printable on our SOPC. For report text file HEAydddC.TXT Figure N will be labeled HEAydddC.PSN and sent as the N+1st e-mail message of a set. We assume that you can strip off the e-mail headers and either display or print copies of the figures on a machine in your area. People who have indicated that they cannot handle these files by e-mail are not included in the e-mail distribution of figures.