PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1999-03-19 NOTE = "MGS RST Instrument Health Report HEA9078A.TXT" END_OBJECT = TEXT END Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 1999-03-17T00:06:21.107 Last SCET: 1999-03-17T17:38:29.100 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 1909 F-0195 HGA_EL_ANG 0 0 0.00E+00 0.00E+00 0.00E+00/0.00E+00 1909 L-0034 MOT1_RANGING 1 1 3820 L-0036 MOT1_TLM_MOD 0 1 3820 L-0037 MOT1_USO_ENA 0 0 3820 L-0044 MOT2_RANGING 0 0 3820 L-0046 MOT2_TLM_MOD 0 0 3820 L-0047 MOT2_USO_ENA 0 0 3820 L-0053 RF_SW_OSC 2 2 3820 L-0060 TWTA1_FILMNT 0 0 3820 L-0061 TWTA1_HV 0 0 3819 L-0070 TWTA2_FILMNT 1 1 3819 L-0071 TWTA2_HV 0 1 3820 L-0080 USO_PWR 0 0 3820 L-0090 KaBLE_STAT 1 1 3820 L-0091 KaBLE_ENABLE 0 0 3819 L-0111 MOT1_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/0.00E+00 3820 L-0121 MOT2_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/1.06E-06 3820 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.82E-02/2.83E-05 3820 L-0132 TWTA1_ANOD_V 0 1 -1.00E+03 -1.00E+03 -1.00E+03/1.74E-02 477 L-0141 TWTA2_HLX_I 17 42 2.86E-01 7.85E-01 3.45E-01/6.05E-04 3820 L-0142 TWTA2_ANOD_V 63 235 -8.62E+02 -5.18E+02 -5.34E+02/1.21E+00 477 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/2.97E-04 476 L-0201 USO_OVEN_V 127 130 2.54E+00 2.60E+00 2.58E+00/4.34E-04 476 T-0302 EPC1_T 157 211 -1.20E+01 1.17E+01 -6.46E+00/2.76E-01 477 T-0303 EPC2_T 142 196 -4.19E+00 1.81E+01 4.63E-01/2.52E-01 477 T-0310 RF_ISOLTR1_T 207 234 -7.39E+00 1.67E+01 -2.74E-01/1.07E-01 3820 T-0311 RF_ISOLTR2_T 203 238 -1.32E+01 1.88E+01 -4.92E+00/1.18E-01 3820 T-0312 TWT1_T 205 232 -4.77E+00 1.78E+01 1.01E+00/2.66E-01 477 T-0313 TWT2_T 195 237 -1.17E+01 2.25E+01 -5.29E+00/3.16E-01 477 T-0315 USO_T 144 149 1.91E+01 2.06E+01 2.01E+01/1.37E-02 477 T-0316 KA_AMP_T 180 211 1.43E+01 2.82E+01 1.77E+01/1.62E-01 479 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 -------- --- -------- -------- ---- ---- ---- ---- ---- ----- ---- ----- 1999/077 45 18:07:00 18:16:00 5000 2000 2 12 1666 2701 0 57.0 1999/077 34 19:22:54 19:29:29 5000 2000 2 12 1666 1980 0 56.7 1999/077 34 20:05:00 20:14:00 5000 2000 2 12 1666 2701 0 55.9 1999/077 34 21:19:00 21:27:00 5000 2000 2 12 1666 2401 0 56.3 1999/077 34 22:02:00 22:11:00 5000 2000 2 12 1666 2701 0 55.3 1999/077 65 23:17:00 23:25:00 5000 2000 2 12 1666 2401 0 55.9 Anomalies --------- Occultation data beginning 18:07 have the usual spectral ripple a couple minutes after egress. Occultation data beginning 23:17 have what appears to be the more complex ripple (see figure attached to yesterday's report - HEA9077A.PS1) now being seen at DSS 65, about 4 minutes before ingress. Analyses -------- Joe Twicken has examined open loop data during GCO and during Fixed HGA Mapping to see whether the much wider temperature swings during the current period have affected signal stability. His report: I have looked at some "before" and "after" data, and it appears that the cooling of the TWTA does not adversely affect the USO stability. I estimated the Allan deviation for the ODR's from occultations 1531e and 1532e, recorded at DSS34 on 1999/055. The SNR in both cases was approximately 57 dB/Hz. There was less than 3 minutes of baseline in each case after the ionosphere was encountered, so there are very few samples from which to estimate the frequency stability (particularly at the longer integration times). I used the spk_i_990222_OD1509-1578_rec_V1 file to steer the data, and the orbit reconstructions were actually pretty good. The results were: t, sec AD 1531e AD 1532e ------- ---------- ---------- 0.4096 4.2919e-13 3.1004e-12 0.8192 2.8288e-13 2.9923e-13 1.6384 2.7867e-13 3.4119e-13 3.2768 2.7672e-13 3.0225e-13 6.5536 3.0345e-13 2.3571e-13 26.2144 4.8763e-13 3.2571e-13 I also estimated the Allan deviation for the ODR's from occultations 0022e and 0023e, recorded at DSS34 on 1999/069. These were recorded after the TWTA temperature began to drop. The SNR was approximately 57-58 dB/Hz. For these egress recordings, there was just over two minutes of useful baseline. I first tried to use the spk_m_990309_OD000-060_rec_V1 file to steer the data, but the trajectory reconstructions were not good enough for Allan deviation calculations at even short integration times. I did steer the data with the gdn_ql10_903061200_903112245.tsp file which we just received today from Goddard. The orbit reconstructions were not particularly good, but they were sufficient to accurately measure Allan deviation at all but the longest one or two integration times. The results were: t, sec AD 0022e AD 0023e ------- ---------- ---------- 0.4096 3.8233e-13 3.8708e-13 0.8192 2.7002e-13 3.1983e-13 1.6384 2.2093e-13 3.0744e-13 3.2768 2.4777e-13 3.3814e-13 6.5536 2.5987e-13 3.8970e-13 26.2144 9.1525e-13 8.9896e-13 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.99-077.out 9075075A.AMD OPT: optg_m_990317_OD107-120_281_V1 9076091A.OPT SAK: mgs_solar_array_1999-076.ck 9076076A.SAK SPK: spk_m_990317_OD107-120_281_V1 9076091A.SPK TCK: mgs_spice_c_kernel_1999-076.ck 9076076A.TCK