PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2003-06-04 NOTE = "MGS RST Instrument Health Report HEA3155A.TXT" END_OBJECT = TEXT END Miscellaneous ============= On 2003/146 the Goldstone Solar System Radar (GSSR) was operated during an MGS pass -- a compatability test in preparation for later Mars radar experiments which will be conducted in parallel with MGS tracking. Dick Simpson has looked at the occultation data collected during the test. His (slightly edited) report follows. There has been no examination of closed loop data. Albert Haldemann's GSSR (DSS 14) transmitter times on 2003/146 are in the left two columns. MGS Radio Science open-loop (occultation) recording times are in the right two columns. Note that we collected data using both DSS 15 and DSS 25. TX ON TX OFF MGS-RS @ DSS 15 MGS-RS @ DSS 25 ------ ------ ----------------- ----------------- 101534 102846 1043 1046 1048 1056 10:54:00-11:03:00 10:54:00-11:03:00 105618 110930 113331 114643 121028 122340 122804 123231 123652 124116 124540 125040 125428 125852 12:51:00-13:01:00 12:51:00-13:01:00 130316 130740 131204 131628 132052 132516 132940 133404 133828 134252 13:36:00-13:46:00 134716 135140 135604 140028 140452 140916 141340 141804 142228 142652 The DSS 25 data appear normal. DSS 15 has had severe interference previously during GSSR transmissions, but the results on day 146 are ambiguous. Levels to the A/D converters were set too high, so there is significant clipping when the MGS spacecraft signal was present. The clipping occurred regardless of whether GSSR was transmitting. 10:54:00-11:03:00: There were irregularities in the noise baseline; these were present before acquisition (10:54-10:55) when GSSR was transmitting and also after MGS went into occultation (11:00-11:03) when GSSR was off. 12:51:00-13:01:00: There were irregularities in the (saturated) carrier level before occultation and in the noise level for a short time after; the total 'irregular' interval was 12:54:36-12:58:52. This matches almost exactly the GSSR ON time. During the rest of the recording, the signal and noise levels were stable. I think the bottom line is that the DSS 25 test shows no impact from GSSR operation. There is PROBABLY some overloading of the front end at DSS 15 - causing the variable signal and noise levels. But the fact that this could be shown during only one of the recording sessions is puzzling. I would recommend not trying to use DSS 15 in parallel with GSSR; but I think we knew this already. DSS 25 looks like a good pairing for GSSR. Engineering Data ================ Engineering Data Statistical Summary from CSV2STAT: First SCET: 2003-06-02T00:00:02.537 Last SCET: 2003-06-02T23:59:54.523 CHANNL CHANNEL TITLE DN-LO DN-HI EU-LO EU-HI EU-AVG/STDEV RECDS ------ ------------- ----- ----- --------- --------- ---------/-------- ----- F-0190 HGA_AZ_ANG 6424 12699 1.57E+00 3.10E+00 2.90E+00/9.18E-03 2689 F-0195 HGA_EL_ANG -11233 11089 -2.74E+00 2.71E+00 -7.65E-01/3.23E-02 2689 L-0034 MOT1_RANGING 0 0 5386 L-0036 MOT1_TLM_MOD 0 0 5387 L-0037 MOT1_USO_ENA 0 0 5386 L-0044 MOT2_RANGING 1 1 5386 L-0046 MOT2_TLM_MOD 0 1 5387 L-0047 MOT2_USO_ENA 1 1 5386 L-0053 RF_SW_OSC 2 2 5387 L-0060 TWTA1_FILMNT 0 0 5386 L-0061 TWTA1_HV 0 0 5387 L-0070 TWTA2_FILMNT 0 1 5387 L-0071 TWTA2_HV 0 1 5386 L-0080 USO_PWR 0 0 5386 L-0090 KaBLE_STAT 0 0 5386 L-0091 KaBLE_ENABLE 1 1 5387 L-0111 MOT1_RCV_AGC 255 255 -1.53E+02 -1.53E+02 -1.53E+02/8.17E-07 5386 L-0121 MOT2_RCV_AGC 123 255 -1.53E+02 -1.12E+02 -1.50E+02/1.16E-01 5386 L-0131 TWTA1_HLX_I 0 1 -3.84E-02 -1.85E-02 -3.82E-02/2.54E-05 5386 L-0132 TWTA1_ANOD_V 0 1 -1.00E+03 -1.00E+03 -1.00E+03/1.62E-02 673 L-0141 TWTA2_HLX_I 17 43 2.86E-01 8.05E-01 4.85E-01/2.69E-03 5386 L-0142 TWTA2_ANOD_V 62 229 -8.64E+02 -5.30E+02 -6.46E+02/5.98E+00 673 L-0200 USO_REG_V 203 205 4.06E+00 4.10E+00 4.08E+00/2.25E-04 674 L-0201 USO_OVEN_V 129 132 2.58E+00 2.64E+00 2.60E+00/3.14E-04 674 T-0302 EPC1_T 187 197 -4.65E+00 -3.25E-01 -2.58E+00/4.18E-02 673 T-0303 EPC2_T 181 192 -2.43E+00 2.11E+00 -6.39E-01/4.84E-02 673 T-0310 RF_ISOLTR1_T 229 233 -6.05E+00 -1.15E+00 -3.23E+00/8.77E-03 5387 T-0311 RF_ISOLTR2_T 224 233 -6.05E+00 4.11E+00 -9.65E-01/2.99E-02 5387 T-0312 TWT1_T 227 232 -4.77E+00 1.06E+00 -2.10E+00/3.57E-02 673 T-0313 TWT2_T 218 233 -6.05E+00 9.37E+00 1.53E-01/1.81E-01 673 T-0315 USO_T 134 137 2.26E+01 2.35E+01 2.29E+01/8.29E-03 673 T-0316 KA_AMP_T 215 219 8.56E+00 1.16E+01 9.98E+00/2.45E-02 673 L-0200, L-0201, and T-0315 are nominal. 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 -------- --- -------- -------- --- -- ---- -- ----- ----- ------------ ----- 2003/153 25 09:37:00 09:47:00 3 1 2 16 8260 601 31530937.RSR 57.2 2003/153 25 11:35:00 11:45:00 3 1 2 16 8260 601 31531135.RSR 57.6 2003/153 25 13:33:00 13:42:00 3 1 2 16 8260 541 31531333.RSR 58.5 2003/153 25 15:30:00 15:40:00 3 1 2 16 8260 601 31531530.RSR 58.6 2003/154 63 03:17:00 03:26:00 3 1 2 16 8260 541 31540317.RSR 63.9 2003/154 63 05:14:00 05:24:00 3 1 2 16 8260 601 31540514.RSR 64.6 2003/154 63 07:12:00 07:22:00 3 1 2 16 8260 601 31540712.RSR 64.4 2003/154 63 09:09:00 09:19:00 3 1 2 16 8260 601 31540909.RSR 62.8 2003/154 25 09:09:00 09:19:00 3 1 2 16 8260 601 3154090J.RSR 57.3 2003/154 25 11:07:00 11:17:00 3 1 2 16 8260 601 31541107.RSR 57.6 2003/154 25 13:05:00 13:15:00 3 1 2 16 8260 601 31541305.RSR 58.6 2003/154 25 15:03:00 15:12:00 3 1 2 16 8260 541 31541503.RSR 59.0 2003/154 25 17:00:00 17:10:00 3 1 2 16 8260 601 31541700.RSR 57.8 Anomalies --------- The following occultations had low ADC input: Occultation Start Date/Time DSS Comments ----------- ----------------- ----- -------------------------- 18919i 2003/153-09:37:00 25 ADC in -2 dB 18920i 2003/153-11:35:00 25 ADC in -1.5 dB 18928i 2003/154-03:17:00 63 ADC in -2.5 dB 18929i 2003/154-05:14:00 63 ADC in -1 dB 18930i 2003/154-07:12:00 63 ADC in -1.5 dB 18931i 2003/154-09:09:00 63 ADC in -4 dB 18931i 2003/154-09:09:00 25 ADC in -2 dB 18932i 2003/154-11:07:00 25 ADC in -1.5 dB 18935i 2003/154-17:00:00 25 ADC in -1 dB The following occultations had small random fluctuations in the free-space carrier amplitude: Occultation Start Date/Time DSS Comments ----------- ----------------- ----- -------------------------- 18931i 2003/154-09:09:00 63 +/-0.5 dB bline 18931i 2003/154-09:09:00 25 +0.5 dB bline bump The following occultations had frequency spurs around the carrier frequency: Occultation Start Date/Time DSS Comments ----------- ----------------- ----- -------------------------- 18928i 2003/154-03:17:00 63 180 Hz spurs 18929i 2003/154-05:14:00 63 180 Hz spurs 18930i 2003/154-07:12:00 63 180 Hz spurs 18931i 2003/154-09:09:00 63 60Hz and 180 Hz spurs The following occultation was captured at two different antennas: Occultation Start Date/Time DSS #1 DSS #2 ----------- ----------------- ------ ------ 18931i 2003/154-09:09:00 63 25 Closed Loop Data ================ Data Collection --------------- We have obtained the following files from OSCAR: Original File Name Name on SOPC ------------------------------------ ------------ ODF: 03154O154.DAT;1 3154154A.ODF ODF: 03155O155.DAT;1 3155155A.ODF Ancillary Data ============== Data Collection --------------- We have obtained the following files from the DOM: Original File Name Name on SOPC ------------------------------------ ------------ AMD: amdgen.03-154.out 3152152A.AMD AMD: amdgen.03-155.out 3153154A.AMD DKF: mm285a.05.dkf 3155158C.DKF OPT: optg_m_030526_OD18831-18914_rec_V1 3146153A.OPT SAK: mgs_solar_array_2003-152.ck 3152152A.SAK SAK: mgs_solar_array_2003-153.ck 3153153A.SAK SOE: mm285a.05.tsoe 3155159C.SOE SOE: mm285a.06.tsoe 3155159D.SOE SPK: spk_m_030526_OD18831-18914_rec_V1 3146153A.SPK TCK: mgs_spice_c_kernel_2003-152.ck 3152152A.TCK TCK: mgs_spice_c_kernel_2003-153.ck 3153153A.TCK We have obtained the following files from NAIF: Original File Name Name on SOPC ------------------------------------ ------------ AGK: mgs_hga_ck_2003-05-25.bc 3145145A.AGK