PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM STANDARD_DATA_PRODUCT_ID = HEA DATA_SET_ID = "MEX-M-MRS-1/2/3-EXT2-2488-V1.0" PRODUCT_ID = "M00SUE0L1A_HEA_101841625_00.TXT" PRODUCT_CREATION_TIME = 2012-10-10T15:24:20.000 PRODUCER_ID = "SUE" INSTRUMENT_HOST_ID = "MEX" OBJECT = TEXT PUBLICATION_DATE = 2010-07-08 NOTE = "DSN MEX Bistatic Radar Data Report" END_OBJECT = TEXT END Miscellaneous ============= This is the first report since HEAA187A.TXT. Open Loop Data ============== Data Collection --------------- We have completed quick-look processing on the following MEX RSR open loop bistatic radar data at Stanford: DOY DSS RSR BAND RSR CH KSPS BT REC RECS RSR MAX START STOP ID RS LEN FILE NAME SNR --- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ ----- 184 63 16:25:05 17:47:00 -/XR 4 3 25 16 25260 19664 A184162A.RSR 3.9 184 63 16:25:05 17:47:00 -/SR 3 3 25 16 25260 19664 A184162B.RSR 3.9 184 63 16:25:04 17:47:00 -/XL 2 3 25 16 25260 19668 A184162C.RSR 4.4 184 63 16:25:00 17:47:00 -/SL 1 3 25 16 25260 19684 A184162D.RSR 4.4 184 63 18:01:00 18:39:00 -/XR 4 3 25 16 25260 9124 A184180A.RSR 65.2 184 63 18:01:00 18:39:00 -/SR 3 3 25 16 25260 9124 A184180B.RSR 44.0 184 63 18:01:00 18:39:00 -/XL 2 3 25 16 25260 9124 A184180C.RSR 38.0 184 63 18:01:00 18:39:00 -/SL 1 3 25 16 25260 9124 A184180D.RSR 23.6 184 63 18:39:00 19:51:00 -/XR 4 3 25 16 25260 17284 A184183A.RSR 60.6 184 63 18:39:00 19:51:00 -/SR 3 3 25 16 25260 17284 A184183B.RSR 40.6 184 63 18:39:00 19:51:00 -/XL 2 3 25 16 25260 17284 A184183C.RSR 32.1 184 63 18:39:00 19:51:00 -/SL 1 3 25 16 25260 17284 A184183D.RSR 20.2 184 63 19:51:00 20:57:00 -/XR 4 3 25 16 25260 15844 A184195A.RSR 59.2 184 63 19:51:00 20:57:00 -/SR 3 3 25 16 25260 15844 A184195B.RSR 4.4 184 63 19:51:00 20:57:00 -/XL 2 3 25 16 25260 15844 A184195C.RSR 28.5 184 63 19:51:00 20:57:00 -/SL 1 3 25 16 25260 15844 A184195D.RSR 5.5 184 63 18:39:00 18:57:00 -/XR 4 4 100 16 20260 21620 A184183E.RSR 27.9 184 63 18:39:00 18:57:00 -/SR 3 4 100 16 20260 21620 A184183F.RSR 11.7 184 63 18:39:00 18:57:00 -/XL 2 4 100 16 20260 21620 A184183G.RSR 35.5 184 63 18:39:00 18:57:00 -/SL 1 4 100 16 20260 21620 A184183H.RSR 15.0 184 63 18:57:00 19:15:00 -/XR 4 4 100 16 20260 21620 A184185A.RSR 29.7 184 63 18:57:00 19:15:00 -/SR 3 4 100 16 20260 21620 A184185B.RSR 14.1 184 63 18:57:00 19:15:00 -/XL 2 4 100 16 20260 21620 A184185C.RSR 33.8 184 63 18:57:00 19:15:00 -/SL 1 4 100 16 20260 21620 A184185D.RSR 13.6 184 63 19:15:00 19:33:00 -/XR 4 4 100 16 20260 21620 A184191A.RSR 29.0 184 63 19:15:00 19:33:00 -/SR 3 4 100 16 20260 21620 A184191B.RSR 14.6 184 63 19:15:00 19:33:00 -/XL 2 4 100 16 20260 21620 A184191C.RSR 31.0 184 63 19:15:00 19:33:00 -/SL 1 4 100 16 20260 21620 A184191D.RSR 12.5 184 63 19:33:00 19:50:58 -/XR 4 4 100 16 20260 21580 A184193A.RSR 63.5 184 63 19:33:00 19:50:58 -/SR 3 4 100 16 20260 21580 A184193B.RSR 41.9 184 63 19:33:00 19:50:58 -/XL 2 4 100 16 20260 21580 A184193C.RSR 33.9 184 63 19:33:00 19:50:58 -/SL 1 4 100 16 20260 21580 A184193D.RSR 20.2 Anomalies --------- There was a 2.5 dB drop in output from the S-LCP RSR at 18:39, just as the surface observations were beginning. The anomaly lasted about 5 minutes. Similar anomalies have been seen in S-LCP data collected at DSS 63 on days 106, 135, 142, and 170, usually at elevation angles near 45 degrees. Susan Kurtik has organized a task force to investigate the problem; it has been discussed during conference calls on days 180 and 187. There were also two short drops during the post-cal (with the antenna at stow); the first at about 20:13 was about 1.5 dB and the second at about 20:54 was about 0.7 dB. Each lasted only a few seconds. S-RCP, which has been generally unstable at the 0.2 dB level over the past three months, performed much better during this experiment. The task force (above) was advised that, because of a power failure, the S-RCP maser had gone through a full cool-down procedure; contaminants may have been cleared out, leading to better performance. There was no evidence that the X-RCP noise diode was turned on at any time during the ground pre-calibration. The reason for this is unknown. At the beginning of tracking, the noise diode operated normally during the 'mini-calibration'. The noise diode also operated normally during the post-surface mini-cal and the post-calibration. The one-way ingress occultation was captured at X-Band (and possibly S-Band). The one-way egress occultation was captured at X-Band. Very weak S-RCP surface echoes can be seen just before ingress; very weak S-LCP echoes can be seen at the beginning of the surface observations. With Earth-Mars distance approaching 2 A.U., S-Band echoes will be increasingly difficult to capture.