PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM STANDARD_DATA_PRODUCT_ID = HEA DATA_SET_ID = "MEX-M-MRS-1/2/3-EXT1-0917-V1.0" PRODUCT_ID = "M00SUE0L1A_HEA_060971808_01.TXT" PRODUCT_CREATION_TIME = 2009-05-08T12:07:01.000 PRODUCER_ID = "SUE" INSTRUMENT_HOST_ID = "MEX" OBJECT = TEXT PUBLICATION_DATE = 2006-04-19 NOTE = "DSN MEX Data Collection" END_OBJECT = TEXT END Miscellaneous ============= This is the first report since HEA6107A.TXT. Open Loop Data ============== Data Collection --------------- We have completed quick-look processing on the following MEX 25 kHz 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 --- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ ----- 097 63 16:08:00 17:20:00 -/XR 4 3 25 16 25260 17281 6097160A.RSR 4.1 097 63 16:08:00 17:20:00 -/SR 3 3 25 16 25260 17281 6097160B.RSR 4.0 097 63 16:08:00 17:20:00 -/XL 2 3 25 16 25260 17281 6097160C.RSR 6.0 097 63 16:08:00 17:20:00 -/SL 1 3 25 16 25260 17281 6097160D.RSR 3.6 097 63 17:20:00 18:36:00 -/XR 4 3 25 16 25260 18241 6097172A.RSR 65.1 097 63 17:20:00 18:36:00 -/SR 3 3 25 16 25260 18241 6097172B.RSR 44.9 097 63 17:20:00 18:36:00 -/XL 2 3 25 16 25260 18241 6097172C.RSR 33.7 097 63 17:20:00 18:36:00 -/SL 1 3 25 16 25260 18241 6097172D.RSR 22.4 097 63 18:36:00 19:36:00 -/XR 4 3 25 16 25260 14401 6097183A.RSR 8.3 097 63 18:36:00 19:36:00 -/SR 3 3 25 16 25260 14401 6097183B.RSR 4.8 097 63 18:36:00 19:36:00 -/XL 2 3 25 16 25260 14401 6097183C.RSR 7.8 097 63 18:36:00 19:36:00 -/SL 1 3 25 16 25260 14401 6097183D.RSR 8.8 097 63 19:36:00 20:40:00 -/XR 4 3 25 16 25260 15361 6097193A.RSR 7.7 097 63 19:36:00 20:40:00 -/SR 3 3 25 16 25260 15361 6097193B.RSR 4.3 097 63 19:36:00 20:40:00 -/XL 2 3 25 16 25260 15361 6097193C.RSR 3.9 097 63 19:36:00 20:40:00 -/SL 1 3 25 16 25260 15361 6097193D.RSR 3.9 098 14 18:51:00 20:00:00 -/XR 4 3 25 16 25260 16561 6098185A.RSR 5.2 098 14 18:51:00 20:00:00 -/SR 3 3 25 16 25260 16561 6098185B.RSR 4.0 098 14 18:51:00 20:00:00 -/XL 6 3 25 16 25260 16561 6098185C.RSR 5.9 098 14 18:51:00 20:00:00 -/SL 5 3 25 16 25260 16561 6098185D.RSR 3.6 098 14 20:00:00 21:26:00 -/XR 4 3 25 16 25260 20641 6098200A.RSR 65.9 098 14 20:00:00 21:26:00 -/SR 3 3 25 16 25260 20641 6098200B.RSR 45.7 098 14 20:00:00 21:26:00 -/XL 6 3 25 16 25260 20641 6098200C.RSR 41.7 098 14 20:00:00 21:26:00 -/SL 5 3 25 16 25260 20641 6098200D.RSR 17.6 098 14 21:26:00 22:26:00 -/XR 4 3 25 16 25260 14401 6098212A.RSR 10.9 098 14 21:26:00 22:26:00 -/SR 3 3 25 16 25260 14401 6098212B.RSR 3.8 098 14 21:26:00 22:26:00 -/XL 6 3 25 16 25260 14401 6098212C.RSR 4.7 098 14 21:26:00 22:26:00 -/SL 5 3 25 16 25260 14401 6098212D.RSR 11.0 098 14 22:26:00 23:45:00 -/XR 4 3 25 16 25260 18961 6098222A.RSR 67.6 098 14 22:26:00 23:45:00 -/SR 3 3 25 16 25260 18961 6098222B.RSR 45.1 098 14 22:26:00 23:45:00 -/XL 6 3 25 16 25260 18961 6098222C.RSR 40.0 098 14 22:26:00 23:45:00 -/SL 5 3 25 16 25260 18961 6098222D.RSR 16.4 Anomalies --------- The DSS 63 S-RCP maser showed evidence for short term instabilities until the start of MiniCal #1 (about 2006-097T18:12:00); the maser seemed to be normal for the remainder of the experiment. The primary impact was a slight reduction in confidence about the pre-cal measurements; but in hindsight they are indistinguishable from the post-cal results. The gain of the DSS 63 S-LCP maser seemed to oscillate with a period of about 4 minutes and an amplitude of about +/-0.1 dB. This did not appear to be a problem until the redundant measurements of the noise diode calibrations were compared; the spread was from about 33K to about 40K. A value at the low end of the range was chosen for further analysis because it matched the values measured on 2006/092 reasonably well. Worse was a sudden drop of about 12 percent in the S-LCP gain at the beginning of the BSR period (2006-097T18:30:00). There was a slow recovery to what appears to be nominal behavior (albeit with the 4 minute oscillation) a few minutes before MiniCal #2 (about 2006-097T19:40:00). For subsequent processing, we will empirically adjust the gain so that the noise power is more stable during this 70 minute period. It is possible that the S-LCP system temperature was also changing during this time; we have no way to detect and correct both gain and Tsys changes. No S-LCP surface echo is visible in the data examined so far; but some adjustment will be needed later if an echo is eventually detected. During the 2006/097 pre-cal, the X-LCP noise diode appears to have been turned on at a low level at 16:25, then at full power when the 12.5K setting was confirmed at 16:30. An examination of the NMC log does not show how this happened. Gene Goltz noted the two steps in reaching the proper level in his real-time log and it appears that the pre-cal procedure was delayed 5 minutes while the level question was resolved. The data from day 098 have not been processed to the same level as the data from day 097. But there do not appear to be any problems comparable to those of the unstable masers and the noise diode levels. Overall, both of these appear to be very good experiments. As noted in the previous report (HEA6107A.TXT) there are obvious X-LCP echoes on both days; there are hints of echoes on X-RCP. And the Arecibo data from day 098 show echoes in both S-RCP and S-LCP.