PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM STANDARD_DATA_PRODUCT_ID = HEA DATA_SET_ID = "MEX-M-MRS-1/2/3-PRM-0725-V1.0" PRODUCT_ID = "M00SUE0L1A_HEA_053622330_00.TXT" PRODUCT_CREATION_TIME = 2008-06-03T12:03:50.000 PRODUCER_ID = "SUE" INSTRUMENT_HOST_ID = "MEX" OBJECT = TEXT PUBLICATION_DATE = 2005-12-29 NOTE = "DSN MEX Data Collection" END_OBJECT = TEXT END Miscellaneous ============= This is the first report since HEA5362A.TXT. Sami Asmar forwarded the following from John Klose regarding absence of S-Band signals during recent occultations: I just got off the phone with Dave Allen. It appears that the lost S-Band signal from DSS15 has been restored. They are tracking an X-Band pass now so he can not verify the signal. The cause of the problem appears to be a loose cable at the recently installed sparred RSR switch. Occultations affected included those during the following passes at DSS 15: DOY SOA BOT EOT EOA PASS --- ---- ---- ---- ---- ---- 343 0000 0100 0655 0710 0922 SOA = start of activity 347 2330 0045 0350 0350 0927 BOT = beginning of track 351 0310 0340 0545 0545 0930 EOT = end of track 356 0210 0240 0725 0725 0935 EOA = end of activity 358 0205 0235 0540 0540 0937 358 2150 2305 0745 0800 0938 359 2155 2310 0445 0445 0939 The "loose cable" explanation supersedes the theory offered in HEA5362A.TXT that the spacecraft S-Band transmitter is not being turned on. The next scheduled occultation observation at DSS 15 is on 2006/004. Open Loop Data ============== Data Collection --------------- We have completed quick-look processing on the following MEX RSR open loop radio occultation data at Stanford: DOY DSS RSR BAND RSR CH KSPS BT REC RECS RSR MAX START STOP ID RS LEN FILE NAME SNR --- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ ----- 362 65 23:30:00 23:49:00 X/XR 4 1 2 16 8260 1141 5362233A.RSR 60.0 362 65 23:30:00 23:49:00 X/SR 3 1 2 16 8260 1141 5362233B.RSR 44.7 Except for the ubiquitous power line spurs when strong X-Band signals are present, these appear to be excellent 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 --- --- -------- -------- ---- --- -- ---- -- ----- ----- ------------ ----- 345 63 21:35:01 22:45:00 -/XR 4 3 25 16 25260 16797 5345213A.RSR 3.6 346 63 01:00:00 02:08:00 -/XR 4 3 25 16 25260 16321 5346010A.RSR 72.2 346 63 02:08:00 02:38:00 -/XR 4 3 25 16 25260 7201 5346020A.RSR 25.1 346 63 02:38:00 03:50:00 -/XR 4 3 25 16 25260 17281 5346023A.RSR 21.9 345 63 21:35:01 22:45:00 -/SR 3 3 25 16 25260 16797 5345213B.RSR 4.3 346 63 01:00:00 02:08:00 -/SR 3 3 25 16 25260 16321 5346010B.RSR 53.2 346 63 02:08:00 02:38:00 -/SR 3 3 25 16 25260 7201 5346020B.RSR 14.4 346 63 02:38:00 03:50:00 -/SR 3 3 25 16 25260 17281 5346023B.RSR 10.8 345 63 21:35:01 22:45:00 -/XL 2 3 25 16 25260 16797 5345213C.RSR 4.4 346 63 01:00:00 02:08:00 -/XL 2 3 25 16 25260 16321 5346010C.RSR 47.9 346 63 02:08:00 02:38:00 -/XL 2 3 25 16 25260 7201 5346020C.RSR 22.7 346 63 02:38:00 03:50:00 -/XL 2 3 25 16 25260 17281 5346023C.RSR 4.1 345 63 21:35:01 22:45:00 -/SL 1 3 25 16 25260 16797 5345213D.RSR 3.5 346 63 01:00:00 02:08:00 -/SL 1 3 25 16 25260 16321 5346010D.RSR 28.5 346 63 02:08:00 02:38:00 -/SL 1 3 25 16 25260 7201 5346020D.RSR 19.4 346 63 02:38:00 03:50:00 -/SL 1 3 25 16 25260 17281 5346023D.RSR 19.5 Anomalies --------- There is a good surface echo in each channel, and there is no obvious interference. The X-Band carrier is outside the recorded 25 kHz passband; the S-Band carrier is easily visible in both polarizations. The S-RCP noise diode appears not to have been turned on during the post-cal ambient load period. There is a 1.5 dB (peak-to-peak) amplitude modulation of the X-Band carrier level during the pre-experiment BCAL period. The same modulation also appears to be present at S-Band, but at a much lower level. 100 kHz data have been transferred to Stanford, but the S-LCP file is short by about 7 minutes. We are attempting to recover those data before beginning the quick-look processing.