PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 1999-09-07 NOTE = " E-mail and other messages concerning MGS Radio Science on or about 1997/072." END_OBJECT = TEXT END From trish@qmail.jpl.nasa.gov Wed Mar 12 14:05:29 1997 Message-Id: Date: 12 Mar 1997 14:01:18 -0800 From: "Trish Priest" Subject: USO Test #9 To: "Dick Simpson" , "Joe Twicken" Cc: "Sami Asmar" X-Mailer: Mail*Link SMTP-QM 3.0.2 Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; Name="Message Body" Content-Transfer-Encoding: quoted-printable Status: R Mail*Link=AE SMTP USO Test #9 Hello, Just a reminder: Tomorrow morning, DOY 072, 11:30 to 13:30 UTC (3:30 AM to 5:30 AM PST) will be the next USO Test. The track ends right after the USO test, so I will not be able to do a retransmission until Friday morning. This is at DSS 45. I will also try to gather some 2-way data from DSS 45 on Friday morning. Summary messages will be sent out after the tests. -Trish ---------------------------------------------------------------------- From trish@qmail.jpl.nasa.gov Thu Mar 13 08:08:43 1997 Message-Id: Date: 13 Mar 1997 08:03:23 -0800 From: "Trish Priest" Subject: USO Test #9 Summary To: "Richard Simpson" , "Joe Twicken" , "Len Tyler" Cc: "Sami Asmar" X-Mailer: Mail*Link SMTP-QM 3.0.2 Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; Name="Message Body" Content-Transfer-Encoding: quoted-printable Status: RO Mail*Link=AE SMTP USO Test #9 Summary Hello, USO Test #9 went smoothly this morning at DSS 45. The times to query data should be 11:32:16 to 13:32:16 UTC. The most up-to-date SOE is c0505.03.soe. The configuration was standard: 5000 sps, filter 3 (2.5k), 12-bit, mode 2, -3750 Hz offset. CONSCAN and ranging were off. Telemetry was on. The usual spurs were present: +/- 650 Hz and the two low frequency spurs. KaBLE was off for the entire test. -Trish ------------------------------------------------------------------------ From joe Mon Mar 17 15:58:02 1997 Received: from neptune.stanford.edu. (neptune.Stanford.EDU [36.10.0.149]) by nova.stanford.edu (8.8.5/8.8.4) with SMTP id PAA07358; Mon, 17 Mar 1997 15:57:30 -0800 (PST) Date: Mon, 17 Mar 1997 15:57:30 -0800 (PST) From: Joe Twicken Message-Id: <199703172357.PAA07358@nova.stanford.edu> To: David.D.Morabito@cc2mhb.jpl.nasa.gov, hinson@nova.stanford.edu, joe@nova.stanford.edu, john@oberon.jpl.nasa.gov, len@nova.stanford.edu, rsimpson@nova.stanford.edu, trish@qmail.jpl.nasa.gov Subject: USO Test #9 (97/072) Status: RO I have processed the ODS data from 97/072. This ODS was recorded at DSS 45. The data were acquired as part of USO Test #9. The SNR was approximately 55 dB/Hz during the Test. This was the fifth USO test since the MGS HGA was deployed. All files for processing this ODS were recorded in the MgsDB database. The ODS was acquired at DSS 45 from 11:32:16 to 13:32:16 at 5000 samples per second in mode 2 (1250 12-bit samples/second for each of 4 A/D's). KaBLE was off during this test. There were 21 missing records in the first ODS query. The query was submitted again following a retransmission and there were 0 missing records. There were no attenuation changes or other problems with operations during the Test. I used the spk_c_970106-970419 SP-kernel file to steer the data. This file was created on 97/050. The POCA file was fixed with our "salvagePoca" program. Once again, no hand modification of the POCA file was required. A very brief analysis of the original POCA file indicated that there were over 165 POCA records in error. The errors were not confined to error bursts. During the 2 hour recording there were a total of 7200 POCA records. A small amplitude modulation with a period of about 10-20 *seconds* is evident in all the carrier amplitude estimates. The peak-to-peak variation during this test was on the order of 0.1 dB. This modulation has the shortest period that I have observed during the MGS USO Tests. As in many previous tests, there were a pair of frequency spurs at approximately 650 Hz on either side of the carrier. The spurs appear to drift through the spectrum along with the carrier. There were also spurs which were fixed in the spectra at 60 and 180 Hz. I estimated the USO frequency to be 8423152930.71 Hz. The best linear fit to the USO frequency since 96/332 has a slope of 0.255 Hz/day. This fit is actually quite good. The 1-sigma error between our USO frequency estimates since 96/332 and the best linear fit to them is 0.23 Hz. The Allan deviation for this recording is shown below. The SNR during the acquisition of data was approximately 55 dB/Hz. I did not compensate for the spacecraft spin cycle. t (sec) AD ------ ---------- 0.4096 3.7032e-13 1.6384 2.1732e-13 3.2768 1.6679e-13 6.5536 1.2014e-13 26.2144 1.0081e-13 Plots, as usual, are in the notebook in room 222. Joe ---------------------------------------------------------------------- From trish@qmail.jpl.nasa.gov Tue Mar 18 16:18:02 1997 Message-Id: Date: 18 Mar 1997 16:17:18 -0800 From: "Trish Priest" Subject: ATDF for USO and GWE To: "Joe Twicken" Cc: "Dick Simpson" X-Mailer: Mail*Link SMTP-QM 3.0.2 Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; Name="Message Body" Content-Transfer-Encoding: quoted-printable Status: RO Mail*Link=AE SMTP ATDF for USO and GWE Hello, Joe, The ATDFs for the USO test #9 and the GWE Rehearsal on DOY 073 should be on Oscar. -Trish