PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2007-07-31 NOTE = " E-mail and other messages concerning MGS Radio Science on or about 2003/197." END_OBJECT = TEXT END From aseel@airmail.fltops.jpl.nasa.gov Wed Jul 16 05:10:07 2003 Received: from airmail1.fltops.jpl.nasa.gov (airmail2.fltops.jpl.nasa.gov [137.228.96.27]) by magellan.stanford.edu (8.11.6/8.11.6) with ESMTP id h6GCA6W13964; Wed, 16 Jul 2003 05:10:06 -0700 (PDT) Received: from rsops2.fltops.jpl.nasa.gov (rsops2.fltops.jpl.nasa.gov [137.228.136.22]) by airmail1.fltops.jpl.nasa.gov (Postfix) with ESMTP id CABCA10924; Wed, 16 Jul 2003 05:10:01 -0700 (PDT) Received: (from aseel@localhost) by rsops2.fltops.jpl.nasa.gov (8.11.6+Sun/8.11.6) id h6GCA1C10408; Wed, 16 Jul 2003 12:10:01 GMT Date: Wed, 16 Jul 2003 12:10:01 GMT From: aseel anabtawi Message-Id: <200307161210.h6GCA1C10408@rsops2.fltops.jpl.nasa.gov> Content-Type: text To: undisclosed-recipients:; Content-Length: 456 Status: RO DSS: 26 RSR: RSR2A Subchannel: 1 Orbit Number: 19457 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-08:56:00 End Record: 2003/197-09:06:00 DSS: 26 RSR: RSR2A Subchannel: 1 Orbit Number: 19458 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-10:54:00 End Record: 2003/197-11:03:00 -------------------------------------------------------------------------- From aseel@godzilla.jpl.nasa.gov Wed Jul 16 16:10:22 2003 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.78.95]) by magellan.stanford.edu (8.11.6/8.11.6) with ESMTP id h6GNALW21445 for ; Wed, 16 Jul 2003 16:10:22 -0700 (PDT) Received: from aseel (aseel.jpl.nasa.gov [137.78.78.43]) by godzilla.jpl.nasa.gov (8.9.3p2.cm/8.9.3) with SMTP id QAA17518; Wed, 16 Jul 2003 16:10:22 -0700 (PDT) Message-ID: <006501c34bef$59c9f320$2b4e4e89@jpl.nasa.gov> Reply-To: "Aseel Anabtawi" From: "Aseel Anabtawi" To: "Dick Simpson 723-3525" , References: <200307152049.h6FKn2H05542@magellan.stanford.edu> Subject: Re: Fgain Date: Wed, 16 Jul 2003 16:09:47 -0700 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Content-Length: 1272 Status: R Hello Dick, I did reduce the fgain at 43 by 2 dB for tomorrow's pass, but the SNR was very close to 70! I did not find any clipping messages, but it's close! I suggest we go back to 72 for tomorrow's pass. What do you think? Regards, Aseel ----- Original Message ----- From: "Dick Simpson 723-3525" To: ; Sent: Tuesday, July 15, 2003 1:49 PM Subject: Fgain > > Aseel: > > Based on the results from 2003/192, I would recommend decreasing > Fgian by 2 dB at station 43 when using RSR2A. > > The current setting is conservative when considering only the > carrier; but the signal is so strong that we are starting to > lose some resolution when it comes to the noise. > > Measured carrier-to-noise ratio was about 66 dB. It appears from > the histograms that you have about 6 dB to spare before clipping. > This is consistent with the Fgain=72 that I see in the data > records. > > But I don't think we need quite so much margin; it might be good > to try Fgain=70 dB for the next DSS 43/RSR2A pass. > > I also looked at some DSS 65 and DSS 26 plots; those bounce > around more. We could probably tune them a bit better, but > they are OK as is. > > Thanks, > Dick > -------------------------------------------------------------------------- From aseel@airmail.fltops.jpl.nasa.gov Wed Jul 16 16:10:06 2003 Received: from airmail1.fltops.jpl.nasa.gov (airmail2.fltops.jpl.nasa.gov [137.228.96.27]) by magellan.stanford.edu (8.11.6/8.11.6) with ESMTP id h6GNA6W21433; Wed, 16 Jul 2003 16:10:06 -0700 (PDT) Received: from rsops2.fltops.jpl.nasa.gov (rsops2.fltops.jpl.nasa.gov [137.228.136.22]) by airmail1.fltops.jpl.nasa.gov (Postfix) with ESMTP id A59EF1091A; Wed, 16 Jul 2003 16:10:01 -0700 (PDT) Received: (from aseel@localhost) by rsops2.fltops.jpl.nasa.gov (8.11.6+Sun/8.11.6) id h6GNA1J11534; Wed, 16 Jul 2003 23:10:01 GMT Date: Wed, 16 Jul 2003 23:10:01 GMT From: aseel anabtawi Message-Id: <200307162310.h6GNA1J11534@rsops2.fltops.jpl.nasa.gov> Content-Type: text To: undisclosed-recipients:; Content-Length: 1368 Status: RO DSS: 43 RSR: RSR2A Subchannel: 1 Orbit Number: 19459 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-12:51:00 End Record: 2003/197-13:01:00 DSS: 43 RSR: RSR2A Subchannel: 1 Orbit Number: 19460 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-14:49:00 End Record: 2003/197-14:59:00 DSS: 43 RSR: RSR2A Subchannel: 1 Orbit Number: 19461 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-16:47:00 End Record: 2003/197-16:57:00 DSS: 43 RSR: RSR2A Subchannel: 1 Orbit Number: 19462 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-18:44:00 End Record: 2003/197-18:54:00 DSS: 43 RSR: RSR2A Subchannel: 1 Orbit Number: 19463 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-20:42:00 End Record: 2003/197-20:52:00 DSS: 43 RSR: RSR2A Subchannel: 1 Orbit Number: 19464 Occultation Sense: i SOE: mm297a.05.tsoe Ground Mode: 1 Uplink Station: -- Sampling Rate: 2K Bit Resolution: 16 Begin Record: 2003/197-22:40:00 End Record: 2003/197-22:50:00