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 2001/110." END_OBJECT = TEXT END From ppriest@airmail.fltops.jpl.nasa.gov Fri Apr 20 08:57 PDT 2001 Received: from thorn.fltops.jpl.nasa.gov (thorn.fltops.jpl.nasa.gov [137.228.90.10]) by magellan.stanford.edu (8.9.3/8.9.3) with SMTP id IAA10569; Fri, 20 Apr 2001 08:57:11 -0700 (PDT) Received: by thorn.fltops.jpl.nasa.gov; id IAA04862; Fri, 20 Apr 2001 08:57:12 -0700 Received: from airmail.fltops.jpl.nasa.gov(137.228.96.12) by thorn.fltops.jpl.nasa.gov via smap (V4.2) id xma004804; Fri, 20 Apr 01 08:56:39 -0700 Received: from mmrs.fltops.jpl.nasa.gov (mmrs.fltops.jpl.nasa.gov [137.228.136.10]) by airmail.fltops.jpl.nasa.gov (8.9.3+Sun/8.9.3) with ESMTP id IAA29844; Fri, 20 Apr 2001 08:56:38 -0700 (PDT) Received: (from ppriest@localhost) by mmrs.fltops.jpl.nasa.gov (8.8.8+Sun/8.8.8) id PAA20918; Fri, 20 Apr 2001 15:56:38 GMT Date: Fri, 20 Apr 2001 15:56:38 GMT From: Patricia Priest Message-Id: <200104201556.PAA20918@mmrs.fltops.jpl.nasa.gov> DSS: 15 Apparently-To: Apparently-To: Content-Type: text Content-Length: 437 Status: RO Orbit: 9463i SOE: mm132a.04.tsoe Begin Record: 110/08:08:00 End Record: 110/08:15:00 Last Attenuation Change: 04/20/01 SNT: Elevation Angle: Orbit: 9464i SOE: mm132a.04.tsoe Begin Record: 110/10:06:00 End Record: 110/10:12:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 9465i SOE: mm132a.04.tsoe Begin Record: 110/12:03:00 End Record: 110/12:10:00 Last Attenuation Change: SNT: Elevation Angle: -------------------------------------------------------------------------- From Elias.Barbinis@jpl.nasa.gov Fri Apr 20 13:35 PDT 2001 Received: from godzilla.jpl.nasa.gov (godzilla.jpl.nasa.gov [137.78.177.120]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id NAA18026 for ; Fri, 20 Apr 2001 13:35:04 -0700 (PDT) Received: from jpl.nasa.gov (eliasb.jpl.nasa.gov [137.78.177.117]) by godzilla.jpl.nasa.gov (8.9.3/8.9.3) with ESMTP id NAA08907; Fri, 20 Apr 2001 13:35:02 -0700 (PDT) Message-ID: <3AE09D76.78E6AC60@jpl.nasa.gov> Date: Fri, 20 Apr 2001 13:35:02 -0700 From: Elias Barbinis X-Mailer: Mozilla 4.7 [en] (WinNT; I) X-Accept-Language: en MIME-Version: 1.0 To: Dick Simpson 723-3525 CC: Aseel Anabtawi , Elias Barbinis Subject: 9468i over DSS34 today Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=us-ascii Content-Length: 396 Status: RO Hello Dick, There was a problem with the I/F switch at DSS34 at ~ 17:52 UTC today and as a result we lost the data from 9468i (17:57 UTC to 18:03 UTC). The station took the DSP down to fix the problem and they brought it up before our next measurement for 9469i which was OK. DSS34 gave me the DR # C100074 for this problem. Regards, Elias -------------------------------------------------------------------------- From ppriest@airmail.fltops.jpl.nasa.gov Fri Apr 20 16:17 PDT 2001 Received: from thorn.fltops.jpl.nasa.gov (thorn.fltops.jpl.nasa.gov [137.228.90.10]) by magellan.stanford.edu (8.9.3/8.9.3) with SMTP id QAA19673; Fri, 20 Apr 2001 16:17:46 -0700 (PDT) Received: by thorn.fltops.jpl.nasa.gov; id QAA29569; Fri, 20 Apr 2001 16:17:45 -0700 Received: from airmail.fltops.jpl.nasa.gov(137.228.96.12) by thorn.fltops.jpl.nasa.gov via smap (V4.2) id xma029191; Fri, 20 Apr 01 16:17:11 -0700 Received: from mmrs.fltops.jpl.nasa.gov (mmrs.fltops.jpl.nasa.gov [137.228.136.10]) by airmail.fltops.jpl.nasa.gov (8.9.3+Sun/8.9.3) with ESMTP id QAA12128; Fri, 20 Apr 2001 16:17:10 -0700 (PDT) Received: (from ppriest@localhost) by mmrs.fltops.jpl.nasa.gov (8.8.8+Sun/8.8.8) id XAA21160; Fri, 20 Apr 2001 23:17:10 GMT Date: Fri, 20 Apr 2001 23:17:10 GMT From: Patricia Priest Message-Id: <200104202317.XAA21160@mmrs.fltops.jpl.nasa.gov> DSS: 34 Apparently-To: Apparently-To: Content-Type: text Content-Length: 853 Status: RO Orbit: 9465i SOE: mm132a.04.tsoe Begin Record: 110/12:03:00 End Record: 110/12:10:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 9466i SOE: mm132a.04.tsoe Begin Record: 110/14:01:00 End Record: 110/14:08:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 9467i SOE: mm132a.04.tsoe Begin Record: 110/15:59:00 End Record: 110/16:06:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 9468i SOE: mm132a.04.tsoe Begin Record: 110/17:57:00 End Record: 110/18:03:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 9469i SOE: mm132a.04.tsoe Begin Record: 110/19:54:00 End Record: 110/20:01:00 Last Attenuation Change: SNT: Elevation Angle: Orbit: 9470i SOE: mm132a.04.tsoe Begin Record: 110/21:52:00 End Record: 110/21:59:00 Last Attenuation Change: SNT: Elevation Angle: -------------------------------------------------------------------------- From joe@neptune.stanford.edu Thu Apr 26 13:14 PDT 2001 Received: from neptune.Stanford.EDU (neptune [171.64.90.149]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id NAA14329 for ; Thu, 26 Apr 2001 13:14:19 -0700 (PDT) Received: (from joe@localhost) by neptune.Stanford.EDU (8.9.3/8.9.3) id NAA03644; Thu, 26 Apr 2001 13:14:16 -0700 (PDT) Message-ID: X-Mailer: XFMail 1.2 [p0] on Solaris X-Priority: 3 (Normal) Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: <200104261726.KAA10016@magellan.stanford.edu> Date: Thu, 26 Apr 2001 13:14:16 -0700 (PDT) Sender: joe@neptune.stanford.edu From: Joe Twicken To: joe@nova.stanford.edu, rsimpson@magellan.stanford.edu, hinson@nova.stanford.edu Subject: RE: ODR Notice: /users/z13/procODR/11161709 Content-Type: text/plain; charset=us-ascii Content-Length: 1179 Status: RO (1) The Allan deviation for the 11100808.ODR recording was high (8.5e-13 at 3.2 seconds) (2) There were sizeable frequency spurs at +/-60 Hz and +/-120 Hz from the carrier in the two recordings at DSS 15 (3) There was no HGA motion compensation for these recordings On 26-Apr-01 Joe Twicken 723-3597 wrote: > 11100808.ODR p 15XRXIR1R201 15XRXIC1XX01 15XR1IF1S101 15XR1IS1T101 > 15XR1IS1T201 15XR1IS1T301 15XR1IS1T401 15XR1IS1T501 > 11101006.ODR p 15XRXIR1R201 15XRXIC1XX01 15XR1IF1S101 15XR1IS1T101 > 15XR1IS1T201 15XR1IS1T301 15XR1IS1T401 15XR1IS1T501 > 1110120D.ODR p 34XRXIR1R201 34XRXIC1XX01 34XR1IF1S101 34XR1IS1T101 > 34XR1IS1T201 34XR1IS1T301 34XR1IS1T401 34XR1IS1T501 > 11101401.ODR p 34XRXIR1R201 34XRXIC1XX01 34XR1IF1S101 34XR1IS1T101 > 34XR1IS1T201 34XR1IS1T301 34XR1IS1T401 34XR1IS1T501 > 11101559.ODR p 34XRXIR1R201 34XRXIC1XX01 34XR1IF1S101 34XR1IS1T101 > 34XR1IS1T201 34XR1IS1T301 34XR1IS1T401 34XR1IS1T501 > 11101954.ODR p 34XRXIR1R201 34XRXIC1XX01 34XR1IF1S101 34XR1IS1T101 > 34XR1IS1T201 34XR1IS1T301 34XR1IS1T401 34XR1IS1T501 > 11102152.ODR p 34XRXIR1R201 34XRXIC1XX01 34XR1IF1S101 34XR1IS1T101 > 34XR1IS1T201 34XR1IS1T301 34XR1IS1T401 34XR1IS1T501 -------------------------------------------------------------------------- From sami.asmar@jpl.nasa.gov Fri May 4 13:48 PDT 2001 Received: from eis-msg-012.jpl.nasa.gov (eis-msg-012.jpl.nasa.gov [137.78.160.40]) by magellan.stanford.edu (8.9.3/8.9.3) with ESMTP id NAA03751 for ; Fri, 4 May 2001 13:48:35 -0700 (PDT) Received: from asmar-nt (asmar-nt.jpl.nasa.gov [137.78.177.111]) by eis-msg-012.jpl.nasa.gov (8.9.3/8.9.3) with SMTP id NAA04418; Fri, 4 May 2001 13:48:32 -0700 (PDT) Message-Id: <3.0.5.32.20010504134831.02862290@pop.jpl.nasa.gov> X-Sender: asmar@pop.jpl.nasa.gov X-Mailer: QUALCOMM Windows Eudora Pro Version 3.0.5 (32) Date: Fri, 04 May 2001 13:48:31 -0700 To: Frank Lemoine , rsimpson@magellan.stanford.edu, bruce.banerdt@jpl.nasa.gov From: Sami Asmar Subject: Contingency Mode and Solar Array Quaternion Cc: flemoine@geodesy2.gsfc.nasa.gov, dsmith@tharsis.gsfc.nasa.gov, zuber@tharsis.gsfc.nasa.gov, len@nova.stanford.edu, boris.semenov@jpl.nasa.gov, neumann@tharsis.gsfc.nasa.gov, drowland@helmert.gsfc.nasa.gov.hinson@nimbus.stanford.edu, aseel@godzilla.jpl.nasa.gov In-Reply-To: <200105041255.MAA10265@geodesy2.gsfc.nasa.gov> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Length: 5222 Status: RO Hi Frank, I gave you some background to the changes the project was implementing to the solar arrays at the Radio Science Team meeting. Now, it turns out, they decided to change the angle of the arrays to get less sun (by 25 degrees). That took about a week to accomplish. As I write this, MGS is in a contingency mode, in case you have not heard. We will be losing occultation data due to the low SNR from the LGA, so expect a degradation in gravity data as well. The Project chose to be stay in this mode for the weekend after initial attempts with the sequence was not successful. The solar array issues will be revisited next week and they may be changed again... that may have been the cause of the contingency mode - we don't know. Sorry that this is not too convenient for data analysis but we can't really complain either as the Project has to do what they need to do. We were commenting yesterday at the PSG that the environment is different in the extended mission. The priorities are to keep the spacecraft working through 2004. At best, the Project will let us know in advance about their plans for the solar array, but we have to keep our eyes open and expect to do more labor-intensive modelling. Thanks Sami At 12:55 PM 5/4/2001 GMT, Frank Lemoine wrote: > Gentlemen: > I forward to you a problem below describing an important > issue with the solar array quaternions. We routinely must > fill in for gaps and have developed a procedure for this. > Starting on April 17, though, we noticed significant > and numerous changes in how the solar array was being > oriented from orbit to orbit. For a few days at least, > it is hard to see a consistent pattern. We must fill > in the gaps, since we must model the motion of the solar arrays > accurately (they have a combined surface area of 16 m**2, so we > won't get the nonconservative force modelling correct if we > don't model the solar array motion properly). > Can you advise if the pattern that began on April 20 will > continue for some time? Or will there be more joy-sticking > of the solar arrays? > I point out that mismodelling the nonconservative forces will > degrade our MOLA POD quality and ultimately could alias > into or contaminate into any estimates of K2, which we very much > want to try to get. > > Another way to solve this problem is to fill the gaps in the > solar array c-kernels - which would also simplify our life > immensely. As you can see from the list below, the gaps > can be quite large - sometimes several orbits in duration. > > Thanks for any suggestions you might have, > > Frank Lemoine > >> >> Dear Frank, >> I have been having extreme difficulty in filling >> in the data gaps in the solar arrary quaternions. Everything >> seemed to be in order for March 14-31. During that time, >> the orbits alternated between what you called regime I and >> regime II. >> However, on April 1, 2001 at 00:00:00, the pattern >> suddenly switched to what I call "1 2 2" - a cycle of >> three orbits with patterns different than your I & II. >> This continued until April 16 at about 17:00:00 when >> there was an interruption. >> Beginning on April 17 at 00:00:00, the pattern changed >> again to what I call "A B C", a cycle of 3 orbits with 3 >> different patterns. In the previous cases, only Euler >> angle 2 changed. However, in the "A B C" patterns, all >> 3 euler angles change with mean anomaly. >> Then on April 20 at about 16:53:00, the pattern >> changed again to what I call "D D E". This pattern >> continues until at least Apr 29 00:00:00, which is >> the last time point that I have data for at the moment. >> Can you tell me how long this "D D E" pattern >> will continue? If the patterns keep changing, it will >> be very labor intensive to fill in the gaps in the >> quaternion data as a new interpolation subroutine has >> to be determined for each pattern (I have not written >> any subroutines for A B C D or E yet.). >> Typically, Euler angle #2 remains constant for a time, >> then ramps to a new value where it remains constant for another >> period of time. Each of these times of constant value are called >> a "step". In March, for each orbit, there was a 4 step repeating >> pattern (Euler angle #2 changed 4 different times per orbit). >> Beginning on April 1, it has been a 3 step repeating pattern >> per orbit. (This was confirmed by Sami at the Radio Science >> Meeting on April 17.) Thus, in order to make an interpolation >> subroutine, the flat step times and values and the ramp transition >> times between the steps must be determined for each of the lettered >> (A B C D E) patterns. For April, Euler angle #2's three step >> values are -69 deg, -5 deg, and +64 deg. Euler angle #1 has values >> of 150 deg, 90 deg, and 330 deg. Euler angle #3 is mostly 0 but >> also have values of 90 and 180 deg. >> Attached is list of the gaps in the quaterion data from >> March 14 - April 28. The longest gap is about 300 min on April 16. >> The smallest time gap noted by the gap checking program is 5 min. >> >> Doug >> GAP in min >> YPLUS SA GAP: 2001 MAR 14 03:18:30.0004 2001 MAR 14 03:24:05.0004 5.58 -------------------------------------------------------------------------- From joe@nova.stanford.edu Fri May 3 09:25:58 2002 Received: from nova.Stanford.EDU (nova [171.64.90.123]) by magellan.stanford.edu (8.11.6/8.11.6) with ESMTP id g43GPwt10205 for ; Fri, 3 May 2002 09:25:58 -0700 (PDT) Received: from neptune.Stanford.EDU (neptune.Stanford.EDU [171.64.90.149]) by nova.Stanford.EDU (8.9.3/8.9.3) with ESMTP id JAA00180; Fri, 3 May 2002 09:26:31 -0700 (PDT) Received: from neptune.Stanford.EDU (joe@localhost) by neptune.Stanford.EDU (8.11.6/8.11.6) with ESMTP id g43GOMC12808; Fri, 3 May 2002 09:24:22 -0700 (PDT) Message-Id: <200205031624.g43GOMC12808@neptune.Stanford.EDU> X-Authentication-Warning: neptune.Stanford.EDU: joe owned process doing -bs X-Mailer: exmh version 2.0.2 2/24/98 From: Joe Twicken To: hinson@nova.stanford.edu, joe@nova.stanford.edu, rsimpson@nova.stanford.edu Subject: Re: ODR Notice: /users/z14/procODR/21231605 In-reply-to: Your message of "Fri, 03 May 2002 09:23:21 PDT." <200205031623.g43GNLB10184@magellan.stanford.edu> References: <200205031623.g43GNLB10184@magellan.stanford.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 03 May 2002 09:24:22 -0700 Content-Length: 946 Status: RO (1) Reprocessed with Goddard trajectory (2) There was no HGA motion compensation for these recordings >11100808.ODR p 15XRXIR1R203 15XRXIC1XX03 15XR1IF1S103 15XR1IS1T103 15XR1IS1T203 15XR1IS1T303 15XR1IS1T403 15XR1IS1T503 >11101006.ODR p 15XRXIR1R203 15XRXIC1XX03 15XR1IF1S103 15XR1IS1T103 15XR1IS1T203 15XR1IS1T303 15XR1IS1T403 15XR1IS1T503 >1110120D.ODR p 34XRXIR1R203 34XRXIC1XX03 34XR1IF1S103 34XR1IS1T103 34XR1IS1T203 34XR1IS1T303 34XR1IS1T403 34XR1IS1T503 >11101401.ODR p 34XRXIR1R203 34XRXIC1XX03 34XR1IF1S103 34XR1IS1T103 34XR1IS1T203 34XR1IS1T303 34XR1IS1T403 34XR1IS1T503 >11101559.ODR p 34XRXIR1R203 34XRXIC1XX03 34XR1IF1S103 34XR1IS1T103 34XR1IS1T203 34XR1IS1T303 34XR1IS1T403 34XR1IS1T503 >11101954.ODR p 34XRXIR1R203 34XRXIC1XX03 34XR1IF1S103 34XR1IS1T103 34XR1IS1T203 34XR1IS1T303 34XR1IS1T403 34XR1IS1T503 >11102152.ODR p 34XRXIR1R203 34XRXIC1XX03 34XR1IF1S103 34XR1IS1T103 34XR1IS1T203 34XR1IS1T303 34XR1IS1T403 34XR1IS1T503