X-Sympa-To: ids.analysis.forum Received: from hermes.cls.fr (hermes.cls.fr [62.161.32.1]) by hermes3.cls.fr (8.9.3/8.9.3) with ESMTP id QAA30277 for ; Fri, 20 Jun 2008 16:55:15 GMT Received: from hector.cls.fr (osis.cls.fr [62.161.32.21]) by hermes.cls.fr (8.13.1/8.13.1) with ESMTP id m5KGtE0v006072 for ; Fri, 20 Jun 2008 16:55:15 GMT Received: by hector.cls.fr (Postfix) id 47CAB147CA4; Fri, 20 Jun 2008 16:55:14 +0000 (GMT) Delivered-To: ids.analysis.forum@cls.fr Received: from cluster-e.mailcontrol.com (orange-102.cls.fr [62.161.32.13]) by hector.cls.fr (Postfix) with ESMTP id D6D80F29FD for ; Fri, 20 Jun 2008 16:55:13 +0000 (GMT) Received: from ndmsbar04.ndc.nasa.gov (ndmsbar04.ndc.nasa.gov [192.149.131.174]) by rly56e.srv.mailcontrol.com (MailControl) with ESMTP id m5KGsmFF004003 for ; Fri, 20 Jun 2008 17:54:56 +0100 Received: from ndmsxgw04.ndc.nasa.gov (ndmsxgw04.ndc.nasa.gov [129.166.9.162]) by ndmsbar04.ndc.nasa.gov (Spam Firewall) with ESMTP id 9696E40AF1C for ; Fri, 20 Jun 2008 11:54:44 -0500 (CDT) Received: from ndmsxgw04.ndc.nasa.gov (ndmsxgw04.ndc.nasa.gov [129.166.9.162]) by ndmsbar04.ndc.nasa.gov with ESMTP id QgqqS8lnj2rOZIBD for ; Fri, 20 Jun 2008 11:54:44 -0500 (CDT) Received: from smtp02.ndc.nasa.gov ([129.166.9.162]) by ndmsxgw04.ndc.nasa.gov with Microsoft SMTPSVC(6.0.3790.3959); Fri, 20 Jun 2008 11:54:44 -0500 Received: from crestone.local ([129.166.9.18]) by smtp02.ndc.nasa.gov over TLS secured channel with Microsoft SMTPSVC(6.0.3790.3959); Fri, 20 Jun 2008 11:54:44 -0500 Message-ID: <485BE0D2.9040109@nasa.gov> Date: Fri, 20 Jun 2008 12:54:42 -0400 From: Frank Lemoine User-Agent: Thunderbird 2.0.0.14 (Macintosh/20080421) MIME-Version: 1.0 To: ids.analysis.forum@cls.fr Subject: Preliminary Jason-2 POD Information (forwarded from Luca Cerri) Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 20 Jun 2008 16:54:44.0359 (UTC) FILETIME=[5701E970:01C8D2F6] X-Mailcontrol-Inbound: V55b9Y8Jd8xVF3wIIQtXaWhmz2zQyNKrE8YraDX1CupY2S6ijrRmyg== X-Spam-Score: -7.3 X-Scanned-By: MailControl A-08-50-03 (www.mailcontrol.com) on 10.69.0.166 X-Validation-by: frank.g.lemoine@nasa.gov Dear Frank and everybody, I'm glad to see that Jason-2 was successfully launched! Here is the data I am using for preliminary POD computations: Mass BOL (Kg) = 505.9 COG (m) = 0.9768 0.0001 0.0011 (values to be updated after station acquisition maneuvers) The following instruments reference points are taken from the satellite ICD provided by AAS. Doris antenna: Ref. Point (m)= 1.194 -0.598 0.703 Phase center 400 MHz (m) = 0.155 (Along Z) Phase center 2 GHz (m) = 0.319 (Along Z) Same ref point as Bruce's LRA: Ref. Point (m)= 1.194 0.598 0.70618 Range correction (cm) = 0.05 Note that the LRA Z coordinate differs from that in Bruce's email (0.6838) of about 2 cm. As far as the range correction is concerned, I don't dispose of any specific information regarding the behaviour of Jason-2 reflector. That's why I decided to start with the 5 cm offset (as for Jason-1 initially), and see what we find in the residuals. But there should be an elevation dependent correction similar to the one that we recently applied to Jason-1, at least in case multiphoton stations. GPSP : Ref. Point GPSP1 (m)=2.385794 -0.217000 -0.521790 (m) Ref. Point GPSP2 (m)=2.385794 0.217000 -0.521790 (m) Xgps: 0.966 0 0.259 Ygps: 0 -1 0 Zgps: 0.259 0 -0.966 These ref. point coordinates refer to the bottom of the choke ring, and are consistent with the 73.8 mm thickness mentioned in Bruce's email. Best regards Luca __________________________________ Luca CERRI Centre National d'Etudes Spatiales DCT\SB\OR 18, av Edouard Belin 31401 Toulouse Cedex 09 - FRANCE tel. +33 (0)5 61283549 fax +33 (0)5 61281855 bpi 1323 email luca.cerri@cnes.fr