X-Sympa-To: ids.analysis.forum Received: from hector.cls.fr (hector.cls.fr [62.161.32.9]) by hermes.cls.fr (8.9.3/8.9.3) with ESMTP id JAA04667 for ; Wed, 21 Feb 2007 09:35:38 GMT Received: by hector.cls.fr (Postfix) id A2C3FB3F9; Wed, 21 Feb 2007 10:04:38 +0000 (GMT) Delivered-To: ids.analysis.forum@cls.fr Received: from cluster-d.mailcontrol.com (orange-103.cls.fr [62.161.32.14]) by hector.cls.fr (Postfix) with ESMTP id B0D5612351 for ; Wed, 21 Feb 2007 10:04:37 +0000 (GMT) Received: from proxy.gao.spb.ru (gw-gao.nw.ru [195.14.12.7]) by rly09d.srv.mailcontrol.com (MailControl) with ESMTP id l1LA4GnQ014192 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 21 Feb 2007 10:04:22 GMT Received: from zm ([195.201.30.80]) by proxy.gao.spb.ru (8.12.8p1/8.12.8) with SMTP id l1LA4EnX014623; Wed, 21 Feb 2007 13:04:14 +0300 (MSK) (envelope-from malkin@gao.spb.ru) Message-Id: <200702211004.l1LA4EnX014623@proxy.gao.spb.ru> From: "Zinovy Malkin" Organization: Pulkovo Observatory (GAO) To: ids.analysis.forum@cls.fr Date: Wed, 21 Feb 2007 13:05:54 +0300 MIME-Version: 1.0 Content-type: text/plain; charset=ISO-8859-1 Subject: Re: [ids.analysis.forum] DORIS ground marks survey tie Reply-To: malkin@gao.spb.ru Cc: zmalkin@zmalkin.com Priority: normal In-reply-to: References: X-mailer: Pegasus Mail for Win32 (v3.11) X-Antivirus: avast! (VPS 0658-0, 13-12-2006), Outbound message X-Antivirus-Status: Clean X-Mailcontrol-Inbound: qq45fITmFd640RErIgVjpI6PYHaLGMlP X-Spam-Score: -0.6 X-Scanned-By: MailControl A-07-06-00 (www.mailcontrol.com) on 10.68.0.119 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from Quoted-printable to 8bit by hermes.cls.fr id JAA04667 X-Validation-by: laurent.soudarin@cls.fr Hi John, Although I'm not involved in DORIS data processing, this discussion seems to be somewhat strange for me! Usually, e.g. for SLR and GPS we prefer to refer the computed coordinates to the ground mark which is supposed to be more stable than the antenna reference point, and to do that, accurate value of the eccentricity vector is vitally important. Is this not the case for DORIS? Or you think I'm wrong in toto? Regards, Zinovy Date sent: Tue, 20 Feb 2007 10:16:04 -0600 To: ids.analysis.forum@cls.fr From: "John C. Ries" Subject: Re: [ids.analysis.forum] DORIS ground marks survey tie Send reply to: ids.analysis.forum@cls.fr >> >Dear colleagues, >> > >> >For most (but not all) DORIS stations, the site log gives the XYZ >> >tie between the current antenna reference point, and the ground mark (if >> >any) below the antenna. As far as I know, this information is used only >> >internally at IGN: this is a benchmark we use to monitor changes of the >> >antenna centring, be they accidental (skew due to the corrosion of the >> >support, break) or intentional (antenna change). I don't think the >> >analysis centres use it, nor does the IERS when combining multi-technique >> >solutions. >> > >> >Would you mind if this information is no longer published in the >> >site logs in the future? >> >> If it has no geodetic benefit, it seems reasonable to leave off. >> >> Best regards, >> JR >> >> >> Cliquez sur l'url suivante >> https://www.mailcontrol.com/sr/wQw0zmjPoHdJTZGyOCrrhg== >> D8aYMrbYGJM7rPGvqfFzfb5itCLYGRYLXJKSgnKkwlzRVSL!q9+XDbS4DWb602xoV33eOKXy!B >> xhqwEKvZylJ0bvpiXpU0KJIOcwaIs!ZRCx0j!ZkmPFihakQ2LBp00YVtweSD8D31Y3qdJNtkDp >> YoFjN9XZTJDjBO6A99jEC8lSW8Cx2VgcC >> si ce message est indésirable (pourriel). >> --------------------------------------------------------------- Dr. Zinovy M. Malkin e-mail: official: malkin@gao.spb.ru Pulkovo Observatory backup: zmalkin@zmalkin.com Pulkovskoe Ch., 65-1 Phone: +7-(812)-723-48-53 St. Petersburg 196140 Fax: +7-(812)-723-19-22 Russia Web: http://www.zmalkin.com ---------------------------------------------------------------