X-Sympa-To: ids.analysis.forum Received: from hector.cls.fr (osis.cls.fr [62.161.32.21]) by hermes.cls.fr (8.9.3/8.9.3) with ESMTP id SAA18719 for ; Thu, 21 Oct 2004 18:10:38 +0200 Received: by hector.cls.fr (Postfix) id 23F72D756A; Thu, 21 Oct 2004 16:10:38 +0000 (GMT) Delivered-To: ids.analysis.forum@cls.fr Received: from chappe.cnes.fr (orange-102.cls.fr [62.161.32.13]) by hector.cls.fr (Postfix) with ESMTP id AB62E125CA4 for ; Thu, 21 Oct 2004 16:10:36 +0000 (GMT) Received: from cnes.fr by chappe.cnes.fr id i9LGAZk17472; Thu, 21 Oct 2004 18:10:35 +0200 (MET DST) Message-Id: <200410211610.i9LGAZk17472@cnes.fr> Date: Thu, 21 Oct 2004 18:10:23 +0200 From: guitart Organization: CNES X-Accept-Language: fr MIME-Version: 1.0 To: ids.analysis.forum@cls.fr, Flavien.Mercier@cnes.fr, Adele.Guitart@cnes.fr Subject: Re: [ids.analysis.forum] TOPEX/DORIS POD - large residuals detected for2004-267=SEP-23-2004 References: <200410210926.i9L9Q8Y23945@cnes.fr> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Loop-Check: X-Validation-by: laurent.soudarin@cls.fr Hello, We have also observed important residuals during sept. 23-25 2004, on the standard MOE (cf. mail from Christian Jayles) and POE. Our elimination of the measurements during the preprocessing phase is not so sensitive to orbit errors. Maybe, we have rejected a little bit more measurements due to the non representativity of the MOE adjusted orbit (dynamic behaviour of the satellite). Anyway, we think that the delivered measurements are correct. The important rms observed in the residual is due, for us, to the bad dynamic modelisation during the manoeuvers. The way to overcome this problem is to improve the knowledge on the thrusts, which are distributed along the test period, and perform a new orbit restitution using the current delivered measurements, if it is possible. Best regards Flavien and Adele