Received: from cluster-jaune.cls.fr (cl1-jaune.cls.fr [80.245.34.146]) by sympa.cls.fr (8.13.1/8.13.1) with ESMTP id n0JIA34k024495 for ; Mon, 19 Jan 2009 18:10:04 GMT Received: by cluster-jaune.cls.fr (Postfix) id AF87B14D0C4; Mon, 19 Jan 2009 18:18:50 +0000 (GMT) Delivered-To: ids.analysis.forum@cls.fr Received: from SRV-XCHANGE-2K3.pc.cls.fr (unknown [10.1.255.63]) by cluster-jaune.cls.fr (Postfix) with ESMTP id A8D9D14CFD1 for ; Mon, 19 Jan 2009 18:18:50 +0000 (GMT) X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C97A61.26B7AF16" Date: Mon, 19 Jan 2009 19:10:03 +0100 Message-ID: <849DBCC52C7B314EAA3461E1130C2B2810269B@SRV-XCHANGE-2K3.pc.cls.fr> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: DORIS station network for IDS combination thread-index: Acl6YSZhcuFOM7tjR1ykoEAWV58EhA== From: "Jean-Jacques Valette" To: X-Validation-by: frank.g.lemoine@nasa.gov Subject: [ids.analysis.forum] DORIS station network for IDS combination This is a multi-part message in MIME format. ------_=_NextPart_001_01C97A61.26B7AF16 Content-Type: text/plain; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable Dear colleagues =20 A combination of the IDS weekly solutions for station coordinates and EOPs = is in preparation as a contribution to the ITRF2008 call for participation.= =20 Presently 7 ACs intent to participate delivering their best solutions (20th= Jan. deadline) after a several months period of model and strategy validat= ion. In the coming days a list of all the solutions available will be on th= e IDS web. =20 Concerning the stations network status, 3 situations will be considered: - stations that should never be used, - stations that should be used partially, - stations with breaks in position or velocity at a given epoch (SOLN= parameter in the SINEX files). Each of them corresponds to a given file at ftp://ftp.cls.fr/pub/ids/combin= ations/ITRF2008-IDS/ =20 There are adapted from the DPOD2005_discontinuities.txt file. There are sev= eral motivation for that. One is naturally an update. Another is that the c= ombination software (CATREF-LAREG/IGN) manage the station solution numbers = (i.e. breaks) of each series in an homogeneous way which is not the case at= the AC level. Also it seems reasonable that no solution number is associat= ed to a period in which data are not used. Finally, several breaks were app= lied with justification of apparent breaks in time series. For some station= s, those unknown breaks have been removed at least provisionally before a m= ore complete investigation with all series. =20 The main changes are summarizes hereafter.=20 =20 / Updates: REUB & PDMB data not to be used during equipment problems (cable= inversion) in 2008 / Remove unknown breaks: DIOA/FAIA/KESB/MORB/MSOB/RIPB/ROTA/SPIB/STJB / New break: SODA (97.5) in velocity =20 An open point concern the application of the DORIS USO warming delay which = is typically of 4 weeks. From time series coordinates, additional period of= datat remove may be applied in several cases (EASB/HKBK/HELA/JIUB/KESB/KIT= A/KIUB/KRAB/HBMB/KRAB/MATB/MORA/PAQB/RIDA/THUB/SPJB/RIPB/SAKA/SANB). This issue will also be analyzed with all series, the breaks will then be u= pdated if needed before the weekly combination. =20 Thanks in advance for any comment or suggestion =20 Best regards =20 JJ Valette =20 =20 =20=20=20 ---------------------------------------------------------------------------= ------------------------------------------------------ Jean-Jacques VALETTE (jvalette@cls.fr)=20 CLS - COLLECTE LOCALISATION SATELLITES 8-10, Rue Herm=E8s Parc Technologique du Canal=20 31520 Ramonville St-Agne, FRANCE=20 Tel (+33) 05.61.39.47.62=20 Fax (+33) 05.61.39.48.06=20 www.cls.fr =20 =20 ------_=_NextPart_001_01C97A61.26B7AF16 Content-Type: text/html; charset="iso-8859-15" Content-Transfer-Encoding: quoted-printable

Dear colleagues

 

A combination of the IDS weekly solutions for station coordinates and EOPs is= in preparation as a contribution to the ITRF2008 call for participation.

Presently 7 ACs intent to participate delivering their best solutions (20th Jan. deadline) after a several months period of model and strategy validati= on. In the coming days a list of all the solutions available will be on the IDS web.

 

Concerning the stations network status, 3 situations will be considered:

-      = stations that shoul= d never be used,

-      = stations that shoul= d be used partially,

-      = stations with break= s in position or velocity at a given epoch (SOLN parameter in the SINEX files).<= o:p>

Each of them corresponds to a given file at ftp://ftp.cls.= fr/pub/ids/combinations/ITRF2008-IDS/

 

There are adapted from the DPOD2005_discontinuities.txt file. There are several motivation for that. One is naturally an update. Another is that the combin= ation software (CATREF-LAREG/IGN) manage the station solution numbers (i.e. break= s) of each series in an homogeneous way which is not the case at the AC level.= Also it seems reasonable that no solution number is associated to a period in wh= ich data are not used. Finally, several breaks were applied with justification = of apparent breaks in time series. For some stations, those unknown breaks have been re= moved at least provisionally before a more complete investigation with all series= .

 

The main changes are summarizes hereafter.

 

/ Updates: REUB & PDMB data not to be used during equipment problems (cable invers= ion) in 2008

/ Remove unknown breaks: =A0DIOA/FA= IA/KESB/MORB/MSOB/RIPB/ROTA/SPIB/STJB

/ New break: SODA (97.5) in velocit= y

 

An open point concern the applicati= on of the DORIS USO warming delay which is typically of 4 weeks. From time series coordinates, additional period of datat remove may be applied in several ca= ses (EASB/HKBK/HELA/JIUB/KESB/KITA/KIUB/KRAB/HBMB/KRAB/MATB/MORA/PAQB/RIDA/= THUB/SPJB/RIPB/SAKA/SANB).

This issue will also be analyzed wi= th all series, the breaks will then be updated if needed before the weekly combination.

 

Thanks in advance for any comment or suggestion

 

Best regards

 

JJ Valette

 

 

=A0=A0

------------------------------------------------------= ---------------------------------------------------------------------------=

=A0=A0 Jean-Jacques VALETTE (jvalette@cls.fr)
 =A0 CLS - COLLECTE LOCALISATION SATELLITES
 =A0 8-10, Rue Herm=E8s=
   Parc Technologique du Canal
   31520 Ramonville St-Agne, FRANCE
   Tel (+33) 05.61.39.47.62
   Fax (+33) 05.61.39.48.06
   www.cls.fr

 

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