X-Sympa-To: ids.analysis.forum Received: from hector.cls.fr (osis.cls.fr [62.161.32.21]) by hermes3.cls.fr (8.9.3/8.9.3) with ESMTP id UAA22982 for ; Fri, 12 Sep 2008 20:26:09 GMT Received: by hector.cls.fr (Postfix) id A94E7A6068; Fri, 12 Sep 2008 20:26:09 +0000 (GMT) Delivered-To: ids.analysis.forum@cls.fr Received: from cluster-e.mailcontrol.com (orange-103.cls.fr [62.161.32.14]) by hector.cls.fr (Postfix) with ESMTP id A31BD5E3AF for ; Fri, 12 Sep 2008 20:26:08 +0000 (GMT) Received: from ndjsnpf03.ndc.nasa.gov (ndjsnpf03.ndc.nasa.gov [198.117.1.123]) by rly23e.srv.mailcontrol.com (MailControl) with ESMTP id m8CKPsmE005857 for ; Fri, 12 Sep 2008 21:26:01 +0100 Received: from ndmsppt03.ndc.nasa.gov (ndmsppt03.ndc.nasa.gov [198.117.0.102]) by ndjsnpf03.ndc.nasa.gov (Postfix) with ESMTP id 706472D817F for ; Fri, 12 Sep 2008 15:25:27 -0500 (CDT) Received: from ndmsxgw04.ndc.nasa.gov (ndmsxgw04.ndc.nasa.gov [129.166.9.162]) by ndmsppt03.ndc.nasa.gov (8.14.1/8.14.1) with ESMTP id m8CKPbeJ012014 for ; Fri, 12 Sep 2008 15:25:37 -0500 Received: from NDMSEVS36B.ndc.nasa.gov ([129.166.9.59]) by ndmsxgw04.ndc.nasa.gov with Microsoft SMTPSVC(6.0.3790.3959); Fri, 12 Sep 2008 15:25:37 -0500 MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C91515.9F0A03A3" Subject: Correct SPOT-3 Offset Values Date: Fri, 12 Sep 2008 15:24:56 -0500 Message-ID: <6CBE15DABCBB6E419CD2B50ACBF5B5F74634C7@NDMSEVS36B.ndc.nasa.gov> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Correct SPOT-3 Offset Values Thread-Index: AckVFZ75sjVziI/zSOqZ5IuL+Aj/kA== From: "Lemoine, Frank G. (GSFC-698.0)" To: X-OriginalArrivalTime: 12 Sep 2008 20:25:37.0448 (UTC) FILETIME=[B7891280:01C91515] X-Mailcontrol-Inbound: 4L+qIWS+2d8e3ai1LmRsNGhmz2zQyNKrE8YraDX1CupY2S6ijrRmyg== X-Spam-Score: -2.1 X-Scanned-By: MailControl A-08-50-13 (www.mailcontrol.com) on 10.69.0.133 X-Validation-by: frank.g.lemoine@nasa.gov This is a multi-part message in MIME format. ------_=_NextPart_001_01C91515.9F0A03A3 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear Colleagues- I provide below a copy of a message sent by Laurent Soudarin of the IDS Central Bureau, following an inquiry into what values of OFFSET and Center of Gravity should be used for that spacecraft. Please be careful *not* to use the erroneous values in the files at =20 ftp://ftp.cls.fr/pub/ids/satellites/macromodels/spot3mod.pdf ftp://ftp.cls.fr/pub/ids/satellites/sp3mass.txt And at the corresponding CDDIS locations until these files are corrected. Best Regards, Frank Lemoine NASA Goddard Space Flight Center =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D Dear Frank, The reference document is ftp://ftp.cls.fr/pub/ids/satellites/DORIS_instrument_modelling_1G_envisat_2= 460_15.pdf The values for SPOT-3 are given page 30. *DORIS antenna reference point in the platform reference frame: XB=3D=A0=A0=A0=A0 -0.770 m YB=3D=A0=A0=A0=A0 -0.330 m ZB=3D=A0=A0=A0=A0 -0.950 m *Satellite centre of gravity XC=3D=A0=A0=A0=A0 -1.584 m YC=3D=A0=A0=A0=A0 -0.002 m ZC=3D=A0=A0=A0=A0 +0.023 m *Distance between antenna origin and phase center: h2 GHz =3D -0.315 m (Z a= xis) *The components of the centre of gravity - 2 GHz phase centre vector in a platform reference frame are thus: X (m) =3D xB (m) - xC (m)=A0=A0=A0=A0=A0=A0=A0=A0 =3D=A0=A0=A0=A0=A0=A0 +0.= 814 (m) Y (m) =3D yB (m) - yC (m)=A0=A0=A0=A0=A0=A0=A0=A0 =3D=A0=A0=A0=A0=A0=A0 -0.= 328 (m) Z (m) =3D zB (m) - zC (m) - h2 GHz (m)=A0=A0=A0 =3D=A0=A0=A0=A0=A0=A0 -1.28= 8 (m) *Satellite mass (on orbit): 1875.2 kg (values after manoeuver 10/09/96) These values above are also the ones used in GINS ... Spot-3 =A0=A0=A0=A0 x_masse =3D 1875.2_S ! au 10/09/96 =A0=A0 orig_cdm=A0=A0=A0 =3D 0._S =A0=A0=A0=A0 orig_cdp(:,1) =3D -(/+1.288_S,-0.328_S,-0.814_S/) avec X_GINS=3DN , Y_GINS=3D-T, Z_GINS=3DR ... The values in the documents ftp://ftp.cls.fr/pub/ids/satellites/macromodels/spot3mod.pdf ftp://ftp.cls.fr/pub/ids/satellites/sp3mass.txt seem to be obviously erroneous and will be corrected as soon as possible. Bon week-end Laurent ------_=_NextPart_001_01C91515.9F0A03A3 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Correct SPOT-3 Offset Values

Dear Colleagues-


I provide below a copy of a message sent by Laurent Soudarin
 of the IDS Central Bureau, following an inquiry into what
 values of OFFSET and Center of Gravity should be used
 for that spacecraft.

Please be careful *not* to use the erroneous values
 in the files at

ft= p://ftp.cls.fr/pub/ids/satellites/macromodels/spot3mod.pdf
ftp://ftp.cls.f= r/pub/ids/satellites/sp3mass.txt

And at the corresponding CDDIS locations until these files
 are corrected.

Best Regards,

Frank Lemoine
NASA Goddard Space Flight Center
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D

Dear Frank,

The reference document is
ftp://ftp.cls.fr/pub/ids/satellites/DORIS_instrument= _modelling_1G_envisat_2460_15.pdf

The values for SPOT-3 are given page 30.

*DORIS antenna reference point in the platform reference frame:
XB=3D=A0=A0=A0=A0 -0.770 m
YB=3D=A0=A0=A0=A0 -0.330 m
ZB=3D=A0=A0=A0=A0 -0.950 m

*Satellite centre of gravity
XC=3D=A0=A0=A0=A0 -1.584 m
YC=3D=A0=A0=A0=A0 -0.002 m
ZC=3D=A0=A0=A0=A0 +0.023 m

*Distance between antenna origin and phase center: h2 GHz =3D -0.315 m (Z a= xis)

*The components of the centre of gravity - 2 GHz phase centre vector in a platform reference frame are thus:

X (m) =3D xB (m) - xC (m)=A0=A0=A0=A0=A0=A0=A0=A0 =3D=A0=A0=A0=A0=A0=A0 +0.= 814 (m)
Y (m) =3D yB (m) - yC (m)=A0=A0=A0=A0=A0=A0=A0=A0 =3D=A0=A0=A0=A0=A0=A0 -0.= 328 (m)
Z (m) =3D zB (m) - zC (m) - h2 GHz (m)=A0=A0=A0 =3D=A0=A0=A0=A0=A0=A0 -1.28= 8 (m)

*Satellite mass (on orbit): 1875.2 kg (values after manoeuver 10/09/96)


These values above are also the ones used in GINS
...
Spot-3
=A0=A0=A0=A0 x_masse =3D 1875.2_S ! au 10/09/96
=A0=A0 orig_cdm=A0=A0=A0 =3D 0._S
=A0=A0=A0=A0 orig_cdp(:,1) =3D -(/+1.288_S,-0.328_S,-0.814_S/)

avec X_GINS=3DN , Y_GINS=3D-T, Z_GINS=3DR
...

The values in the documents
ft= p://ftp.cls.fr/pub/ids/satellites/macromodels/spot3mod.pdf
ftp://ftp.cls.f= r/pub/ids/satellites/sp3mass.txt
seem to be obviously erroneous
and will be corrected as soon as possible.

Bon week-end
Laurent

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