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From: =?iso-8859-1?Q?=22Ferland=2C_R=E9mi=22?= <RFerland@NRCan.gc.ca>
To: "'igsstation@igscb.jpl.nasa.gov'" <igsstation@igscb.jpl.nasa.gov>
Subject: [IGSSTATION-123]: IGb00 Review - TRO1
Date: Tue, 17 Aug 2004 14:51:05 -0400
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IGS Station Mail          17 Aug 11:51:22 PDT 2004      Message Number 123
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Author: R=E9mi Ferland

Dear IGS colleagues,

	Work was recently done to replace the antenna at the
"Tromsoe" (TRO1) station (04/07/13).
	Station coordinates estimates using the data after the change
1280, 1281 & 1282(preliminary) indicates that a significant
horizontal discontinuity has occurred:

Week			dN (mm)	dE (mm)	dH (mm)	=09

1280+1281+1282	  6		 10		12

	A new set of position/velocity estimate is also being
introduced in the cumulative solution to account for the
discontinuity.

	It is recommended that the station TRO1 (in IGb00) no longer
be used for reference frame purposes. If the situation were to change,
a new igsstation mail will be sent.

	If there is any objection or concern, do not hesitate
to contact me.

Best Regards,
Remi