[IGSMAIL-4875]: IGS clock products

[Gerd Gendt.]

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IGS Electronic Mail      09 Mar 06:42:38 PST 2004      Message Number 4875
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Author: IGS ACC (GFZ)

Dear IGS Community,

Starting today with the IGS Rapid product 1261.1 the Rinex clock
and summary files will be those files from the Clock Product
Center (Ken Senior at NRL, see https://goby.nrl.navy.mil/IGStime/).

For the IGS Final products this will start at GPSweek 1259.

Also the clocks included in the SP3 files will be taken from the new
product,
so that the sp3- and clk-files are consistent.

The clock product will provide a much better realization of the IGS time
scale.
 (see also Ray, J., and K. Senior, IGS/BIPM Pilot Project: GPS carrier
  phase for time/frequency transfer and time scale formation, 4th
  International Time Scale Algorithms Symposium, at BIPM, Svres, France,
  18-19 March 2002, Metrologia , 40 (3), S270-S288, 2003 ;
  erratum, 40 (4), 205, 2003.)

The clock differences between all satellites and stations within one epoch
will be identical with the raw clock combination and
therefore the precise point positioning results will not be affected
by this change.

>From now onwards the new clock products can be downloaded from the IGS
global data centers.


Best regards

Gerd Gendt
Thomas Nischan


PS: All IGS orbit and clock products can also be downloaded
    from ftp.gfz-potsdam.de/pub/igsacc/product
    (see also http://www.gfz-potsdam.de/igsacc)