[IGSSTATION-47]: IGb00 Review - KOKB

"Ferland, Rémi" RFerland at NRCan.gc.ca
Wed Jun 16 06:41:53 PDT 2004


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IGS Station Mail          16 Jun 06:42:23 PDT 2004      Message Number 47
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Author: Rémi Ferland

Dear IGS colleagues,

	Work was recently done to replace the antenna and cable at the
"Kokee Park Geophysical Observatory" (KOKB). See:
http://igscb.jpl.nasa.gov/igscb/mail/igsstation/22
http://igscb.jpl.nasa.gov/igscb/mail/igsstation/28

	Station coordinates estimates using the data after the change
indicates a discontinuity:

Week		IGS03P33_RS99 minus weekly		Centers used
  #		dN (mm)	dE (mm)	dH (mm)		

1272		-38		-14		2		gfz,jpl,ngs
1273		-38		-22		2
cod,esa,gfz,jpl,MIT

Note that a similar discontinuity occurred about one and half
years ago at that station following an antenna/receiver change.
Both discontinuities appear to be of similar magnitude, but
opposite directions. This time, no radome is involved.

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

	Following FAIR, MAG0 and YSSK that had to be removed
from reference frame purposes in North Pacific area earlier
this year, this is the fourth station removed from that region.

Best Regards,
Remi,

Rémi Ferland
rferland at NRCan.gc.ca, 613-995-4002,  fascimile/télécopieur 613-995-3215
Natural Resources Canada, 456-615 Booth Street, Ottawa, Ontario K1A 0E9
Ressources naturelles Canada, 456-615 rue Booth, Ottawa, Ontario K1A 0E9
Government of Canada / Gouvernement du Canada



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