[IGSMAIL-4033]: PIN2 Alert from SOPAC

[Michael Scharber]

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IGS Electronic Mail      08 Aug 11:37:30 PDT 2002      Message Number 4033
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Author: SOPAC

To users of PIN2 GPS data,

SOPAC must regretfully inform you that data acquired (anywhere) for the 
permanent GPS site PIN2 (Pinyon 2), prior to August 2, 2002, for the 
period of data from day 128 through day 213 of 2002.....should not be 
used!

Due to an oversight in the collection and archiving process affecting PIN1 
and PIN2 (since they share telemetry through a single telephone line) PIN2 
data for the period specified above is simply a COPY of PIN1 for the same 
day....with slightly different RINEX header information.

Steps have been taken to clean up this problem, repost 9 days of 
back-collected data from the PIN2 receiver for days 128 through 136, and 
prevent similar events from happening in the future.  For more 
information, please refer to a SOPAC memo describing in detail what 
happened and what is being done about it:
	
	http://sopac.ucsd.edu/other/pinyon_foulup.txt

Bottom line(s):

	a. DO NOT use any data related to PIN2 from the time period
	   of 2002-137 through 2002-213!  It is simply a copy of
	   data for PIN1!  Data for PIN2 during this period was 
	   irretrievably lost due to receiver memory exhaustion.

	   If you are an archive which has data for PIN2 for this period,
	   please make every attempt to remove it as soon as possible.

	b. DO NOT use data for PIN1 for 2002-127!  It is a copy of
	   data for PIN2!  As an artifact of SOPAC's local downloading
	   upgrade during this period, on the first day of the upgrade
	   PIN1 was affected by this problem.  Subsequent days afterward
	   PIN2 was affected.

	c. If you have data for PIN2 for any of the days 128 through 136
	   of 2002 please recollect them from SOPAC as soon as possible.


SOPAC wishes to extend every possible apology for this unfortunate event 
and the troubles it may have caused unwilling and unknowing users of PIN2 
data, as well as those archives which may serve PIN2 data.  Please direct 
any questions you have on this topic to:

	archive at sopac.ucsd.edu
	
Sincerest apologies,

SOPAC