[IGSMAIL-4430]: recent satellite clock events

[Jim Ray (NGS 301-713-2850 x112)]

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IGS Electronic Mail      09 Jun 05:59:23 PDT 2003      Message Number 4430
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Author: Jim Ray

Based on the IGS Rapid clock products (see website at
<http://timescales.nrl.navy.mil/IGRT/1221/>), users may have noticed the
following events:

PRN05/SVN35 -- A large reset took place late on 02 June at which time a
  NANU was issued setting it unusable until further notice.  The IGS has
  had no trouble generating orbit and clock products since that time
  although many receivers are unfortunately not reporting data (see
  Stefan Schaer's IGS Mail #4371 on 08 May).

PRN22/SVN22 -- It seems to have been turned off permanently as of 28 May
  even though no NANU has been issued.  It was set unusable last 03 December
  but the IGS was tracking it without problems.

PRN31/SVN31 -- The clock apparently developed severe problems on 06 June
  which continued through at least the following day.  I have not seen any
  NANUs on this yet, but the broadcast clock performance was clearly
  affected.