Subject: JEM-X Monday Meeting 2004-07-26

Present: CAO, SB, CBJ, NJW

JEM-X status:

   Addendum to last meeting: Switching the DFEE off in JMX2 caused a
   countinuous drop of temperature in JMX1 reaching 3 deg after 12 hours
   (then it went into the radiation belt). No visible change in JMX1
   performance. It looked as if the temperature could drop even more,
   but the picture may be disturbed by satellite maneouvers due to the
   perigee approach.
   
   The occurrence of 8 MHz CPU state in the DFEE for a longer period:
   
   This should be reported as a "major anomaly" which requires a patch
   in the DPE software. This is being investigated (Gregorsz has come
   up with a solution).
   
 (quoted from an email from Soren)
   JEM-X1 was operating with the CPU mode 8 MHz, 1 Wait State during
   all of orbit 206 and in orbit 207 until scwin 42.
   Data taking included scwins up to 40 and started again in scwin 46
   with the nominal CPU mode of 16 MHz and 0 WS.

   These data have a dead time which is 2.5 times higher than normal
   and the spectra look fishy at the lower end due to poorly understood
   behavior in this mode. These data should be used with extra care!
   
IPF file transfer:

   IPF files from the instrument station are now copied to a directory
   at an ISDC scratch area: /isdc/pv/jemx/ipf due to a security risk by
   having the pc accessible from the outside world. Soren has made
   a script that will ftp the IPF files to DSRI (and move the files
   to a subdirectory 'sent' when sent). Soren will take care of the
   daily transfer, at least to begin with.
   
AOB: none

/NJW
   
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Niels J. Westergaard
Danish Space Research Institute
Juliane Maries Vej 30, DK 2100 Copenhagen O
Phone: +45 35 32 57 05; FAX:  +45 35 36 24 75