IRTF LTCS ChangeLog

2009 Aug

Moved documents fro lt_info to the old/ directory. lt_info produced the Laser
Pointing Data 'tcs_data.txt' for tcs1. TCS1 is decommissoned in 2008Aug.
TCS3 now produces this tcs_data.txt data.

Dec 2005

12/08/2005 - Issues with lt_info was reviewed and some changes made. See summary below:

   1. FOV  is 0.11

      Our FOV is 0.111 deg. Our off-axis guide stars are from 100 to 200 arc
      radius. 200x2 = 400 as or 0.11 degs.
      Alan already review this with the TOs.

   2.  Slewing.

      When we slew, the tcs reports the slew destination position (or future
      track position). There is no crossing path problem.

   3. Update rate:

      Our URL update rate is now 5 sec. 
      We changed it from 15 to 5 sec about Dec 2nd.

   4. Parked condition.

      If the HA and DEC values are not changing (ie the telescope is parked),
      the the lt_info program will set the IMPACTED flag to NO.
      The Keck laser wavelength is 589nm, so no science instrument is affected.
      Only our guider camera is affected by the laser.

      This changes was made on Dec 08.

   5. There is a TIMESTAMP field in the URL file.

      If the timestamp is > 3 mins, Then keck will assumed the IMPACTED flag
      is NO. In general, do not run lt_info unless you are being impacted.

 
Dec 2002


11/04/2002 - Keck's Email with several details on November run and LTCS
actions from from MKLGSTWG. 021104.dsummers_email.txt


Dec 2001

Tony was assigned task of implementing the LTCS web interface on 12/07. We
are trying to implement the system for keck's first test on 12/11.

Here are a series of emails about the LTCS leading upto its announcment:


12/06 - Tony assigned to project: 011206.alan_email.txt 
12/07 - 15 second polling rate: 011207.from_keck01.txt 
12/07 - more keck emails: 011207.from_keck02.txt
12/08 - more keck emails: 011208.from_keck.txt
12/10 - Tony's announcment:011210.tony_email.txt