Observing with TRISPEC at UKIRT

The page below describes how to observe with TRISPEC especially at UKIRT. Please see also the other sections for independent parts on a telescope, such as changing slits/filters/grisms and taking image. And please note that the details given below are subject to change at any time.

Running up the Operating Software

The instrument control software run on a Sun workstation (named "demi") at the operation room, and on a RT-Linux PC (named "trispec") on the surface of the instrument. On demi, the array readout program and the communication programs to the telescope and IRPOL run. And, on trispec, the motor control program for the wheels, the internal focuses, and the wavelangth calibaration unit (WCU) run. The observers usually operate both computers from a Windows 2000 PC (named "triview") by using X-server software. To running up the operating software, do the following procedure.
  1. Log in to triview as user trispec.
  2. Double click on the "Tera Term Pro" icon, and log in demi as user trispec using SSH.
  3. Double click on the icon again, and log in trispec as user trispec using SSH.
  4. On demi, type "trispec_ukirt.sh". An image display and five xterm windows will open.
  5. On trispec, type "trispec_ukirt.sh". Two xterm windows will open.
  6. In the MESSIA window, type "messia.sh". The array readout program "messia" will start.
  7. In the DEMI window, type "m Init".
  8. After the TSS has informed you the serial line interface with the telescope control system is ready, in the TELESCOPE window, type "tel.sh".
  9. After the TSS has informed you the serial line interface with the IRPOL controller is ready, in the IRPOL window, type "irpol.sh".
  10. In the MC window, type "mc.sh". The motor control program will start.
  11. In the DEMI window, type "fs all init".
  12. In the DEMI window, type "wh all init".
  13. In the DEMI window, type "wcu rst".
Also, it is useful to open a web browser such as Netscape Communicator. By connecting to the running status page on trispec (local access only at the summit), you can check the various status of the instrument, the telescope, and IRPOL.

Running down the Operating Software

To running down the operating software, do the following procedure.
  1. In the DEMI window, type "obsmode dark".
  2. In the MESSIA, TELESCOPE, IRPOL, and MC windows, key in <Ctrl-C> individually.
  3. Log out demi and trispec, and log out triview.


Operating the Telescope via the Instrument

The observers are able to operate the telescope from the instrument via serial line interface. The following commands are available on demi. For detail command description, see also the description of the telescope serial line interface at UKIRT web site. For convenient when you type command on console, the set_target command usually accepts "hh:mm:ss.s" or "[+-]dd:mm:ss.s" format strings as inputs for RA or Dec. And outputs of get_demand, get_target, and get_tel_base commands are translate from radians to "hh:mm:ss.s" or "[+-]dd:mm:ss.s" format. If you add '-t' option, the inputs and outputs are not translated. By connecting to here (local access only at the summit), you can show the telescope current status. The status is usually refresh every five seconds.

Operating the IRPOL via the Instrument

The observers are able to operate IRPOL from the instrument via serial line interface. The following commands are available on demi. By connecting to here (local access only at the summit), you can show the IRPOL current status.

Data Format and Location at UKIRT

Raw data files are currently saved to directory /tmp on our workstation "demi" (is assigned as "trispec-sun.ukirt.jach.hawaii.edu" at JAC). Usually the instrument operator will create directories ukirt<HSTdate> (such as ukirt20010209) for each observing date in /tmp, and move the files to individual directories for each objects or data types (such as ngc7027_spec or dark)  under each date directory.

At the summit, the directory /tmp on demi are usually mounted the directory /trispec on kauwa. Therefore, the observers can find the raw data files in directory /trispec or /trispec/ukirt<HSTdate> on kauwa. However, since the directory /tmp on demi are no enough to storage raw data files for every observing date, the operator will remove them after back-up files for a few days.

The raw data files are saved as the standard FITS format. The files are separated for each detector.


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Last Modification Date: 2001/03/16
Last Modification Author: Makoto Watanabe <watanabe@z.phys.nagoya-u.ac.jp>