ICIMACS for the Wise Observatory 2Kx2K Camera: Software Notes

12/23/97 : JAM

(ICIMACS = Instrument Control and Image Acquisition System


SCSI Bus Activity:
Any other computer sharing the SCSI bus with the IC must limit its bus activity. The computer should only stay on the bus long enough to transfer images to their final location, as the IC can't tolerate long delays in accessing the bus.

Overscan and Binning
The overscan taken by the IC may be changed automatically following changes in binning. This is done in order to keep the number of overscan pixels a multiple of the binning factor.

2 Amps and Binning
In 2 amplifier mode, x binning values that are not factors of the number of data pixels will result in dark columns down the center of the image. These are due to data pixels being binned with overscan pixels in the final image.

2 Amps and ROI (Region-of-Interest)
In 2 amplifier mode, the ROI selected will be adjusted so that it is symmetric around the detector centerline. The size of the area selected will be increased in one direction until the area is centered.

ROI and Binning
It is up to the user to select the ROI so that the number of pixels selected is a multiple of the binning factor

Mount points on startup
A valid mount point must be explicitly selected on startup, even if the path shown on screen is the one desired.

Choosing a machine address
While any two letter combination is valid as an address when communicating with the IC, the address WC has some important functions. I would recommend that your machine call itself "WC" in messages with the IC.

Telescope and instrument controllers interface
If desired, telescope and instrument data can be embedded in the image FITS header by enabling them in the WISE.INI file, and sending formatted strings to the IC on request.

To save telescope data:
Set TCENABLE=T in WISE.INI
If your machine is called "WC" (see above), the IC will send the string IC>WC TCSTATUS before each acquisition cycle. Respond to this message with a string of the form WC>IC STATUS: keyword=value keyword=value .... The IC will append these keywords and values to the end of its FITS header after formatting them to the FITS standard.

To save instrument data:
Set IEENABLE=T in WISE.INI
If your machine is called "IE" (see above), the IC will send the string IC>IE ISTATUSbefore each acquisition cycle. Respond to this message with a string of the form IE>IC STATUS: keyword=value keyword=value .... The IC will append these keywords and values to the end of its FITS header after formatting them to the FITS standard.

Of course, the IC does not care whether what you are sending represents telescope status, instrument status, or a grocery list. It thus provides an easy way to get any information you may find relevant into your image headers.


Imaging Sciences Laboratory
Revised: December 23, 1997 [jam]