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Telescope Offset Control

The basic Leaky guider software was not altered. However, Bob Marshall and Dave Mills did make changes to two routines: `PFCOM' (the TCS GWC interface) and `XTCS' (the TCS GUI). The commands added to `PFCOM' were:

nod-object -- move the telescope to the "nod" object position
nod-sky -- move the telescope to the "nod" sky position
nod-offsets? -- return the values of the "nod" sky offsets
nod-test {N} -- move between the sky and object positions N times

ICE uses `PFCOM' to communicate to the TCS and other subsystems. A new inspector window to setup for nodding was added to the TCS GUI. The operator uses this window to define the object and sky positions. The GUI publishes the sky offset values as GWC variables. Also, the GUI now responds to the GWC commands for `nod-object' and `nod-sky' by turning off the guider, moving the telescope and then turning the guider back on.


next up previous
Next: Description of the Nod Up: Modifications to the Control Previous: ICE User Interface
Jim DeVeny 2002-05-20