celldes

Command:	celldes
Contexts:	Network socket, serial console. Applies only if the CCD is an "OTA" device.
Function:	Designates the intended function for each of the 64 cells.
Required Parameters:	cells=(64 S/V/D characters)
Optional Parameters:	dev=all|0|1

The string of cell designators must be a sequence of exactly 64 characters:

S	Designates Science readout use
V	Designates Video readout during exposure(*)
D	Designates a Dead cell which should be electrically floated

Order of the cells is row-major listing of the Catesian coordinate system of cell positions.

Usage for the cells:

xy07	xy17	xy27	xy37	xy47	xy57	xy67	xy77
xy06	xy16	xy26	xy36	xy46	xy56	xy66	xy76
xy05	xy15	xy25	xy35	xy45	xy55	xy65	xy75
xy04	xy14	xy24	xy34	xy44	xy54	xy64	xy74
xy03	xy13	xy23	xy33	xy43	xy53	xy63	xy73
xy02	xy12	xy22	xy32	xy42	xy52	xy62	xy72
xy01	xy11	xy21	xy31	xy41	xy51	xy61	xy71
xy00	xy10	xy20	xy30	xy40	xy50	xy60	xy70

Is sent in the string in the following order:

cells=xy00 xy10 xy20 . . . xy67 xy77

An actual command selecting all cells on "dev 1" but using xy11 for video would look like:

celldes dev=1 cells="SSSSSSSSSVSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS"

(*) CCD readouts, video or science, are "destructive" so a even though a "V" cell still gets included in the final readout, there is no valid image data.

Notes:

If dev= is omitted, the last default dev applies (which can be either 0 or 1, but not "all").

The FITS header for each exposure contains a nice self-documenting map illustrating which cells where video or floated, in addition to the 64-character keyword value CELLDES.

Various image displays may be rotated or flipped to match sky!

STA OTA devices have cellrow 0 on top instead of on the bottom (when column 0 is shown on the left.)