Changes between Version 1 and Version 2 of docs/CommissioningPlan/P3.2

Timestamp:

01/19/21 11:34:48 (4 years ago)

Author:

kradhakrishnan

Comment:

--

docs/CommissioningPlan/P3.2

@@ -1 @@
- == P3.2        Telescope control – checking focus for different wavelengths == 
+ == P3.4        Telescope control – telescope mode, offset, and focal plane geometry estimation== 
 •       **Phase**               :       3  
 •       **Status**              :       Draft    
 •       **Category**            :       Nighttime testing (functionality and operability) (C4)
 •       **Recurrence**  :       once at commissioning
-•       **Duration**            :       30 minutes
+•       **Duration**            :       1 night
 **Description**
-•       Focus the telescope and check for chromatic variations (using different filters).
+•       For the correct telescope mode for SHARK-NIR, find the offset direction & magnitude (for the field-stabilized mode), verify the proper image orientation, pixel scale, field of view, and distortion at the SCICAM. Note that this may be performed with and without AO running.
 **Prerequisites**
-•       Atmospheric conditions: should be able to see bight stars on the sky (preferably close to zenith?).
+•       Atmospheric conditions: should be able to see bight stars on sky (preferably close to zenith?).
 •       Authorize SHARK-NIR on the SX side.
-•       Chose a star/field (or set of stars) which have emissions in all the required wavelengths to be checked.
+•       Suitable binary or astrometric targets.
+•       AO running for part of the test.
 **Procedure**
-•       Send the preset of the selected target.
-•       Focus the star for a given filter. If needed reduce the aberrations by changing/moving M2.
-•       Check if the same focus is good for other filters as well.
+1.      **Procedure** for image orientation
+        -       Select a filter
+        -       Place the de-rotator in the nominal "zero" position.
+        -       Issue a preset to move to a bright star (but not too bright to saturate)
+        -       Center the star in the science channel
+        -       Issue a pure elevation offset to the TCS of ca. 5” and verify expected motion direction on the SCICAM
+        -       Return to the on-axis position and repeat with a pure azimuth motion.
+        -       Issue a preset to move to a suitable astrometric binary (typically 5-8 arcsec separation) and center one star in the science channel.
+        -       Based on the published coordinates of the binary, issue the appropriate offset to center the other star.
+2.      **Procedure** for pixel scale/ plate scale
+        -       Select a filter
+        -       Issue a preset to move to a suitable astrometric binary to measure pixel scale (typically 5-8 arcsec separation)
+        -       Center the binary in the upper half of the SCICAM and take several frames. Average these frames
+        -       Move the binary to the lower half of the SCICAM and repeat.
+        -       Use the difference image (optionally flat-fielded) to verify the expected pixel scale. This gives two measures.
+        -       Repeat this for other filters.
 **Success criteria**
-•       No unexpected chromatic focus behaviour.
+•       The image orientation is as expected. The pixel scale and field of view of the SCICAM are as expected.
 **Notes**
 **LBTO support**
+•       Support from telescope operator (if needed).
+•       Presence of John Hill usually helps while collimating for the first time. 
+
 **Associated SHARK-NIR personnel**
-•       JF, LM, MdP, MM (from AZ)
+
 **Date performed and by whom**