NIRSpec MSA Masking Template Parameters
JWST's NIRSpec MSA Masking template, available in the Astronomer’s Proposal Tool (APT), is used to apply one or more masks to the micro-shutter assembly (MSA).
Purple text indicates the parameter is Limited Access.
Boldface italics type indicates the name of an APT parameter or a value for a parameter.
Red text indicates restrictions on a parameter.
Black text indicates an important note.
Brown text indicates notes for the developers.
Green text indicates the name of the parameter used by Commanding.
Items in brackets - <value> - are required values.
Items in square brackets - [<value>] - are optional.
This engineering feature allows the user to apply a set of zero-potential or tri-state masks to the MSA; one each for the 171-side and the 365-side of the specified quadrants. Masking of multiple quadrants can be done in a single visit by specifying multiple quadrant numbers.
Note to developer: Add a NO PARALLEL special requirement by default. If the special requirement is removed, give an error.
Note to developer: Add a SPECIAL COMMANDING special requirement by default with the following text: "Special Commanding Approval will indicate confirmation that the MCE resolver conversion, tri-state, zero-potential masks and the predefined MSA configuration (allopen/allclosed) files needed for this visit will be in the ISIM file store before it begins". If the special requirement is removed, give an error.
The following parameters define MSA Masking.
|assign observation number||number|
|Observation Label||provide observation label||text||optional|
|Observation Comments||provide observation comments||text||optional|
|specify special requirements||choose from list||if needed|
|Template specific information|
|Mask Type||select a mask type||ZERO_POTENTIAL, TRI_STATE|
|Quadrant List||select a quadrant||choose from list|
MASK TYPE [MASKTYPE] = ZERO_POTENTIAL, TRI_STATE
This parameter specifies the type of mask to update.
QUADLIST [QUADLIST] = QUADRANT 1, QUADRANT 2, QUADRANT 3, QUADRANT 4
This parameter specifies the quadrant(s) to be masked. You may specify one to four unique quadrants. Specifying a list of multiple quadrants will execute the procedure on the quadrants one-by-one in the order specified.
Version 4 (January 22, 2020)
- Editorial change - previous published edit was left with some orange highlighting for review.
Version 3 (September 18, 2019)
- PROPINSTJWST-83804 - Added developer note to require PARALLEL SLEW ONLY. Added developer note to require SPECIAL COMMANDING. Removed requirement that both should be implicit SRs.
Version 2 (April 19, 2019)
- Editorial change (moved change log to main article)
Version 1 (June 15, 2017)
- This is the converted Word File from Chapter 39.