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).
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.
Field | Details | Value | Notes |
---|---|---|---|
General Information | |||
Observation Number | assign observation number | number | |
Observation Label | provide observation label | text | optional |
Observation Comments | provide observation comments | text | optional |
Special Requirements | 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 |
General information
The following parameters are generic to all templates, and are not discussed in this article: Observation Number, Observation Label, Observation Comments, and Special Requirements.
Mask Type
MASK TYPE [MASKTYPE] = ZERO_POTENTIAL, TRI_STATE
This parameter specifies the type of mask to update.
Quadrant List
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.