Title
Modification Request #1 (Q# 20##)
1. Introduction
It has been discovered that the keywords which specify the position on the Earth are slightly different from the best known values.
There is no impact to actual behavior of observations, as this is simply a book-keeping error. All internal calculations in the antenna and LO1 control systems were already using the correct values.
2. Requirements
The antenna fits file headers contains the keywords and values for the GBT position as:
SITELONG |
38.433119 |
SITELAT |
79.839833 |
SITEHEIGHT |
824.595 |
This is slightly incorrect and doesn't match the values used for astronomy calculations in the antenna control.
The error is a simply a bookkeeping error, and did not impact any observations or calculations.
I'd like fix the bookkeeping error and apply the change today to indicate the official values:
SITELONG |
38.433121 |
SITELAT |
79.839835 |
SITEHEIGHT |
824.551 |
4. Design Strategy & Summary - For the software engineer to fill out
Simply update the values used to record these values.
- fits file change should be documented in the MR
- need to create new antenna fits files for unit tests
- need to run the gbtidl unit tests. There verify there are not any result changes
7. Test Plan
Signatures
APPROVED: To the best of my knowledge, the requirements section of this MR is complete and the other sections contain a reasonable plan forward. I have thought through this request, and believe it to be an important feature to implement or bug to fix.
ACCEPTED: I acknowledge that I have validated the completed code according to the acceptance tests.
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Approved by Sponsor |
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Approved by CCC |
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CCC Discussion Area
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JoeBrandt - 2021-01-29