EVLA/VLBA/GBT Resources

NRAO Interactive Services Modification Request 2 T1 2010

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1. Introduction

Any changes to the telescope specific resources

2. Background

3. Requirements

• EVLA
  • We will either add the 74 MHz receiver for a special release (after June 1 deadline) or for the Oct 1 release.
• VLBA
  • Update documentation (MarkClaussen)
• GBT
  • GUPPI backend:
    • Add an option to choose between "Coherent Dedispersion" and "Incoherent Dedispersion".
  • Add K-band focal plane array (KFPA) as a new receiver. Call it "KFPA (shared risk)" in the menu.
    • When selected only the Spectrometer backend should be available.
    • Keep the following: Rest Frequencies, Sampling Level, and Desired Frequency Resolution
    • Add the table below. Here are the constraints:
      • The number of frequencies should match the number of spectral windows, except for when the number of beams is 7 whereby the user can input either the number of spectral windows or the number of spectral windows plus 1.
      • The widest frequency separation is 1800 MHz.
      • The sampling level works the same way as usual: if the bandwidth is either 200 MHz or 800 MHz then only 3-level is available, but if the bandwidth is either 12.5 MHz or 50 MHz then the user can choose either 3-level or 9-level.

No. Beams	No. Spectral Windows	No. Pol	Bandwidth (MHz)
4	2	2	12.5
4	2	2	50
4	1	2	12.5
4	1	2	50
4	1	2	200
4	1	2	800
4	2	1	200
4	2	1	800
7	1	2	12.5
7	1	2	50
7	1	1	200
7	1	1	800

4. Design

Technical lead should provide a brief description of how this will be implemented in the code.

5. Deployment Checklist

Documentation? Systems/hardware/networking things needed for deployment?

6. Test Plan

6.1 Internal Testing

6.2 Sponsor Testing

6.3 Integration/Regression Tests

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Signatures

APPROVED: I acknowledge that my request is fully contained in this MR, and if the Open Sky (or other NIS or PST developers) deliver exactly what I specified, I will be happy.

ACCEPTED: I acknowledge that I have validated the completed code according to the acceptance tests, and I am happy with the results.

Written	- - - - -
Checked	- - - - -
Approved by Scientific Sponsor	- - - - -
Accepted/Delivered by Sponsor	- - - - -

Symbols:

• Use %X% if MR is not complete (will display )
• Use %Y% if MR iscomplete (will display )

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Discussion Area

-- DanaBalser - 2010-02-18