EVLA/VLBA/GBT Resources

NRAO Interactive Services Modification Request 2 S1 2011



1. Introduction

Any changes to the telescope specific resources

2. Background

3. Requirements

EVLA

Resources for the EVLA for the upcoming proposal call (deadline Feb 1, 2011) will change significantly. However, we will be in the situation that for the time frame between the Call for Proposals (currently scheduled for January 7, 2011) and the beginning of observing in the next D configuration (~September 2011), rapid response proposals will need to access the resources that are currently available. For the upcoming proposal call, the EVLA Resources will need to be changed in the following manner:

  1. Under Receivers, the 4 band 400cm 73 - 74.5 MHz selection should be grayed out (not available for selection).
  2. Under Back End, instead of the 2 WIDAR OSRO modes that we currently have, we should have
    • WIDAR OSRO, Full Polarization
    • WIDAR OSRO, Dual Polarization
    • WIDAR OSRO, Single Polarization

Each of these 3 selections should bring up a table similar to what we have now for the 2 WIDAR OSRO modes; the content of the tables can currently be found at http://www.nrao.edu/~mclausse/osrod.shtml The rows of these tables should be selectable (as the WIDAR OSRO modes are now). The information selected should make its way to the cover sheet in the Front End & Backend and Setup sections under VLA Resources.

WIDAR RSRO and WIDAR ECSO selections from the Back End drop-down menu should not change --- they should bring up a text box in which proposers may write a brief summary of what they need.

VLBA

For the VLBA we will be changing resources to accomodate initial use of the VLBA Sensitivity Upgrade for the 1 February 2011 proposal deadline. However, as for the EVLA, in the time frame between the Call for Proposals and when we actually start observing with the upgraded sensitivity (which will likely be sooner than September 2011; we'll have to tell you the proper date), rapid response proposals will need to access the current observing Resources.

For using the Upgrade, instead of having users select Observing Parameters, we would like to set them up (mostly) automatically. We would like to add a checkbox at the top of the Observing Parameters. The title should be Wideband Observing System and should have a checkbox to the right (this title and checkbox can span the same two columns as the current Observing Parameters). When the checkbox is checked, the Bandwidth should be set to 32 MHz (32 MHz is not currently an option for Bandwidth, but it does not need to be added to the drop-down menu, as this is the only way it will be selected), the Baseband channels should be set to 16, the Sample Rate should be blank, the Bits/Sample should be 2 and the Agg. Bit Rate should be set to 2048. All these options should then be grayed out (not selectable) so that the only option that is available to be selected is Polarization which should have the same drop-down menu as it has now (although I'd like to change RCP & LCP to Dual). Finally, when Wideband Observing System is checked, we also would like it to select specific Stations: If VLBA is checked, only La, Pt, Hn, Mk, Br, and Sc should be selected (with no other selection possible) and if HSA is selected, only GBT is selected (with no other selection possible). De-selection of some of the possible stations should be possible (and re-selection). The stations that are selected via Wideband Observing System may change before the proposal deadline, so we may be asking that the actual selection may be changed right up to January 7.

If the new Wideband Observing System checkbox is not selected, then everything should continue to work as it did before.

GBT

  • Remove the "K-Band Lower (18.0-22.4 GHz)" and "K-Band Upper (22.0-26.5 GHz)" receivers.
  • Add the following receiver: "W-band Shared Risk (68-92 GHz)". It should have the same modes as the Q-band receiver when the Spectrometer backend is selected. The allowed frequency range is 68-92 GHz. Use a default frequency of 90 GHz. Add the following comment: "The W-band receiver is a 2-beam receiver operating between 68-92 GHz. It will be available in shared risk mode only for the month of January 2012."
  • For the KFPA receiver:
    • Add the following modes:
      • 1 beam, 1 spectral windows, 2 polarization, at either 12.5 MHz, 50 MHz, 200 MHz or 800 MHz bandwidth
      • 1 beam, 2 spectral windows, 2 polarization, at either 12.5 MHz, 50 MHz, 200 MHz or 800 MHz bandwidth
      • 2 beam, 1 spectral windows, 2 polarization, at either 12.5 MHz, 50 MHz, 200 MHz or 800 MHz bandwidth
    • We probably need to alter the comments (Toney will provide this if necessary).

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


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 ALERT!)
  • Use %Y% if MR iscomplete (will display DONE)


Discussion Area

-- DanaBalser - 2010-10-19
Topic revision: r8 - 2010-12-17, DanaBalser
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