jvla capabilities to be offered for semester 2013a n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
JVLA capabilities to be offered for semester 2013A PowerPoint Presentation
Download Presentation
JVLA capabilities to be offered for semester 2013A

Loading in 2 Seconds...

play fullscreen
1 / 7

JVLA capabilities to be offered for semester 2013A - PowerPoint PPT Presentation


  • 62 Views
  • Uploaded on

JVLA capabilities to be offered for semester 2013A. Claire Chandler. Capability definition and process. Considerations: Promises made in Program Operating Plan Promises made by EVLA construction project Technical and software readiness Commissioning readiness

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'JVLA capabilities to be offered for semester 2013A' - oleg-talley


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
capability definition and process
Capability definition and process
  • Considerations:
    • Promises made in Program Operating Plan
    • Promises made by EVLA construction project
    • Technical and software readiness
    • Commissioning readiness
    • Hand-over of user portal software and databases from Open Sky Software to NRAO on June 30, including PST
  • Proposal presented by Michael Rupen to ECSV group following discussions with software developers
  • Call for Proposals on July 9 for semester 2013A will be for first observations under “Full Operations”, but commissioning not complete by then
    • Concept of Shared Risk will continue for the moment
capability categories
Capability categories
  • Observing capabilities will be divided into 3 categories:
    • General capabilities for Full Operations
      • Well tested capabilities, if an observation fails because of software or hardware problem, it is returned to the dynamic scheduling queue
    • Shared Risk
      • Anything not under “general capabilities” that can be set up in the OPT and run through the OST but is not well tested
      • SR observers will receive 1 hr of test time to validate their correlator set-up and observing procedure
        • Success => submit science SB
        • Failure => come and visit for 1-2 weeks to help sort it out, or forfeit science time
      • All Shared Risk projects will be observing priority B
    • Resident Shared Risk
      • For stuff we really don’t know how to do yet, or is known not to be robust
      • Will relax the residency requirements in Full Operations: no minimum stay of 3 months, but still 1 month visit per 20 hours of observing time
general capabilities 1
General Capabilities (1)
  • 8-bit samplers
    • 2 basebands, 1 GHz BW each
    • Up to 16 subband pairs per baseband
    • Independently tunable
    • Independent bandwidths
    • Doppler setting per baseband
    • Baseline board stacking by factors of 2, to give up to 4096 channels per subband
    • Up to 16384 channels total
  • 3-bit samplers
    • 128 MHz subbands, contiguous in frequency within a baseband
    • Up to 64x128 MHz subbands to cover available receiver BW
    • Full, dual, or single polarization to give spectral resolutions 2, 1, 0.5 MHz
general capabilities 2
General Capabilities (2)
  • Phased VLA output for VLBI
    • 8-bit samplers
    • 1 or 2 x 128 MHz subbands, independently phased
    • 256 channels per subband
    • No subarrays or baseline board stacking
    • No simultaneous access to unused correlator resources
  • Subarrays
    • Up to 3 independent subarrays
    • 8-bit samplers, 128 MHz contiguous subbands only
    • Separate SBs for each subarray
    • Observer specifies which antennas go in each subarray
    • Some restrictions on number of antennas per subarray
  • Data rate restrictions for general capabilities
    • 20 MB/s
    • Also limit allowed dump time per array configuration
shared risk capabilities
Shared Risk Capabilities
  • One or two recirculation set-ups that have already been used by RSRO participants
  • Subarrays with 3-bit samplers
  • Fast dump modes up to 60 MB/s (8-bit), dump times >=50ms
  • More than 16 subband pairs per baseband with 8-bit
  • 3-bit with subband BWs narrower than 128 MHz
  • RSRO:
    • OTF mosaics
    • Phased array for all but VLBI
    • Real-timetransient detection
    • Pulsars
    • Complicated subarrays
    • General recirculation set-ups
pst requirements
PST requirements
  • For General and Shared Risk Capabilities, need a mechanism for users to specify their correlator set-up for the July 9 CfP
  • General Capabilities
    • SSS Group will create a special javaws tool that will output correlator configuration information
      • Standard NRAO defaults matching drop-down menu in PST
      • User-defined set-ups that can be uploaded to PST
      • Phased EVLA will be enabled under VLBA resources
  • Shared Risk Capabilities
    • Include in javaws tool, or validate through the RCT and provide resource ID in PST
  • RSRO
    • Free-form text in comment field, as before