GBT Operations & Commissioning Meeting
AGENDA
Activities List
A rather complicated week to report on. We supported 17 projects in 32 observing sessions. The telescope was also scheduled for 19 hrs maintenance, 4.5 hrs of Mars Phoenix tests, 4 hrs of PTCS servo tests, 3.5 hrs of SCAL/RFI scans, and 1 hrs for receiver checkout. We were at half speed due to low temperatures for 14.4 hrs. Lost time amounted to 14 hrs (9.3%), over 8 hrs due to the weather, and ~3 hrs to the man lift problems on Wed. The details on lost time are:
- Winds (6 instances) - 8 hrs
- Upper Man Lift - 1.9 hrs plus 1.3 for repairs
- RFI (2 instances, somewhat expected) - 0.8 hrs
- Astrid/GFM/Turtle (4 instances) - 0.6 hrs
- Bad observing script - 0.6 hrs
- Spectrometer Setup Failure - 0.3 hrs
- Low Temperatures (2 instances) - 0.2 hrs
- Wrong Telescope Wrap - 0.2 hrs
- Wrong session ID - 0.2 hrs
No news other that what might be reported for Mustang.
GBT Telescope Operations -- Bob
Nothing happened this week. Oh,yeah, some folks got stuck in the GBT upper elevator, but got out okay. The elevator should be repaired next week after receipt of a new cable.
- Refrigerator failure resulted in removal and replacement of PF1; Current status cold and deployed.
RFI Group Operations -- Carla
- Operational Support:
- Minor BOS support - BOS Account Reconciliation issues due to daylight savings time
- Observing script writing support
- PlanOfRecordC22008
Allied Telesyn switches are removed and a new rack of media converters are in place in the servo room.
Basement student room "wiring" proceeds apace, will be ready in good time for the summer students. Other basement offices will be wired soon.
- Normal Spacecraft tracking
- We believe we have resolved the pointing interface file issues.
- MIT/LL staff will be in GB for two weeks starting April 14.
From Mike Shields; On our agenda is the following:
1) - remove Chalmers feed and Feed Box
a) remove some electronics in Feed box
b) cut access hole in box to remove cryo-cooler, replace with cooler
with spare (NRAO) - we need to make sure the spare cooler is at NRAO.
c) - re-install electronics and test Feed box
d) - install feed box and high frequency feed into 43m
e) - measure Chalmers feed on NRAO range
f) - ship Chalmers feed to Lincoln Lab
2) - repair partially failed amplifiers in trailer
3) - review performance of system and repair / replace components as needed
4) - measure / adjust phase match of corresponding V & H channels in trailer
5) - back-up and inventory software on computer disks in trailer
6) - reconfigure trailer firewall
7) - install new KVM switch
8) - at end of second week, characterize amplitude and phase of receiver
- Accomplishments:
- SDD group has spent the week working on the statistical analysis comparison between the new code and Dana's code (Nell and LittleNell?); A number of bugs are being found and fixed. It should be released to Dana early next week
- Additional information from Carl's database has been uploaded
- Concerns:
- The statistical analysis is taking considerably more effort than was planned, slowing things down
- Only 11 more weeks until test begin
MUSTANG -- Brian
- MUSTANG observing team in Green Bank for data analysis, planning meetings, and observation runs.
- Plan of instrument work for Green Bank and UPenn for summer 2008 outlined during the meeting by joint team.
- Plans continue for the use of YGOR for observation run during poor weather observing.
PTCS program -- Marty
- Servo replacement team continues development of specification.
- Project Mgmt team met with the Visiting Committee. Members were impressed with work to date and felt the plans were on the right track.
- A brief test of the new actuator home position file was attempted with MUSTANG on March 12. However, a readback of the actuator commanded positions showed that the new values were not read into the system. It is not understood why, and needs further research by software/PTCS. The new file has been left in the standard location.
CICADA program -- John
- GUPPI
- Installing new development system on faster computer
- Randy and Jason finished stokes block, vector accumulator, and are working on integrating the 10 GbE? block. This will finish off the first GUPPI version.
- Met with visiting committee group. We told them we could use more people, but we were making good progress like we are.
- KFPA Spectrometer
- Had telecon with Canadian group on spectrometer development. More to come on that later.
- 43m Spectrometer and Event detector
- 2048 channel, 1 polarization IBOB version is working.
- Need more software and second IBOB and to integrate it in with a Bee2 chip
- 4 input (two polarizations, two 500 MHz band) event capture is working.
- Need more software, more samples, a second IBOB
- Accomplishments since last report
- Andy Harris was in GB and performed some Zpectrometer maintenance on Friday the 7th, replacing a microcontroller and re-scaling the TP attenuation.
- Continued work on mechanical design details.
- CDR report due soon.
- GLINT (Green Bank Lunar Interferometer for Neutrino Transients) proposal was reviewed by the NRAO Science Council.
- Agreed to support submission of proposal to DOE, after extensive revisions and NRAO/AUI/NSF reviews.
-- RichardPrestage - 13 Mar 2008
Revision r1.14 - 14 Mar 2008 - 14:24 GMT - ChrisClark
Parents: WebHome > CommissioningMeetings
|
Content copyright © 1999-2007 by the contributing authors.
All material on this collaboration platform is the property of the contributing authors.
|
| |