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 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.15 - 02 May 2008 - DennisEgan)
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 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.14 - 02 May 2008 - GlenLangston)
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  • Restored 43m operations with 1.5 to 3 GHz feed.
  • Tracking down some numerical questions concerning pointing.
  • MIT/LL will be returning in about a month to re-install .15 to 1.7 Feed
  • Need to work in Rohit and Rich Bradley's feed test on a weekend before re-installation.

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.13 - 02 May 2008 - JohnFord)
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  • Working on GUPPI timing issues to get designs to work at 200 MHz clock rate

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.12 - 02 May 2008 - MartyBloss)
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  • MUSTANG operational at UPenn
  • YGOR manager development continues

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.11 - 02 May 2008 - KarenONeil)
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  • Accomplishments
    • Project database complete
    • Deployment complete
    • User's manual overview 1st draft complete
    • Met with all telescope operators
    • Met with all scientific support staff
    • Implemented security
    • Help desk and online help implemented
  • Coming up
    • Next software release Monday; database fully accessible
    • User's manual overview release early next week
    • Only remaining MR is for weather/probabilities
    • Software team moving to bug fix mode
    • Science team testing software
  • Concerns
    • Only 4 more weeks! eek!

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.10 - 02 May 2008 - RonMaddalena)
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We supported 21 projects in 34 observing sessions, including 2 VLB sessions. The telescope was also scheduled for 17.75 hrs of maintenance, 2.5 hrs for software tests, and 2.5 hrs for receiver checkouts. Lost time is only approximate this week and, if I have estimated correctly, will be something like 5 hrs or 3.3%. The causes of lost time were:

  • LO1 RPC : 1.75 errors
  • Subreflector X1/X2 problems (multiple) : at least 1 hr
  • S-band noise diode : 0.7 hrs
  • Winds : 0.6 hrs
  • Too high slew rates (Az Oscillations) : 0.4 hrs
  • Active Surface Reset : 0.2 hrs

The LO1 errors were due to an undetermined limit to the length of a scan when Doppler tracking. The S-band diode problems happened when I was out of town and I don't know the problem's resolution. The X1/X2 subreflector problem should be treated as lost time but is not being logged as such; multiple observers have been affected. Operator logs show that the problem started and stopped without a cause reported.


 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.9 - 01 May 2008 - StevenWhite)
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  • PF1 feed change to 450 MHz
  • Round trip phase adjusted appropriate delay.
  • Holography Cables tested and relocated closer to reference horn.
  • Temperature Controller Installed.
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  • A video conference for software(pipeline) is scheduled for May 6.
  • Thermal Transition construction began.
  • Dewar cylinder complete.

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.8 - 01 May 2008 - MartyBloss)
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    • PLC interlock acceptance tests (Ax/El)
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    • PLC interlock acceptance tests (Az/El)

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.7 - 01 May 2008 - BobAnderson)
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  • The 45 Telescope was taken out of service this week because the motor controllers are experiencing intermittent faults. The faults are believed to be caused by high temperatures in the equipment enclosure. A plan for cooling the enclosure and repairing the controllers has been developed, but is awaiting project funding.
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  • The power outage test of GBT equipment and the servo system interface upgrade was performed this week, and several opportunities for improvement have been identified. The test will be repeated next week.

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.6 - 01 May 2008 - CarlBignell)
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Activities List

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Activities List

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Last Week =====

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Observations for proposals BB240 , GBT08A-020, GBT08A-021, GBT08A-043, GBT07B-031, GBT08A-033, GBT07A-087, GBT07A-066, GBT08A-014, GBT07C-033, GBT08A-047, GBT07C-056, GBT08A-039, GBT07C-049, GBT08A-081, GBT08A-082, GBT08A-040, GBT08A-062, GBT07A-051, GBT08A-041, GBT07C-060

Completed proposals GBT07C-049, GBT08A-081

Next Week ===== Observations scheduled for ** GBT08A-043 [ B] Jeremy Darling An OH Megamaser Survey at z~1 GBT08A-054 [ P ] Esteban Araya Correlated Variability of Astrophysical Masers II: Flares in IRAS18566+0408 GBT08A-076 [F B] Nissim Kanekar The nature of damped Lyman-alpha systems, as traced by their spin temperatures GBT08A-021 [F B] Jeff Mangum Formaldehyde Densitometry of IR-Bright Galaxies GBT07B-020 [F ] Ingrid Stairs The Pulsar Triple System in M4 GBT08A-011 [ B] Maura McLaughlin? Continued Radio Timing Observations of RRAT Sources GBT08A-033 [ B] Mike Blanton Testing the cold dark matter mass function with dwarf disk galaxies GBT08A-077 [F ] Fernando Camilo Studying the magnetar XTE J1810-197 GBT07B-031 [FP ] Steven Majewski Proper Motions of the Sagittarius Tidal Stream and the Shape of the Halo GBT07A-066 [ P ] Jim Braatz The Megamaser Cosmology Project GBT06A-033 [ P ] Howard Bond Search for SiO? Masers in Eruptive Variable Stars Similar to V838 Monocerotis GBT08A-002 [F ] Bruce Campbell Radar Studies of the Moon's Geologic History GBT08A-014 [ B] Jay Lockman On the Trail of Smith's Cloud GBT08A-047 [F ] Chris Carilli First limits to the IGM during cosmic reionization using the H 2p-2s transition GBT07C-056 [ P ] Jeremy Darling Formaldehyde in the Gravitational Lens PKS 1830-211 GBT08A-048 [ P ] Esteban Araya Correlated Variability of Astrophysical Masers I: monitoring of NGC7538 IRS1 GBT08A-039 [ B] Dana Balser Magnetic Fields in Photo-Dissociation Regions GBT06C-013 [ B] Steve Curran The Nature of High Redshift Intervening Absorption Systems GBT07C-005 [F ] Jeff Mangum Formaldehyde Densitometry of IR-Bright Galaxies BW089 [F ] Joan Wrobel Radio Emission from the Intermediate-Mass Black Hole in NGC4395 GBT05A-029 [ P ] Paul VandenBout? Search for Cold Molecular Gas at High Redshift BB255 [F ] Andreas Brunthaler Measuring the orbits of M81and M82 GBT08A-062 [F B] Jeremy Darling A "Blind'' HI Absorption Pilot Survey of the Local Universe GBT08A-040 [ P ] Pat Thaddeus A Search for the Negative Molecular Ions C4H-, C3N-, and CH2CN- ** Scheduled as F-ixed, P-rimary, B-ackup

Contact Information for 05/15/2008 - 05/29/2008 =================================== Proposal PI Bands Email [NRAO contact]


------------------ ----- -------------------- GBT08A-020 Jason Hessels 8 jhessels@science.uva.nl [Scott Ransom] BB240 Geoff Bower X gbower@astro.berkeley.edu [] GBT08A-076 Nissim Kanekar 4 nkanekar@nrao.edu [Jules Harnett] GBT08A-021 Jeff Mangum U jmangum@nrao.edu [Jim Braatz] GBT08A-033 Mike Blanton L blanton@nyu.edu [Jules Harnett] GBT08A-077 Fernando Camilo XCS fernando@astro.columbia.edu [Scott Ransom] GBT07A-087 Paul Demorest S pdemores@nrao.edu [Scott Ransom] GBT07B-031 Steven Majewski K srm4n@virginia.edu [Larry Morgan] GBT07A-066 Jim Braatz K jbraatz@nrao.edu [Jim Braatz] BD120 Shep Doeleman C sdoeleman@haystack.mit.edu [] GBT08A-068 Ryan Johnson L ryan.e.johnson@dartmouth.edu [Jules Harnett] GBT08A-013 Thushara Pillai L tpillai@cfa.harvard.edu [Jules Harnett] GBT07A-101 Clive Dickinson B cdickins@astro.caltech.edu [Brian Mason] GBT07C-068 Amy Lovell L alovell@agnesscott.edu [Toney Minter] GBT07C-013 Nissim Kanekar S nkanekar@nrao.edu [Frank Ghigo] GBT07C-079 Antonio Crapsi K a.crapsi@oan.es [Toney Minter] GBT06A-026 Nissim Kanekar 8 nkanekar@nrao.edu [Toney Minter] GBT07C-014 Keivan Stassun K keivan.stassun@vanderbilt.edu [Larry Morgan] GBT06C-048 Nissim Kanekar 8 nkanekar@nrao.edu [Toney Minter] GBT07B-029 Michael Kramer 8 mkramer@jb.man.ac.uk [Scott Ransom] GBT05A-029 Paul VandenBout? B pvandenb@nrao.edu [Ron Maddalena] GBT08A-082 Min Yun L myun@astro.umass.edu [Jules Harnett] GBT08A-072 Helene Courtois L h.courtois@ipnl.in2p3.fr [Rick Fisher] BB242 Jim Braatz K jbraatz@nrao.edu [] GBT08A-073 Viswesh Marthi 8 vrmarthi@ncra.tifr.res.in [Jules Harnett] GBT08A-041 Jeremy Darling S jdarling@origins.colorado.edu [Ron Maddalena] GBT07A-051 Mike Hollis 3468A jan.m.hollis@nasa.gov [Larry Morgan] GBT07C-060 Fernando Camilo S fernando@astro.columbia.edu [Scott Ransom]

Scheduled hours [backup] ==================== Category/Month-> May June July August Astronomy ~ 588 [327] 293 [002] 260 231 Maintenance ~ 42 [051] 167 195 168 Test & Comm ~ 52 [034] 7 0 0 Un-assigned ~ 62 254 291 345

Proposal Checkouts #[hrs]* ===================== Awaiting checkout - 0[0] Active checkout - 0[0] On Hold - 0[0] Schedule - 114[2140] Completed - 537[6535] * All but completed queue applies to GBT only proposals

Current backlog of Reg & RRS proposals [hours prior to 08A*] = 1079 [2005:56(5), 2006:194(10), 2007:829(40)] Backlog includes 112 hrs of monitoring projects 254 hrs of vlbi projects Total time to discharge [hours] = 4878 Includes 276 hours++ of monitoring (not Large or Spec) after trimester 08A

        1. hours of Regular & RRS proposals
        2. hours of Large proposals
        3. hours of VLBI proposals
* Includes projects that are on hold for trimester 08A ++ Time is counted in other break down as well. 08A

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.5 - 01 May 2008 - ToddHunter)
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    • completed on-telescope tests of MR 9C208 and 3C208
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    • new project note underway: Geometric Phase Correction for GBT Holography Data
    • work progressing on Active Surface MR to add thermal Zernike term
  • Pointing
    • Close comparison of inclinometer data and pointing data suggests that we have detected the local deviation of gravity at Green Bank (expected to be ~4 arcsec). Still checking the signs.

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.4 - 01 May 2008 - GalenWatts)
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  • Upcoming activities: A. Harris, UMd, will be performing upgrades to the Zpec hardware sometime this summer.

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.3 - 01 May 2008 - RandyMcCullough)
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Jason and J.D. repaired an LVDT module on IIOP5 to clear a patch of 64 disabled actuators.


 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.2 - 01 May 2008 - MartyBloss)
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PTCS program -- John

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PTCS program -- Marty

  • Servo
    • Initial tests of new sampling rates for samplers
  • Holography
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  • Upcoming work
    • PLC interlock acceptance tests (Ax/El)

 <<O>>  Difference Topic CommissioningMeeting08May02 (r1.1 - 01 May 2008 - RonMaddalena)
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%META:TOPICINFO{author="RonMaddalena" date="1209655021" format="1.0" version="1.1"}% %META:TOPICPARENT{name="CommissioningMeetings"}%

GBT Operations & Commissioning Meeting

02 May 2008

GB137 and by video-con from CV-Conf

AGENDA


Upcoming Activities -- Carl

Activities List


Operations


Scheduling Status -- Carl



Observing News -- Ron


GBT Telescope Operations -- Bob


Mechanical Division Operations -- Dennis


Microwave Electronics Operations -- Steve


Digital Electronics Operations -- Randy


RFI Group Operations -- Carla


Software Operations -- Amy


Computing and Network Operations -- Chris


Business Services -- Mike


43m Operations -- Glen


Project and Development Work


Dynamic Scheduling -- Karen


MUSTANG -- Brian


PTCS program -- John


CICADA program -- John


Ka-band Rx / Zpectrometer -- Galen


K-band Focal Plane Array -- Steve


Other Project Notes


Upcoming Meetings


Any other Business

-- RonMaddalena - 01 May 2008


Topic CommissioningMeeting08May02 . { View | Diffs | r1.15 | > | r1.14 | > | r1.13 | More }
Revision r1.1 - 01 May 2008 - 15:17 GMT - RonMaddalena
Revision r1.15 - 02 May 2008 - 13:48 GMT - DennisEgan
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