GB . PTCS . QuadrantDetectorProject

Quadrant Detector Project (2008)

Investigate the existing QD data and determine its utility for estimating pointing error, correcting heterodyne receiver half-power tracks and Mustang images. This project will be coordinated by Todd and comprise much of the second-year graduate research of Paul Ries.

Meetings

Past:
Next meeting:
- TBD: Paul's presentation of Project Note 64 draft

Tasks

Linear structure model
- Kim's powerpoint presentation from 14 Dec 2007
- Kim's PDF notes on in-situ QD calibration, matrices and correction approach
- see also Matlab code in /home/groups/ptcs/Delivered_2_3_08.zip and Delivered_2_6_08.zip
- Paul's analysis of the model
Mustang data analysis
- Brian's application of QD data to Mustang maps from TPAR_16 and TPAR_18
Half-power tracks
- Preferably on windy nights
- If wind is not available when scheduled, then use trajectories generated by /home/groups/ptcs/ccbobs/oof/gensmoothraster.py. This gives an occasional fast kick in az/el offset and back again to the half-power point. The scheduling blocks to use are HalfPowerTrajectory (for azimuth) and HalfPowerElTrajectory (for elevation) inside TPTCSPNT.

Background material

Quadrant Detector Instrumentation page
demonstrations of feed arm vibration
- half-power tracks, focus scans and QD data (2006)
- Paul's plots from TPAR_14 (2007)
Kim's reduced-order dynamical model of the GBT (draft) (comments)

-- ToddHunter - 05 Feb 2008

Attachment:	Action:	Size:	Date:	Who:	Comment:
Notes001.pdf	action	1613506	05 Feb 2008 - 04:04	ToddHunter	Notes on in-situ QD calibration, matrix derivation
ReducedOrderGBT.pdf	action	772588	05 Sep 2008 - 04:01	ToddHunter	Kim's Reduced-Order Dynamical Model (draft)
comments	action	1908	05 Sep 2008 - 04:04	ToddHunter	introductory comments on the model

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