NDLI: A calibration system for the Green Bank Telescope 4mm receiver: On-telescope, RFI-free calibration for 68

Content Provider	IEEE Xplore Digital Library
Author	Watts, G.
Copyright Year	2012
Description	Author affiliation: Nat. Radio Astron. Obs., Green Bank, WV, USA (Watts, G.)
Abstract	Calibration for spectral line observations covering 68-92 GHz on the Green Bank Telescope uses a different calibration scheme than lower frequency receivers. In addition and extremely important is that any calibration scheme must not generate radio frequency interference (RFI) to other experiments ongoing at the Green Bank Observatory. An asynchronous logic network interfaces between the telescope control system, a brushless AC motor and three bit position encoding to place or remove reflectors, absorber or a quarter wave plate in the beam of the feeds to enable observers to calibrate their data during observations or configure the receiver for Very Long Baseline Interferometer network observations. This system is free of RFI that schemes utilizing more commonly available technology create.
Sponsorship	IEEE Electron Devices Soc.
Starting Page	948
Ending Page	950
File Size	265387
Page Count	3
File Format	PDF
ISBN	9781467323024
e-ISBN	9782874870286
e-ISBN	9782874870262
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-29
Publisher Place	Netherlands
Access Restriction	Subscribed
Rights Holder	European Microwave Assoc
Subject Keyword	Temperature measurement Temperature sensors radiometer Brushless motors AC motors radio astronomy Receivers Calibration Feeds millimeter receiver radiometry logic circuits calibration
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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A calibration system for the Green Bank Telescope 4mm receiver: On-telescope, RFI-free calibration for 68–92 GHz observations

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