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Proposal Identication No.: A1474 Date Received: 2000-Oct-02 09:22:47
Technical Page
Proposal Type: Long-term
General Category: Astronomy
Observation Category: Calibration
Total Time Requested: 5hr/mo + hr in Mar01 + 30 Hours
Proposal Title: Regular Monitoring of Calibration Parameters for the AO Receivers
ABSTRACT:
During September 2000, a considerable collective eort was spearheaded by Carl Heiles towards characterizing the
instrumental polarization for all available Arecibo receivers. Previously, during the rst two post-upgrade years,
calibration work had been performed at various times by Phil Perillat, Mike Davis, Mike Nolan, Ellen Howell, Carl
Heiles and members of the radio astronomy group. This has generated the current estimates for the Azimuth and
Zenith-angle dependencies of Gain and Tsys, and has produced beam maps, beam eфciencies, and polarization
characteristics for a number of the receivers. Here, we describe a plan for, a) making regular checks of the derived
polarization and other calibration parameters, b) enhancing the list of acceptable polarization calibrators over
4>RA>16 hr, which was not covered by the Sept 2000 observations,and c) completing characterization of 3
remaining receivers.
Name Institution E-mail Phone Student
Carl Heiles University of Califor-
nia, Berkeley
cheiles@astro.berkeley.edu 510 642 4510 no
I do NOT want to do remote observing.
Instrument Setup
430 G 610 L-wide 430 CH receiver L-narrow S-band receiver S-low C
Atmospheric Optical Instruments:
Special Equipment or setup: none
RFI Considerations
Frequency Ranges Planned
425 - 435
610 - 614
Entire L/narrow, L-wide range
Entire S-wide range
Entire C-band range
This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.
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This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz..
This proposal requires coordination with GPS L3 at 1381 MHz.
This proposal requires coordination with AFTWF within the band 425-435 MHz.
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