| Subject: Re: High Angle Range WU, what is the highest acceptable design value (PR - telescope)? |
| From: pbackus@seti.org |
| Date: 05/03/2005, 01:01 |
| Newsgroups: alt.sci.seti,sci.astro.seti |
I'm not involved with SETI@Home and I'm not sure what the "angle range"
is supposed to represent, but I'll speculate anyway. The start and end
declinations are well within the available range for Arecibo (roughly 0
to 36 degrees). The end RA of 37.066 doesn't make sense since RA is
usually measured in hours, from 0 to 23:59:59). The value is ok if RA
has been converted to degrees (0 - 360).
If the "angle range" represents the movement of the antenna in azimuth,
the value could be reasonable. The end declination of 18.81 degrees is
very nearly directly overhead (the zenith) for the telescope. Tracking
or scanning near the zenith requires a lot of motion in the azimuthal
direction.
Peter Backus
SETI Institute
Max Power wrote:
High Angle Range WU, what is the highest acceptable design value (PR
-
telescope)?
Why is this not indiacted in the SETI client itself?
Why is the work unit not tagged as [meta-data] invalid for the PR
telescope,
if such high Angle Ranges are reached?
Anyone ever see a wu with such an angle range...?
===============================
Name 20no03aa.23948.19874.742326.232
Recording Time 11/20/03 1:50 PM
Base Frequency 1,419,765,625
Start RA 22.818 End RA 37.066
Start DEC 24.85 End DEC 18.81
Angle Range 128.678
Receiver ao1420
Best Gaussian score 0.0 power 0.0 fit 0.0
Best Spike score 0.0 power 0.0
Best Pulse score 0.0 power 0.0
Best Triplet score 0.0 power 0.0
Tape Version 1.4
===============================