Isn't the effective temperature just T_rcvr/efficiency when referring
T_rcvr with a matched input load back to the sky? Here the "efficiency"
includes the antenna S parameter and any mismatch between the antenna
and balun input. So efficiency = 300/170 = 57% for the numbers to work
out. I think the S_11 is better than -10 dB over the whole band, and
better than -15 dB in most places. So that's a pretty severe mismatch ...
There should also be some frequency dependence to T_rcvr, but you've
never tried fitting for that, right Danny?
On 1/15/2015 3:38 PM, danny jacobs wrote:
Even accounting for a <100% antenna efficiency?
On Thu, Jan 15, 2015 at 1:36 PM, James Aguirre <[email protected]
<mailto:[email protected]>> wrote:
So unless the d'Oliveira-Costa Tsky model is way wrong, we've got
about 130 K unaccounted for.
On 1/15/2015 3:24 PM, DAVID DEBOER wrote:
With better numbers from Rich and Matt, it looks like T(rcvr)
should be about 170 K
Dave
--
James Aguirre
Assistant Professor
Department of Physics and Astronomy
University of Pennsylvania
209 South 33rd Street
Philadelphia, PA 19104
(215) 898-9596 <tel:%28215%29%20898-9596> (office)
(215) 898-9646 <tel:%28215%29%20898-9646> (lab)
http://www.sas.upenn.edu/~jaguirre/
<http://www.sas.upenn.edu/%7Ejaguirre/>
--
National Science Foundation Fellow
Arizona State University
School of Earth and Space Exploration
Low Frequency Cosmology
Phone: (505) 500 4521
Homepage: http://loco.lab.asu.edu/danny_jacobs/
--
James Aguirre
Assistant Professor
Department of Physics and Astronomy
University of Pennsylvania
209 South 33rd Street
Philadelphia, PA 19104
(215) 898-9596 (office)
(215) 898-9646 (lab)
http://www.sas.upenn.edu/~jaguirre/
