I fit for a spectrally flat Trcvr and an overall efficiency. I got an efficiency of 80%, Trx of 180K. Note: I only had a total of ~350K +/- 50K to explain. This was on psa32 imaging and there was about a 20% overall flux calibration uncertainty.
The higher total of ~500K didn't show up until max redundancy operations. On Thu, Jan 15, 2015 at 2:22 PM, James Aguirre <[email protected]> wrote: > 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]> > 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 (office) >> (215) 898-9646 (lab) >> http://www.sas.upenn.edu/~jaguirre/ >> >> >> > > > -- > > 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/ > > -- 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/
