26 May 2004

To:        Art Freiley

From:      Dick Simpson

Subject:   Noise Calibrations at DSS 14


     Table below summarizes RSR results from noise measurements made at DSS
14.  For 20 May, X-RCP, S-RCP, and now S-LCP data have been analyzed; I will
fill out the table one more time when the X-LCP analysis is complete.

     The methods described in my two previous memos were applied here.

     Tndu  is the noise diode temperature from comparing ambient load levels
with levels when the noise diode was added to the ambient load.

     Tndl  is the noise diode temperature from comparing sky noise levels
(zenith) with and without the noise diode; a nearby  Top  was taken to be the
reference.


Channel  Quantity    Date     N  Minimum  Maximum  Average
-------  -------- ---------- --  -------  -------  -------
 S-LCP     Tndu   2004-04-08  4   11.30    12.20    11.60
 S-RCP     Top    2004-04-08  3   19.75    20.27
 S-RCP     Tndu   2004-04-08  2   14.67    15.74
 S-RCP     Tndl   2004-04-08  2   16.25    16.34
 X-LCP     Top    2004-04-08  2   18.48    18.49
 X-LCP     Tndu   2004-04-08  2   16.25    16.34
 X-LCP     Tndl   2004-04-08  2   17.16    17.76
 X-RCP     Top    2004-04-08  3   19.60    19.85
 X-RCP     Tndu   2004-04-08  2   20.48    22.96
 X-RCP     Tndl   2004-04-08  2   21.58    22.20

 S-LCP     Top    2004-05-13  5   23.49    24.16    23.71
 S-LCP     Tndu   2004-05-13  3   12.07    12.93    12.58
 S-LCP     Tndl   2004-05-13  3   12.08    12.36    12.20
 S-RCP     Top    2004-05-13  7   19.08    19.28    19.13
 S-RCP     Tndu   2004-05-13  4   15.60    16.16    15.81
 S-RCP     Tndl   2004-05-13  4   16.06    16.10    16.09
 X-LCP     Top    2004-05-13 10   17.16    17.37    17.28
 X-LCP     Tndu   2004-05-13  3   15.35    17.31    16.28
 X-LCP     Tndl   2004-05-13  3   17.40    17.60    17.50
 X-RCP     Top    2004-05-13  1                     18.34
 X-RCP     Tndu   2004-05-13  1                     23.76
 X-RCP     Tndl   2004-05-13  1                     23.58

 S-LCP     Top    2004-05-20  3   23.57    23.89    23.75
 S-LCP     Tndu   2004-05-20  4   11.36    12.07    11.75
 S-LCP     Tndl   2004-05-20  2   11.82    12.04    11.93
 S-RCP     Top    2004-05-20  3   18.73    19.08    18.85
 S-RCP     Tndu   2004-05-20  5   14.83    16.49    15.99
 S-RCP     Tndl   2004-05-20  3   15.82    15.86    15.83
 X-RCP     Top    2004-05-20  5   18.38    18.67
 X-RCP     Tndu   2004-05-20  2   22.60    23.05
 X-RCP     Tndl   2004-05-20  2   23.25    23.37

     Although there are some variations, the results from 13 and 20 May
continue to look consistent; the biggest difference is in the noise diode
temperature on S-LCP (added today).

     I'll attach the S-LCP spreadsheet to this message and will FAX the plots
of log(power) versus time.