system performance after hurricane maria

feb 2018

Plots:
Plots of gain before,after maria
compare gain before after maria

The hurricane

     Hurricane maria hit the observatory on 21sep17 with:
    Recovery from the storm included:

Degradation of the telescope gain:

    The telescope gain will be affected by:

Looking at the telescope gain before and after maria.

    x102 calibration from Pre and post maria were used to check the telescope gain. The calibration patterns do 4 strips through the source, each 6 beamwidths long.

 The table below has the telescope gain before/ after maria  by frequency:

Telescope gain before/after maria
rcvr
Freq
MHz
Before Maria
01jan16 - 18sep17
After maria
05nov17-27jan18
sbn
2380
.ps   .pdf
.ps   .pdf
sbh
3500
.ps   .pdf
.ps   .pdf
cband
5000
.ps   .pdf
.ps   .pdf
xband
9000
.ps   .pdf
.ps   .pdf

Each file contains two pages:



Comparing the gain before/after maria:

   Gain vs az for common sources tracked before and after maria (.ps) (.pdf)

Decrease in gain rise to set

Summary

Todo:

  processing: x101/171212/ see Readme file.

  home_~phil