Intro

• lband receiver covering entire band
• mock spectrometer with 7 80 Mhz bands
• 1 ms sampling, 16 bit spectra
• 3 min on , 3 min off source

The data processing was:

• Compute the total power over a  1 Mhz bw centered at 1261.2 (aerostat band) for the 1 ms samples
  
• Also compute a 50 Mhz total power bandwidth around 1480 Mhz to check  compression.

The plots show the blanking of the aerostat toward AO (.ps) (.pdf)

• Top: total power vs time for 12 second rotation.
• Black: this is the total power for the 1261 aerostat signal
• The units are Tsys.
• Red: the total power vs time for the 50Mhz about 1480Mhz.
• the vertical scale is 100*tsys + 10.
• The negative going spikes has the lbw band compressing.
• The blank region around 10 seconds is the aerostat blanking toward ao.
• The blank region around 12 seconds is the aerostat blanking toward the san juan airport.
• Bottom: blowup showing the blanking toward AO.
• The aerostat is blanking for 1.42 seconds or 42.6 degrees  as it points at ao
• The blue line is where the mock spectrometer 16 bit spectra max out.
• We can't tell if the blanking region is centered on AO since the spectrometer has maxed out.
• Looking at the red 1480 Mhz compression, it looks like it may be centered a little after AO (in the rotation).

SUMMARY:

• The aerostat blanking toward AO has remained the same.
  

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