The hilltop montoring system

Equipment:

omni ant (10->1400 Mhz), log periodic 2Ghz-> 10Ghz
filterbank, amplifiers, spectrum analyzer (100Khz to 22Ghz)
1 minute peak hold each freq band. 74 samples/band/day.
19 freq bands. Repeats a band every 20 minutes.
runs 24 hours a day since 1995 (further discussion)

Data products:

On the web:

daily average, time-freq plot of pwr, rms by channel

Accessible at arecibo:

idl: time-freq plot of power for any day.
Filters to extract subsets of the data.

Limitations:

Looks at the horizon (misses the aerostat/satellites).
High system temperature limits you to strong signals.

can't use lots of gain because of the strong signals.
Spectrum analyzer input temp is 25000K (or 250,000K with 10db pad in). Swept freq --> low duty cycle (401 points).

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