Failed attempts to upload revised firmware onto Cosmic Watch v2 muon detector
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I have accessed Jotham Gates Githib site – how do I now load his firmware onto my Cosmic Watch v2 muon detector? Good — if you’ve already reached Jotham Gates’…
What lowest noise level in temperature an amateur radio astronomer at 1420 MHz achieve?
At 1420 MHz (the hydrogen line), the lowest system noise temperature an amateur can realistically achieve depends on the quality of the antenna, feed, low-noise amplifier (LNA), and how much…
What is beamwidth of 1.2m prime focus satellite dish with typical F/D ratio?
For a 1.2 m prime-focus parabolic dish, the beamwidth depends mainly on the operating frequency (or wavelength), not strongly on the F/D ratio. A typical prime-focus dish has an F/D…
LNBs available for masers which can be observed with 1m dish
With a 1 m dish, observing astronomical masers is challenging but not impossible if you use a low-noise receiver and target the strongest sources. The most practical maser lines are:…
Where to putxhase Norsat 9000LD LNB needed for 22GHz maser observations
The Norsat 9000LD series is a professional Ka-band DRO LNB used for satellite communications rather than consumer satellite TV. Norsat still lists the 9000L series as a current product. I…
How do I add 3 logarithmic numbers together?
To add three logarithms with the same base: log(a) + log(b) + log(c) = log(abc) Example: log10(2) + log10(3) + log10(5) = log10(2 * 3 * 5) = log10(30) If…
Why do radio astronomers use temperature rather than dB or another measurement to measure noise?
Radio astronomers use temperature because the random electrical noise generated by a resistor is directly proportional to its physical temperature. This creates a natural link between thermal physics and radio…
Which battery should I use for the Parkside 12V cordless polisher/sander that I am using to make radio telescope mounts at LRO?
For the Parkside 12V cordless polisher/sander (the 75 mm model), there is little practical difference between using a PAPK 12 A3 and a PAPK 12 A4 battery. Both are 12…
What is difference between receiver temperature, spillover temperature, ambient temperature, background temperature in radio telescopes?
In radio astronomy, several different “temperatures” are used to describe sources of noise. They are all expressed in Kelvin (K) because radio noise power is conveniently represented as an equivalent…