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…
Tsys = Trx + Tant Where: Tsys = total system noise temperatureTrx = receiver noise temperatureTant = antenna temperature (everything seen by the antenna) Expanded form: Tsys = Trx +…
Calibration of radio telescopes usually uses cold sky and hot ground, rather than hot sky. However, for completeness here is hot sky. (Cold sky is best achieved by pointing at…
If you want a receiver with 20 MHz instantaneous bandwidth, there are only a few realistic options — and one stands out as the simplest choice. — Best simple answer…
In GNU Radio, “GUI inputs” are mainly implemented through Qt (modern, default) or WX (legacy) GUI blocks, plus a few message-based controls in the flowgraph. They let you change variables…
At the hydrogen line (21 cm wavelength, 1420 MHz), many common structural materials are essentially transparent provided they are non-conductive and not loaded with carbon or metal. For bracing a…
CHATGPT OPINION: For tracking astronomical masers (or any fixed celestial radio source that drifts slowly across the sky), I would actually lean toward the TV1 miniCASTER positioner rather than a…
Description on BROADCASTbargains website: TV1 Minicaster Satellite Dish Pointer A rare satellite dish pointing system, once part of a KA-SAT outside broadcast uplink van, is being offered for auction. The…
Your description matches the TV1 miniCASTER vehicle-mounted satellite uplink positioner much more closely than a conventional antenna rotator. From the material I found, the system was mounted on broadcast vans…
https://youtube.com/watch?v=4gVUFFxra-U&si=qBMd3ExnKxtG1oC0
Admin