Radio observation in hydrogen line (1420MHz)

Nooelec’s documentation lists the SAWbird+ H1 (no 50 Ω “reference” termination present) at ≈0.8 dB NF and the versions that include the

Prerequisites Before testing the USB relay, ensure you have the following installed: Installation Steps bash Copy Code sudo apt-get update

From Alex Pettit 2-3/12/2025: Its related to the Feed Beam Pattern and the Shape ( f/D Depth ) of the

You’re thinking of a geodesic parabolic dish — a structure made from straight struts arranged in a triangular (geodesic) pattern that

Great question — this is a very common confusion when first applying the Nyquist theorem to radio astronomy. You do

I have installed usbrelay softwate on Ubuntu for my 4 relay control board (which works on Windows). Running the command

REM Identify data folder structure. REM The folder structure should be LRO folder with sub-folder called data. Save .txt data

Short answer: the SAWbird H1’s gain is essentially fixed by its RF amplifier bias network and SAW filter — within

Here’s what’s inside — i.e. the chips used: In short: R820T2 tuner + RTL2832U demodulator/ADC. Since you’re already familiar with