Reducing noise in radio telescope systems
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Reducing noise in a 1420 MHz radio telescope setup (i.e., for detecting the hydrogen line) involves addressing both internal and external sources of interference. Here are the most effective steps…
Radio Astronomy
Can 3dB amplifier compensate for 3dB loss in filter at 1420MHz?
If I use a filter at 1420 MHz that causes 3 dB loss and in amplifier beforehand that gives 3dB gain, will that cancel it out? Not exactly — a…
Using long Yagi antenna tuned for 1430 MHz for 1420 MHz
A long Yagi antenna tuned for 1430 MHz can still work at 1420 MHz, but with reduced efficiency and some detuning effects. Here’s a breakdown of what you can expect:…
TV satellite frequencies in the USA
TV satellite frequencies in the USA vary depending on the satellite, provider, and whether the service is free-to-air (FTA) or encrypted. Here’s a general overview: 🛰️ Main Satellite Bands Used…
Beamwidth, Half-Power Beamwidth, Field of View
The amount of sky covered by a radio telescope is typically referred to as its field of view (FoV). Key Terms: FoV≈λD radians\text{FoV} \approx \frac{\lambda}{D} \text{ radians} where λ\lambda is…
Results LRO-H2 Mapping exercise 11/4/2025-1/6/2025 (processed 1/6/2025)
These are the results so far of my mapping exercise with the 1.5m parabolic solar cooker dish (LRO-H2): Powerpoint Presentation containing slides at bottom of this page: https://www.astronomy.me.uk/wp-content/uploads/2025/06/Results-LRO-H2-Mapping-exercise-110425-010625-010625.pptx Individual slides:
LRO-H1 Map 2 (cf Wikipedia H-Line Map July 2024 proc 260425@2200) – labelled
This version of the map has been relabelled, due to errors in the previous labelling system.
Cheapest way to make a new waveguide monopole
The waveguide in the centre of antennae sich as cantennae are made of a copper quarter wave monopole. The cheapest way to obtain a stiff enough short piece of copper…
First LRO PicoMuon detector weekly variation results 25 May 2025
This graph compares last week’s results with those found at a professional observatory in Finland (latter is neutron flux but gives basis for comparison as muons and neutrons go hand-in-hand).
Easy Radio Astronomy Software (ezRA)
LRO-H3 Radio Telescope (Alex Pettit H-Line Yagi)
Radio observation in hydrogen line (1420MHz)
Comparison of size of peaks on ezCol (ezRA) from LRO-H2 and LRO-H3 in last few days
See Powerpoint below: https://www.astronomy.me.uk/wp-content/uploads/2025/05/Comparison-data-collection-peaks-on-LRO-H2-and-LRO-H3-23-240525.pptx