Calculator to determine Local Standard of Rest
Admin
https://www.gb.nrao.edu/cgi-bin/radvelcalc.py
Radio observation in hydrogen line (1420MHz)
Information on Ka-band from Wikipedia
The Ka band (pronounced as either “kay-ay band” or “ka band”) is a portion of the microwave part of the electromagnetic spectrum. The designation “Ka-band” is from Kurz-above, which stems…
Video & screenshots of data collection in SDR Sharp from LRO-H2 10 March 2025-11 March 2025 showing frequency shifting up and down and also hot vs cold sky measurements.
This video shows the frequency varies cyclically during the 24 hour period. Screenshots from this video to show hot and cold sky – images can be magnified by hovering over…
Easy Radio Astronomy (ezRA) Radio Astronomy Software Suite from Github 8 March 2025
Click on link below to download mirrored copy of Easy Radio Astronomy from Github – https://github.com/tedcline/ezRA – 8 March 2025 https://www.astronomy.me.uk/wp-content/uploads/2025/03/ezRA-master-from-Github-080325.zip
Calculation to make on ezCol to measure dB increase over background
ezCol, the data collection part of ezRA suite (Easy Radio Astronomy, GitHub – tedcline/ezRA: Easy Radio Astronomy), looks like it measures voltage rather than power so dB calculation 20x not…
Nooelec SAWbird+ H1m Low Noise Amplifier (LNA) Product Specification Sheet
Click below to download product specification sheet: https://www.astronomy.me.uk/wp-content/uploads/2025/03/sawbird_h1_datasheet_revision_1080325.pdf
Analysing spare Nooelec SAWBird H1 LNAs at LRO 6 March 2025 using NanoVNA (Vector Network Analyser)
I used a NanoVNA vector network analyser to analyse my spare Nooelec SAWBIrd H1 low noise amplifiers. In each case, the level is around 0dB – so, when 40dB attenuation…
Procedure for using NanoVNA to test Nooelec SAWBird H1 LNA
Hi Andy, Sorry I’ve been driving all day so just seen this. I hope I’m not teaching you to suck eggs, but it seems from some of the posts that…
Nooelec SAWBird LNA checked on NanoVNA with 40dB attenuation at LRO 6/3/2025
As 40dB attenuation in the circuit, then need to add 40dB to reading on VNA. Once this is done, it is clear that the SAWBird produces roughly 40dB of amplification…