How to zero resistance measurements on VA40B Multimeter
I own the VA40B Multimeter – part of my testing regime for aerials involves measuring resistance. To ensure accurate resistance
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astronomy.network The Website of Lichfield Radio Observatory (LRO)
Andrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net
Direction of movement and Doppler shift in radio frequencies
In cosmology, a positive Doppler shift in radio waves means an object is moving away from us. This happens because the waves
Read moreChatGPT advice on how to look for cause of mal-performance on 1420MHz-tuned Yagi aerial 17/3/2025
1. Visual Inspection Check for: 2. Continuity and Resistance Testing Using a multimeter: 3. SWR Measurement Use an SWR meter or
Read moreFITS Software
The following is an extract from https://fits.gsfc.nasa.gov/fits_viewer.html: FITS Image Software Packages for image viewing, analysis, and format conversion The following
Read moreUsing TOPCAT Software for Windows to visualise and interpret SDFITS data (NASA single dish data format)
The SDFITS single dish data format (https://safe.nrao.edu/wiki/bin/view/Main/SdfitsDetails#:~:text=Briefly%2C%20SDFITS%20is%20a%20convention%20for%20storing%20single-dish,freedom%20to%20add%20any%20additional%20columns%20as%20necessary): The SDFITS convention was developed in the late 1980s. An early version was
Read moreM31’s Radial Velocity
For M31, Wikipedia gave the following: M31’s Radial Velocity: The Andromeda Galaxy (M31) is moving toward us with a radial
Read moreCalculator to determine Local Standard of Rest
https://www.gb.nrao.edu/cgi-bin/radvelcalc.py
Read moreInformation 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
Read moreSettings file for LRO-M1 Meteor Radio Scatter Experiment Spectrum Lab 15/3/2025
Click below to download file – ZIP file that needs to be unzipped to get USR file for Spectrum Lab:
Read moreM31 “Radio Map” using data from Green Bank 20m Radio Telescope 13/03/25
My first “map” of M31 – results of my first observing programme using the 20m dish at Green Bank Observatory.
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