Lessons learnt regarding interferometer yesterday!
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Interferometers need hardware bias tees for SAWBird H+ 1420MHz filters with cascaded amplifiers, (which they also need as AD8302 chip requires certain level power input on SMA connectors to work)…
Radio observation in hydrogen line (1420MHz)
Advice on how to progress with my interferometer based on AD8302 amplitude phase comparator board 8/1/2024
Correspondence with Jan Lustrup: Hi Andy…. You want to test changes of phase between the ports, not frequency! Use the same frequency generator to a 2 way power splitter. One…
Schematic of Ted Cline’s Additive Interferometer Nov 2023
Click below to view a schematic of Ted Cline’s Additive Interferometer. Andy http://astronomy.me.uk/wp-content/uploads/2024/01/Schematic-of-Ted-Clines-Additive-Interferometer-Nov-2023.pdf
Demonstrating likely presence of dark matter in Milky Way at LRO
The two slides below show velocity and mass distribution of Milky Way from LRO data 30/12/2023. Andy
Measuring data at 102.1 degrees elevation with Ptarmigan Array (Milky Way Hydrogen Map)
It appears my map with the extra 96.6 degrees elevation readings is now close to maximum I can achieve (see plot on previous post). I am going to try adding…
Results of adding 96.6 degrees elevation (beyond Zeinith by 6.6 degrees) to my galactic hydrogen map
Adding bricks to point the Ptarmigan Array beyond the Zenith 21/12/2023
Today I decided to find out what happens when I take the array to point other side of Zenith (ie > 90 degrees). Will it just give same data as…
Latest hydrogen radio map (1420MHz) Milky Way from LRO 20/12/23
Maps from latest data set 20/12/2023 (plots from ezCon ezGal and ezSky) – galaxy maps and uncorrected rotation curves for Milky Way: