Radio observation in hydrogen line (1420MHz)

This is very much a work in progress, so there isn’t a definitive answer from this post……. Andy Hi Ted,

If your “two cables joined in the middle, held aloft on poles with a single feed down the centre” is

The video from this meeting is available here:

Good question — you’re asking about the heart of radio interferometric imaging: how to take the signals from multiple antenna

Two monopoles at 90 degrees in cantenna One connects to splitter immediately Two connects via coax either 1/4 wavelength or

How do I normalise data from multiple radio telescope systems so I can combine them together? Great question, Andrew. Here’s

Provides an alternative to the Nooelec SAWBird H1 low noise amplifier and filter for hydrogen line radio astronomy. Currently the

Great question, Andrew — this is right at the heart of how the Milky Way has been mapped in neutral

Here’s an image of the RTL-SDR Blog V3 dongle for reference. Comparing “RTL2832U SDR” vs “RTL-SDR V3” What’s in a Name? What

Result of combining entire available data set start of data collection up to 17 August 2025, from LRO 1, 2,