Radio observation in hydrogen line (1420MHz)

Latest hydrogen radio map (1420MHz) Milky Way from LRO 20/12/23

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Maps from latest data set 20/12/2023 (plots from ezCon ezGal and ezSky) – galaxy maps and uncorrected rotation curves for Milky Way:

By Admin

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Radio observation in hydrogen line (1420MHz) SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

The gain of a hydrogen horn or dish depends on its aperture which makes sense as bigger aperture means more light collected. But how does this work with a Yagi antenna tuned to hydrogen?

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Radio observation in hydrogen line (1420MHz) SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

It is commonly stated that acceptable error in flare angle on a SETI Horn of Plenty is lambda/4. Why is this amount chosen?

Admin
Radio observation in hydrogen line (1420MHz) SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

Can an existing SETI Horn of Plenty (Hydrogen Line Horn) be extended by adding an extension on the front? Practical answer and more detailed explanation of physics involved.

Admin

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