The Milky Way at 1420Mhz

[AussieSky]

The Milky Way at 1420Mhz from 150 k's west of Sydney


http://www.aussiesky.net/pix/MilkyWay11Mar20.jpg

[multiweb]

That's pretty cool. :thumbsup: Can you explain what we're looking at?

[bojan]

It would be good if you mention the equipment used (antenna, receiver/recorder parameters) and measuring method...

[AussieSky]

It's a waterfall plot of an all sky scan of The Milky Way at 1420Mhz using the following equipment and software. Just finished yesterday, took several weeks running 24/7
see http://www.gco.org.au/SRTInfo/srt.html

[hamishbarker]

Great work.

How do you manage gain variation of the LNA and receiver with diurnal temperature swings?

[AussieSky]

I put the SRT to a fixed position looking into the sky, and let it stay there for a couple of days to look for variations of the receiver level with time to see if there is a variation with ambient temperature. Since then I have not seen a clear relation of the signal to daily temperature rise/fall, I suspect that I might not find any, but I'd like to be sure, so will do some further investigation. I'll get back to you when I have any further data.

[AussieSky]

I have some further data regarding gain variation of the LNA and receiver with diurnal temperature swings. See attached PDF file.