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I would like to get in on this, but from a blind persons perspective. I know the H1 line is far wider than what the human ear can hear, but my ears can probably pick up something in a sound scape that might not be noticed by someone watching a waterfall. It's a differing technique to sight. believe me, I find this field of study highly interesting.
btw, as a teen (and fully sighted back then), I had a Tasco Brand 1500mm Cassengrain telescope and I spent a lot of nights in the back yard looking at some of the more interesting objects in the night sky. I really do miss that and would certainly want to enjoy it again, if only by touch and sound.
DE n7zzt Eric
On Dec 19, 2017, at 2:17 PM, David Eckhardt wrote:
Thank you, Robert for all the invaluable information!
I belong to several technical google,io groups other than AirSpy. They have all migrated from the older yahoo groups which are going away, if they haven't already, to the google forums. Yes, we have SARA and a few other dispersed resources online and in books and publications, but possibly we might (suggestion) start a moderated google.io
group specific to ARA. RadioJove really sticks to 20.1 MHz, although many spectra are published on that forum which cover above and below 20 MHz with nothing said (myself included). I have learned an awful lot from the other groups, non ARA, to which I belong. I'd propose just beginning to think of the possibility of starting a moderated ARA-only google,io group. There is SO MUCH to be discovered using an SDR re solar and Jupiter emissions than just a single-frequency receiver like the RJ receiver. I started with the Icom R-7000, but once I purchased my first 8-bit USB dongle, I was hooked on the SDR technology. I've so far been through two AirSpys one damaged by ESD (USB) and the other by a close-by lightning strike (front end). I have a third and love it!
Example: We recently 'fine tuned' our H1 receiver system and dish feed at LTO in Berthoud, Colorado. We have a 14' off-center fed dish. I was amazed to actually SEE the H1 line painted down the waterfall of SDR# from one of the Galactic arms. A single-frequency receiver in no way can visualize the roughly 260 kHz bandwidth of the thermally spread line centered on 1420.405751 MHz! But, we really need more bandwidth for radially Doppler shifted deep space objects other than the Galactic arm.
Again, thank you for the references. I need time to digest the list, but I really do believe we should pull everything together in an ARA-only group.
Dave Eckhardt - WØLEV
Volunteer: Little Thompson Observatory (LTO)