Dutch radio amateurs image far side of the Moon using Chinese satellite data
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Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#2> The transceiver on board Longjiang-2 was designed to allow radio amateurs to downlink telemetry and relay messages through a satellite in lunar orbit, as well as command it to take and downlink images.
This is so cool and would have made such an impact on me as a kid if I got to see it in action. I wish we could better demonstrate this sort of thing in middle school or high school science classes, such as how easy it is to download a weather satellite image live, via SDR.
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#3How do pixels work in radio astronomy? Does the antenna only capture one pixel every time the "shutter" is opened and then move to the next position?
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#4How do pixels work in radio astronomy? Does the antenna only capture one pixel every time the "shutter" is opened and then move to the next position?
This is a normal camera, a normal radio that transmits it, and a large radio telescope (once, over half a century ago, the largest in the world, but now amateur operated; https://en.m.wikipedia.org/wiki/Dwingeloo_Radio_Observatory) used as an antenna to receive that broadcast.
I expect the data to be transferred one pixel at a time, but possibly, it’s losslessly compressed.
It’s “Dutch radio amateurs image” because they controlled the camera.
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#5> designed by radio amateur and Nobel prize winning astrophysicist Joe Taylor
He doesn't sound like an amateur at all
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#6> designed by radio amateur and Nobel prize winning astrophysicist Joe Taylor He doesn't sound like an amateur at all
I am not a native speaker, but it is my understanding that amateur has 2 definitions: 1) unpaid, 2) incompetent or inept.
The Camras team is maintaining and operating the telescope on their own time. The members have dayjobs like programmers and scientists, or are retired professionals. So I'll go with the first definition.
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#7> designed by radio amateur and Nobel prize winning astrophysicist Joe Taylor He doesn't sound like an amateur at all
Not sure if this was a joke or serious, but 'amateur radio' refers basically to people who are into HAM radio. It doesn't necessarily preclude them from also working with radio professionally.
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#8> designed by radio amateur and Nobel prize winning astrophysicist Joe Taylor He doesn't sound like an amateur at all
Doesn't sound very Dutch either ...
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#9> designed by radio amateur and Nobel prize winning astrophysicist Joe Taylor He doesn't sound like an amateur at all
> radio amateur
I don't know if it's a British joke, but recall that "amateur" in "amateur radio" means "a duly authorised person interested in radioelectric practice with a purely personal aim and without pecuniary interest " (International Radiotelegraph Convention of Washington, 1927), i.e. anyone working with radio for the hobby, not for the job salary.
Re: Dutch radio amateurs image far side of the Moon using Chinese satellite data
#10What causes the pink hue in the original photos?
http://lilacsat.hit.edu.cn/DSLWP-B/865fbeb5-116d-4f6a-bb86-0...
