Weather-Watch.com

General => Weather in Education => Topic started by: Bashy on June 27, 2016, 05:43:29 AM

Title: Wanna build a Doppler?
Post by: Bashy on June 27, 2016, 05:43:29 AM
Perhaps Micks next project :)

http://ocw.mit.edu/resources/res-ll-003-build-a-small-radar-system-capable-of-sensing-range-doppler-and-synthetic-aperture-radar-imaging-january-iap-2011/

Turns out, all MIT course work is online free....

Radar System design slides: block diagram, schematics, bill of material, and fabrication instructions PDF
http://ocw.mit.edu/resources/res-ll-003-build-a-small-radar-system-capable-of-sensing-range-doppler-and-synthetic-aperture-radar-imaging-january-iap-2011/projects/MITRES_LL_003IAP11_proj_in.pdf
Title: Re: Wanna build a Doppler?
Post by: niko on June 27, 2016, 01:26:37 PM
Very cool Bashy, thanks for posting that  :D Only need to add a kilowatt amp and you would really have something  8O
Title: Re: Wanna build a Doppler?
Post by: GarthBock on June 27, 2016, 01:36:01 PM
...... Only need to add a kilowatt amp.....

Mine won't work....mine puts out 1.21 gigawatts......that reminds me....gotta go through the garbage for fuel for Mister Fusion.... :lol: :lol: :lol:
Title: Re: Wanna build a Doppler?
Post by: Weather Display on June 27, 2016, 06:50:37 PM
did they test this one for local rain ? (1 KM radius)...would be good to know for when it bring in washing, lol
could be good for tornado chasing too (but you would need to be close), to pick up the different wind directions
Title: Re: Wanna build a Doppler?
Post by: MichaelPT on July 03, 2016, 10:05:45 PM
Perhaps Micks next project :)

http://ocw.mit.edu/resources/res-ll-003-build-a-small-radar-system-capable-of-sensing-range-doppler-and-synthetic-aperture-radar-imaging-january-iap-2011/

Turns out, all MIT course work is online free....

Radar System design slides: block diagram, schematics, bill of material, and fabrication instructions PDF
http://ocw.mit.edu/resources/res-ll-003-build-a-small-radar-system-capable-of-sensing-range-doppler-and-synthetic-aperture-radar-imaging-january-iap-2011/projects/MITRES_LL_003IAP11_proj_in.pdf


Very interested playing around with something like this the amount of stuff you can learn from a project like this

I would like to build one just for the fun
Mick
Title: Re: Wanna build a Doppler?
Post by: looney2ns on August 29, 2016, 04:54:29 PM
This is so cool! What would the DIY world do without metal coffee cans.  :wink:
Title: Re: Wanna build a Doppler?
Post by: Dale Reid on August 30, 2016, 01:33:04 AM
How did they get a license to emit radiation for that thing?  Here in the US you'd need a license from the Federal Communications Commission to power it up if it were radiating at over a few deciwatts.
Title: Re: Wanna build a Doppler?
Post by: niko on August 30, 2016, 01:42:59 AM
Low power in a license free band  :wink:

"Operates in ISM band of 2.4 GHz, approximately 10 mW TX power"
Title: Re: Wanna build a Doppler?
Post by: Dale Reid on August 30, 2016, 12:33:56 PM
I gotcha.  After finding the links to the lectures I found more info.

I was reading earlier in the thread and some comments about looking at rain out to a km or so were made.

Also this isn't doppler per se but a SAR unit, from what I can glean.  You have to move it linearly and let the algorithm (not well discussed) do the work.

Cool idea, though.

I do have an old aircraft radar that was working when the guy replaced it in his plane from years ago  However the wiring harness was sacrificed and to put the effort into getting it up and running now seems beyond my abilities, although when I bought it I thought it would be a snap, just wire up a  bunch of those round Army connectors and bolt the waveguide on and voila!  I'm sure I'd have a hard time getting a license for that baby, too.