.... on how to capture a radar image, I guess you would call
it "slow scan" (that has no outputs) by placing a transmitting
camera in front of the screen and sending live feed to a central
point within a 25 mile range to be viewed. This would be a
mobile/moving radar (like in a car/van/SUV). I would need the
transmitters, receivers, camera's, repeaters, routers or whatever
would be required. Once captured, I would want to not only view it
but convert it to digital to save/record/store/route .....maybe
someone has some ideas?
Here's what I know. I'm working at trying to balance two
variables...bandwidth of the network versus quality of video
passed. For the sake of argument, let's say I have 8 mobile systems
with from one to three CRTs each. Ideally, I need to pass: 1. the
highest quality video (it is probably possible to capture this prior
to the CRT in some way) I can, 2. a data channel with system info
(time stamp, pointing angles, target range, firing command, some
binary switch positions) and 3. a voice channel. I think I have a
handle on the requirements for the last two so I am balancing the
quality of the video channels with the bandwidth of the transmission
media to create a flexible robust mobile network. I know it can be
done. I'm just ignorant of how to do it.
I know there are some bandwidth saving algorithms around...often
times a fairly large part of a video image does not change from
frame to frame. But maybe this doesn't matter. Maybe there is (or
soon will be) enough bandwidth in a "cell phone-like" system that I
don't need to worry about this.
Anyway, I'll link my 8 mobile systems to a remote node, then put
data from the systems on the internet in a secure fashion and send
it back to central location for processing. The processing consists
of taking the time stamped system data (radar pointing angles and
range...a point in space) and comparing it to time stamped lat/long
and altitude from "aircraft of interest" data received through a
separate data channel. The video data gets displayed so that local
experts can analyze what's taking place in the engagement and at the
same time it is also stored for future playback. The voice channel
allows monitoring of radar operator actions and some coordination
among all the mobile systems, although they have an existing channel
for this. The voice channel will also provide a broadcast system
from the remote location for test/training organization.
This is the stressing case. A slightly different one is when the
systems are not mobile and situated on fixed concrete pads within a
few hundred meters of each other. For that case, I just run fiber
and I can get all the bandwidth I want.
Thanks for the help,I look forward to your reply's
David Rogers, KD4KOB
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