robotastic

Joined 10 years ago

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228

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Nov 1

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Show HN: Web App Uses RTL-SDR to Align HDTV Antenna tunerscope.com

27 robotastic 3 months ago 5 comments

Comment · 3 years ago

This podcast is generated by community on OpenMHz.com curating interesting radio transmissions.

Creating a Podcast from Public Safety radio transmissions lukeberndt.com

1 robotastic 3 years ago 1 comments

Use Azure Services from GNU Radio Flowgraphs github.com

2 robotastic 4 years ago 0 comments

Learn how to use GNU Radio on Azure github.com

1 robotastic 4 years ago 0 comments

Google Coral Micro will be the size of a Pi Zero coral.ai

2 robotastic 4 years ago 0 comments

Comment · 4 years ago

ha! yea.... The camera itself doesn't know when a building gets in the way. I have some general stop angles, but it is not perfect. There is some ML in there to get rid of photos like this... but I guess the model things that air conditioners look like airplanes.

Comment · 4 years ago

In theory it should work with any camera the supports ONVIF, which is a standard for security cameras... actually, as long as the camera has an API you could probably get it to work. Since precision and image quality are important though, it could end up being more trouble that it is worth. You may have better luck trying to find a used one.

Comment · 4 years ago

That is interesting! There is this cool piece of software that looked like it helped with a lot of this. It did visual object tracking with telescopes... but it is no longer available: http://www.optictracker.com/What_is_it.html

Alignment has been a big pain for me. I might actually have to look at how to use stars to correctly position everything.

Comment · 4 years ago

I am not sure if it is actually useful... but if folks have ideas, I would love to hear them! I worked on it mostly to see if it could be done.

Comment · 4 years ago

Totally - I think you could work back where the camera is based. I have the bearing / azimuth of the camera for each photo, so you could look up where each plane was at that timestamp and then project backwards.

I bet you had much better aircraft flying out of Hong Kong!!

Comment · 4 years ago

It should work for helicopters. In DC, alot of them do not have ADS-B and the flight paths are a little different, so I haven't managed to capture one yet though.

Comment · 4 years ago

That would be awesome! How fast can those mounts move? Would they be able to follow an aircraft? I have found that more zoom actually makes things a little tricker because you have to make sure it is leveled and aligned precisely. When my camera is fully zoomed, it has about 1 degree vertical field of view.

Comment · 4 years ago

Thats amazing! If I lived anywhere near the water I would want to try and set something like this up.

Comment · 4 years ago

I posted a bit more on what I am using on the About page: http://skybot.cam/about

I got all the camera gear on ebay, which was lucky.

I figure since it is all based on ADS-B data, there isn't anything too crazy about making it public. I am also still trying to figure out if it is actually useful for anything... besides getting unlimited plane photos!