An Introduction to Direction Finding 

I am writing from 2024 from Ukraine from the war. Here we have to detect enemy (russian) quadrocopters - all knowledge from your webinar is extremely useful! Thank you!

I am using extensively your videos in order to prepare my airline pilot licence, the quality is really good, vielen dank!

Excellent overview of the subject. Best I have seen to date. 👍

Great content. We use this DF system daily! Thank you, R&S.

For the manual direction finding, the antenna can be mounted on a rotating platform and the signal measured so fast with the orientation of the antenna tagged to each measurement. The highest strength can be extracted by observation or by simple code.

Great presentation on the subject-matter! Could you answer which methods modern mobile phone uses for finding inter-device directions within proximity of couple of centimeters?

Thank you so much You explained a topic which had been taught me with missing concepts..

The Abhwer were specialists at this. Plenty of SOE agents were found by RDF. Cheers VK4SOE.

Insanely good information in this video, wow.

Amazing!!! Excellent summary about the DF's principles, pretty needed!

Very informative on the concept of Where Am I ; )

very nice! Thank you

interesting video ! can it be used to achieve the accuracy of 1cm or even less using Bluetooth LE direction-finding concepts?What challenge you see?

Thanks for the well presented video; very concise and yet insightful.

An excellent presentation, thank you very much R&S

lovely sound & webinar!

Sir ,What is formula for direction of arrival

In this lesson, maps were displayed. Can I know what program is used to display these maps?

Can Bluetooth LE work in Non-LOS conditions (such as under rubble, filled with dust, stone, etc.).

Amazing

Two questions: 1. Why is Wattson-Watt better for HF (low frequency) than Doppler? I understand antennas have to be larger for lower frequencies, which for a scenario that involves physically moving the antenna with Doppler would make it more difficult, but that wouldn't seem to be in play for electronically switched Doppler. Is it because the magnitude of the frequency difference of the Doppler effect is dependent upon the wavelength of the signal, and lower frequencies have a smaller magnitude frequency shift due to Doppler effect and thus it's harder to resolve the frequency shift due to Doppler at lower frequencies? 2. Not understanding how an omnidirectional antenna helps resolve 180 degree directional ambiguity with Wattson-Watt. An omnidirectional antenna has a theoretically equal gain in all directions, correct? Then how can it resolve one direction from another? How would an antenna that sees all directions equally be able to differentiate a signal coming from the north from a signal coming from the south?

I don't believe hyperbolae intersect because the sharpest curvature occurs in a direct line between the focii. For example if only R1 and R2 are considered, the 'points' in the hyperbolae curves (and they come in pairs!) will 'point' at the R1 and R2 stations. i.e These two curves are closest in the direct line between R1 and R2. The example shown seems to confuse range rings except uses hyperbolae instead of circles.

Non static source, multiple sources, near field, etc.

can u plzz upload your slides and documents for more help?

what is the symbol inside the C(a) at time stamp 23:58? the x axis is the symbol and y is C(symbol). I must be brain farting on it.

it was a very informative video.i have some questions regarding TDOA if u could plzz answer.

Mid

you need to clarify the content

you need to clarify the content