@hanscees @jianmin @SrRochardBunson Anything that transmits signals can be fairly easily located using a technique called Direction Finding (DF)
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@hanscees @jianmin @SrRochardBunson Anything that transmits signals can be fairly easily located using a technique called Direction Finding (DF)
There's at least two different ways this can be done:
- "foxhunting" with a directional antenna: a radio operator manually uses a directional antenna and pattern matching software to try and find the location of a signal based on changes in signal strength as the directional antenna is moved around
- TDOA analysis: Time Difference of Arrival is a way of using multiple radios attached to multiple omnidirectional antennas that are spread out from each other in a pattern. TDOA analysis software can determine the direction a signal is coming from based on the the tiny difference in time it takes for each antenna to receive an incoming signal
With both techniques operators can physically move around while following the direction the signal is coming from to eventually arrive at the location the signals origin location.
-
@hanscees @jianmin @SrRochardBunson Anything that transmits signals can be fairly easily located using a technique called Direction Finding (DF)
There's at least two different ways this can be done:
- "foxhunting" with a directional antenna: a radio operator manually uses a directional antenna and pattern matching software to try and find the location of a signal based on changes in signal strength as the directional antenna is moved around
- TDOA analysis: Time Difference of Arrival is a way of using multiple radios attached to multiple omnidirectional antennas that are spread out from each other in a pattern. TDOA analysis software can determine the direction a signal is coming from based on the the tiny difference in time it takes for each antenna to receive an incoming signal
With both techniques operators can physically move around while following the direction the signal is coming from to eventually arrive at the location the signals origin location.
@meph @hanscees @jianmin @SrRochardBunson
Of course, two hunters need not have a synchronized time base, as is required for TDOA, if they can communicate their own bearings to the signal source as well as knowing their bearings to each other and their distance from each other (known angle-side-angle to compute the remaining angle and the length of the two uknown sides).
