Feds: There are hostile stingrays in DC, but we don’t know how to find them

Re:Feds: There are hostile stingrays in DC, but we don’t kno... by sounds on Wednesday April 04, 2018 @12:35PM (#16756359)

Phased arrays of antennas can compute the incoming direction of a signal entirely through signal processing and do not require a motorized platform.

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Re:Feds: There are hostile stingrays in DC, but we don’t kno... by walrus01 on Thursday April 05, 2018 @02:59AM (#16762505)

purely Rx phased arrays, unless very large, do not have nearly the gain (in dBi) of a good parabolic or horn. and not nearly as much directional discrimination as a good sized (90cm) parabolic.

in a phased array that is also a Tx this can be partially compensated for with higher dBm output power from the radio itself, but that's not the usage scenario we're talking about here.

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Re:Feds: There are hostile stingrays in DC, but we don’t kno... by toomuchtodo on Wednesday April 04, 2018 @02:35PM (#16757579)

Can LTE carrier networks not act as an enormous observation system for unauthorized IMEI catchers?

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