Cosine effect will show slower velocity and there is a math formula to calculate the amount of error. The higher the frequency generally the narrower the size of the beam. This change in band from X Band to K and Ka band was noticeable in the usage of traffic radar. Seeing how the Garmin uses such a high frequency having the beam parallel with the bullet flight path will provide the most accurate data.
Doppler RADAR determines speed from the shift in frequency of the signal from the transmitted signal to the reflected received signal. I would think the Garmin design would account for other RF signal in close proximity to the Garmin and be able to differentiate it’s own transmitted and received signal. In land mobile radio communication the transmitted digital or analog signal use a code to access systems. With digital systems like P25 a NAC code is used to gain access to a network, similar to an IM number with cell service or Identify Friend or Foe (IFF) in the military.
Doppler RADAR determines speed from the shift in frequency of the signal from the transmitted signal to the reflected received signal. I would think the Garmin design would account for other RF signal in close proximity to the Garmin and be able to differentiate it’s own transmitted and received signal. In land mobile radio communication the transmitted digital or analog signal use a code to access systems. With digital systems like P25 a NAC code is used to gain access to a network, similar to an IM number with cell service or Identify Friend or Foe (IFF) in the military.
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