(рлк.) частота (флуктуацій амплітуди) ехо-сигналу
echo location/echo ranging
pulse repetition frequency (PRF) / pulse-repetition frequency
E – ECHO
echo (returned signal)
echo depth finder
echo sounder
echo sounding
bottom echo
bottom echo signal
coherent echo
coherent echo modulation and detection
Doppler echo indicator
echo area
echo intensity
mirror-reflection echo
precipitation echo
second-trip echo
echo
Echo (phonetic alphabet)
target echo
skin echo
common frequency
doppler frequency shift
fixed frequency channel
frequency
frequency and directional chart
frequency band
frequency intelligence
frequency modulated (FM)
frequency modulation (FM)
frequency range (band)
frequency response