Radio altimeter design will be used on concorde and new french military aircraft. In conventional systems beat frequency results from comparison between frequency of transmitted and reflected signal. Cycles/sec. In beat frequency is counted and converted into aircraft height.- here, beat frequency is maintained constant by changing duration of frequency sweep. Sweep duration required for fixed beat frequency is proportional to aircraft height above ground.
Altimeter uses constant beat frequency
Aviation Week and Space Technology ; 90 , 23 ; 80-82
1969
3 Seiten, 5 Bilder
Article (Journal)
German
NTIS | 1972
NTRS | 1972