METHOD OF MEASUREMENT OF THE HEIGHT AND WITH CONTINUOUS radio altimeter chirp signals using METHOD

摘要

1. A method of radar altimetry includes radiation in the direction of the earth's surface with the fixed probe signal modulation parameters on reception of the reflected signals N repetition periods, filtering the reflected signal with a coherent modulation probing signal filter, to obtain in each repetition period of the envelope of the amplitude of the reflected signalas sampling step resolution corresponding probing signal ,, characterized in that after receipt of the reflected signal amplitude envelope is made of -determination evaluation aircraft altitude ndue each of N realizations spectrum in sequence: formation of a multidimensional gipotezyo height n, the level of noise variance parameter m, determines the dependence of the backscattering diagram of the angular position resolvable surface of the element, calculating the received signal power P (n, k) at a range of k corresponding hypothesis calculation functional sootvetstviyaogibayuschey amplitudyprinyatogo signal gipotezeo height n, the estimated noise variance spectrum envelope power signal P, brute hypothesis of finding of the maximum amplitude of the functional sootvetstviyaogibayuschey received signal the most likely hypothesis, respectively, the height n, repeated measurement ndue N repetition periods are averaged estimate ndue N measurements, respectively obtained vysoty.2 final evaluation. Method radar altitude measurement according to claim 1, characterized in that the envelope of the received signal power P (n, k) is calculated as the product of four factors: the first factor is equal to the product of the number π on the average power of the probing signal and the square of the wavelength