Method for interferometric radar measurement
AssigneeEADS Deutschland GmbH
InventorsAribert P. Wolframm, Helmut Klausing
Life of this patent
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Abstract
It is proposed in connection with a method for the interferometric radar measurement in conjunction with a helicopter operating in accordance with the ROSAR principle (Heli-Radar) that two coherent receiving antennas with receiving channels are associated with a transmitter of the ROSAR-system mounted on the revolving rotary cross; and that the difference (ΔR) between the two distances (R+ΔR, R) from the measured impact point P are calculated, in the manner known per se, based on the wavelength λ of the emitted radar signal and the measured phase difference of the receiving echo of the two coherent receive channels.
Claims6
An arrangement for interferometric radar measurement comprising:
- a transmitter disposed on a turnstile of a ROSAR system of a helicopter radar;
- at least two assigned coherent receiving antennas having receiving channels disposed on said turnstile of said ROSAR system of a helicopter radar;
- and
- an additional transmitting/receiving antenna disposed on said turnstile wherein said additional transmitting/receiving antenna has a narrow beam and is focused downward in elevation covering a lower range of a sight angle to determine a distance to an impact point on a surface and for further clarification of a received signal by said at least two assigned coherent receiving antennas.
A process for interferometric radar measurement comprising the steps of:
- assigning two coherent receiving antennas having receiving channels to a transmitter;
- calculating a path length difference of two distances to a measured receiving point from a wave length of a transmitted radar signal and of a measured phase difference of a reception echo of both coherent receiving channels;
- assigning said two coherent receiving antennas to a transmitter of a ROSAR system;
- arranging said two coherent receiving antennas and said transmitter on a rotating turnstile of a radar;
- and
- evaluating signals of an additional transmitting/receiving antenna that has a narrow beam and is for determination of said phase difference of said reception echo of both coherent receiving channels;
- wherein a helicopter operating according to the ROSAR principle is used for the interferometric radar measurement.
Dependencies are inferred from the claim text.