Arrangement for the interferometric radar measurement according to the rosar principle

• US 6,549,159 B1
• Filed: 07/20/2001
• Issued: 04/15/2003
• Est. Priority Date: 01/21/1999
• Status: Expired due to Fees

• Current Assignee: EADS Deutschland GmbH (Airbus SE)
• Original Assignee: Astrium GmbH (Airbus SE)
• Inventors: Klausing, Helmut, Wolframm, Aribert P.
• Primary Examiner(s): Buczinski, Stephen C.
• Application Number:
  US09/889,758
• Time in Patent Office: 634 Days
• Field of Search: 342/25, 342/158, 342/145
• US Class Current: 342/25.00R
• CPC Class Codes: G01S 13/9082 Rotating SAR [ROSAR]
• CPC Class Codes: G01S 13/9092 combined with monopulse techniques

Abstract

In conjunction with an arrangement for the interferometric radar measurement in connection with a radar system operating according to the ROSAR principle, comprising one coherent transmitting antenna and two coherent receiving antennas and their receiving channels, in connection with which the difference in the path between the two distances of the antennas and the measured points of impact is calculated by the wavelength λ of the emitted radar signal and the measured phase difference of the receiving echo of the two coherent receiving channels, it is proposed that the interferometric ROSAR system is integrated in or on a rotating device and positioned in such a way that each relevant area of the field to be measured can be detected.

Claims

1. An arrangement for interferometric radar measurement having a plurality of ROSAR systems linked together, each ROSAR system comprising:

at least one coherent transmitting antenna for emitting a radar signal;

at least two coherent receiving antennas that receive a radar signal;

at least two receiving channels, one disposed on each receiving antenna; and

a rotating device having a rotating arm upon which said at least one coherent transmitting antenna and said at least two coherent receiving antennas are integrated;

wherein a difference in radar signal path distance between said at least two coherent receiving antennas and measured points of impact is calculated using a wavelength λ

of said emitted radar signal and a measured phase of a receiving echo of said two coherent receiving channels; and

wherein the arrangement is embodied as an interferometric ROSAR system, and positioned in such a way that each relevant area of the field to be measured can be detected, wherein for obtaining an image of the overall situation, ROSAR systems form a data network when linked together.

2. The arrangement according to claim 1, further comprising at least one unit disposed on an end of said rotating arm and formed by one transmitting antenna and two receiving antennas.

3. The arrangement according to claim 1, wherein said rotating device comprises a circular array of antennas with an electronic control for the cyclic activation of areas of said array of antennas.

4. The arrangement according to claim 1, further comprising a second rotor arm having an identical configuration as said rotating arm in terms of radar, and connected to the rotating radar arm as a counterweight.

5. The arrangement according to claim 1, wherein said at least one transmitting antenna and said at least two receiving antennas are protected by aerodynamically favorably shaped radomes.

6. The arrangement according to claim 1, wherein transmitting frequencies of individual interferometric radar installations are offset in relation to each other by respective transmission bandwidths.

7. The arrangement according to claim 1, wherein the interferometric arrangement for radar measurement is linked with a radar arrangement for detecting moving targets.

8. The arrangement according to claim 1, further comprising an evaluation device for detecting the direction and path of objects moving in a monitored area.

9. The arrangement according to claim 1, further comprising an evaluation device for determining size and type of objects detected.