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Tangential velocity measurement using interferometric MTI radar

Patent ·
OSTI ID:1175607
; ;

Radar systems use time delay measurements between a transmitted signal and its echo to calculate range to a target. Ranges that change with time cause a Doppler offset in phase and frequency of the echo. Consequently, the closing velocity between target and radar can be measured by measuring the Doppler offset of the echo. The closing velocity is also known as radial velocity, or line-of-sight velocity. Doppler frequency is measured in a pulse-Doppler radar as a linear phase shift over a set of radar pulses during some Coherent Processing Interval (CPI). An Interferometric Moving Target Indicator (MTI) radar can be used to measure the tangential velocity component of a moving target. Multiple baselines, along with the conventional radial velocity measurement, allow estimating the true 3-D velocity of a target.

Research Organization:
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation
Patent Number(s):
6,982,668
Application Number:
10/675,328
OSTI ID:
1175607
Country of Publication:
United States
Language:
English

References (2)

Clutter effects on ground moving target velocity estimation with SAR along-track interferometry conference May 2004
Moving target performance for RADARSAT-2
  • Thompson, A. A.; Livingstone, C. E.
  • IGARSS 2000. IEEE 2000 International Geoscience and Remote Sensing Symposium. Taking the Pulse of the Planet: The Role of Remote Sensing in Managing the Environment. Proceedings (Cat. No.00CH37120) https://doi.org/10.1109/IGARSS.2000.859653
conference January 2000

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