Title: Terrain-aided position determination using range angle radar altimetry

Abstract

Various embodiments described herein provide for a terrain-aided location determination using a range/angle radar altimetry. Range/angle radar systems use vertical synthetic aperture radar measurements which do not include any cross-track resolution, such that if a range/Doppler cloud from a single VSAR image is compared to a regular DEM, there can be ambiguity in determining the cross-track position. By modifying the DEM to inherently include additional terrain signature information that could be compared to VSAR measurement, the limitation can be overcome, and a single range/angle radar system can provide an accurate position without the additional complexity of a range/angle/angle radar system.

Inventors:

Sloan, George R.; Haydon, Tucker Caelan Ellis

Issue Date:

2023-10-10

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:

2293701

Patent Number(s):

11782154

Application Number:

17/515,720

Assignee:

National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)

Patent Classifications (CPCs):

G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING

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G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING

G01S13/4454 - {phase comparisons monopulse, i.e. comparing the echo signals received by an interferometric antenna arrangement}
G01S13/582 - {adapted for simultaneous range and velocity measurements}
G01S13/882 - {for altimeters
G01S13/90 - using synthetic aperture techniques {, e.g. synthetic aperture radar [SAR] techniques}
G01S13/933 - of aircraft or spacecraft
G01S13/935 - for terrain-avoidance

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DOE Contract Number:  

NA0003525

Resource Type:

Patent

Resource Relation:

Patent File Date: 11/01/2021

Country of Publication:

United States

Language:

English