Geometric Rectification of High Resolution Airborne Multispectral Data

Abstract

NOARL is developing techniques to map water depths in clear, shallow waters from multispectral imagery. The airborne multispectral system consists of a suite of sensors including the NOARL multispectral scanner, hydrographic airborne laser sounder, Litton 72 Inertial Navigation System, Rockwell Collins Global Positioning System, and a radar altimeter on board a Navy P-3 aircraft. Using an airborne multispectral scanner as an bathymetry sensor requires an accurate geometric registration of measured depth points to image pixels. The absolute depth is derived from a source external to the multispectral sensor (i. e., laser sounder or ship derived depths). In order to accurately model the correlation between the depth and multispectral reflectance these depths must be mapped precisely to the multispectral imagery. Following the mapping procedure, regression techniques are employed to compute a depth for each pixel. Once depths are computed for the entire image, accurate positioning is required for merging independent flightlines to produce accurate high resolution bathymetric charts.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA230696

Entities

People

  • H. C. Mesick
  • Maria T. Kalcic
  • Stephen C. Lingsch

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Sensors
  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Airborne
  • Aircrafts
  • Altimeters
  • Bathymetry
  • Detectors
  • Global Positioning Systems
  • Grids
  • Ground Stations
  • High Resolution
  • Inertial Navigation
  • Inertial Navigation Systems
  • Navigation
  • Optical Properties
  • Radar Altimeters
  • Remote Sensing
  • Shallow Water

Readers

  • Computer Vision.
  • Oceanography.

Technology Areas

  • Directed Energy
  • Space