Accession Number : ADA319229

Title :   Potential of Advanced Very High Resolution Radiometer (AVHRR) Derived Sea Surface Currents for U.S. Coast Guard Search and Rescue Application.

Descriptive Note : Final rept.,

Corporate Author : COAST GUARD RESEARCH AND DEVELOPMENT CENTER GROTON CT

Personal Author(s) : O'Donnell, J. E. ; Robe, R. Q.

PDF Url : ADA319229

Report Date : APR 1996

Pagination or Media Count : 79

Abstract : The U.S. Coast Guard evaluated the potential of AVHRR for estimating the near real-time surface velocity field for oceanic searches. By comparing sequential AVHRR images, the movement of sea surface temperature features can be detected from which the surface currents are inferred. Two methods are available for estimating surface currents from satellite imagery: feature tracking and inversion of the heat equation. The two techniques were evaluated to determine which method was best suited to fulfill the unique operational requirements of the U.S. Coast Guard Search and Rescue program. Implementation of these methods for operational search planning involves different requirements than for pure research. To address these issues, AVHRR derived surface currents were compared with drifting buoy measurements. It is anticipated that AVHRR imagery will be used in conjunction with imagery from other satellite sensors as the technology and data become available. In addition to providing near real-time velocity fields, the data contained in AVHRR images are useful to search and rescue operations by providing positions of thermal fronts and ocean eddies.

Descriptors :   *OCEAN CURRENTS, *METEOROLOGICAL SATELLITES, *RADIOMETERS, *SEARCH AND RESCUE, IMAGE PROCESSING, MILITARY REQUIREMENTS, OCEAN SURFACE, REAL TIME, EDDIES(FLUID MECHANICS), HIGH RESOLUTION, OCEANOGRAPHIC DATA, GEODETIC SATELLITES, SEA RESCUES, SEA STATES, MARINE METEOROLOGY, BOAT AND SHIP SAFETY, FRONTS(OCEANOGRAPHY), COAST GUARD OPERATIONS, COAST GUARD RESEARCH, PUBLIC SAFETY, BUOYS, MARINE GEOPHYSICS, SEA TESTING, SATELLITE PHOTOGRAPHY, SATELLITE TRACKING SYSTEMS, FRONTS(METEOROLOGY), SCIENTIFIC SATELLITES, SEA RESCUE EQUIPMENT, LIFE SAVING.

Subject Categories : Physical and Dynamic Oceanography
      Escape, Rescue and Survival
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE