Accession Number : ADA118160

Title :   Collinear-Track Altimetry in the Gulf of Mexico from SEASAT: Measurements, Models and Surface Truth.

Descriptive Note : Final rept.,


Personal Author(s) : Thompson,J Dana ; Born,George H ; Maul,George A

PDF Url : ADA118160

Report Date : Jun 1982

Pagination or Media Count : 36

Abstract : From 17 September to 10 October 1978 SEASAT made collinear passes over the Gulf of Mexico. Altimeter data for eight, three-day repeat passes over the eastern Gulf were examined using an arc-segment fitting technique to determine the mesoscale temporal variability of the sea surface. The pattern of sea height variability was then compared with sea height data generated by a numerical model of the Gulf (Hurlburt and Thompson, 1980) from the simulation of a complete cycle of Loop Current intrusion and shedding of an anticyclonic eddy. The model data was found to match that from the SEASAT altimeter when an anticyclonic eddy separated from the Loop Current and the Loop began to repenetrate into the eastern Gulf. Analysis of sparse ground truth data from ship-of-opportunity XBT's, satellite infrared imagery of the Loop Current boundary, and synthetic aperture radar (SAR) imagery, also from SEASAT, tend to confirm the circulation patterns deduced from the altimeter data and the numerical model. (Author)

Descriptors :   *Altimeters, *Ocean currents, *Oceanographic data, *Eddy currents, *Ocean surface, Synthetic aperture radar, Infrared images, Circulation, Anticyclones, Mexico Gulf, Surface truth, Linearity, Patterns, Models, Numerical analysis, Radar, Gulfs, Mathematical models, Simulators

Subject Categories : Air Navigation and Guidance
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE