Accession Number:

ADA303153

Title:

Composite Shiptrack Characteristics.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1995-06-01

Pagination or Media Count:

88.0

Abstract:

Shiptracks 131 identified from Advanced Very High Resolution Radiometer AVHRR satellite images during the Monterey Area Ship track Experiment MAST are extracted and correlated with the ships that caused them. Composite plots and statistics of shiptrack environmental, radiative and physical properties are presented. The composite shiptrack is 296 km long, approximately 7.3 hours old, and averages 9 km wide. The head of the track has a separation distance from the ship of 16 km, and a separation timeST of 25 minutes. It forms in a ambient environment with a true wind of 15 kts and a low cloud reflectance in channel 3 low 3 of 11. The composite shiptrack has a low 3 equal to 14 and average Delta Percent Change channel 1 and 3 values of 7 and 37 respectively. Approximately 85 of the variability or noise in shiptracks radiative signature is environmentally generated and occurs on the large eddy scale 1-25km. The data set was broken into subsets to isolate the effect of ship parameters on shiptrack characteristics. Variations in ship propulsion type steam turbine verses diesel and designed shaft power rating kW size produce shiptracks that are statistically different in length, width, age and reflectance. The dispersion characteristics of shiptracks were favorably compared to standard, long range dispersion relationships.

Subject Categories:

  • Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE