This page provides near-realtime MCC surface current data for the Gulf of Mexico and southern U.S. east coast. Each day, new currents are computed from the most recent MODIS ocean color imagery. The velocities are progressively processed into 3-day and 7-day composites. The 3-day composite is updated daily, while the 7-day composites and animation are updated every Sunday night. The composite data files contain the location and velocity information corresponding to each composite image. They are text files with 2 header lines and the following 5 columns of data: longitude, latitude, u-velocity (zonal), v-velocity (meridional), correlation coefficient. The first header line is the date/time range of the composite data. The second header line specifies the following 5 parameters: # of x grid points, # of y grid points, image x-size, image y-size, correlation coefficient (arbitrary). Altimetry-derived surface velocities are shown in white on composite images older than 7 days. The date range for each composite is located on top of each image.