The National Snow and Ice Data Center (NSIDC) has released online ice thickness and surface elevation data for the Ross Ice Sheet of Western Antarctica. This data is a result of the Corridor aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ) experiments of the 1990s. According to NSDIC, "the CASERTZ geophysical surveys were aimed at understanding geological controls on ice streams of the West Antarctic Ice Sheet, ultimately to help assess the potential for ice sheet collapse." Tables listing season/flight, date, latitude and longitude, and thickness (m) are displayed in ASCII text format and are also downloadable via FTP.