A Lambert Glacier - Amery Ice Shelf - Southern Prince Charles Mountains (SPCM) series of airborne (Pilatus Porter fixed wing) RES profiles were conducted over three summer seasons; 1971/72, 1972/73 and 1973/74. The ANARE Mk 2 100 MHz digital ice radar recorded ice thicknesses continuously along extensive flight paths operating out of a summer base camp at Mt. Cresswell (72.75 S, 64.42 E).
More information can be found at the BEDMAP website.
The fields in this dataset are:
Mission ID Latitude Longitude Ice Thickness Surface Elevation Water Column Thickness Bed Elevation
Gaps in the data (approximately 30-40% dropout) arose from loss of signal return in areas of extremely deep ice and/or internal reflections from complex structures within the ice. The ANARE Mk 2 100 MHz ice radar produced peak power of 3 kW with a pulse duration of 250 ns and repetition rate of 10 kHz. A linear amplifier stage with manual gain control was incorporated into the system. Fixed wing ... (Pilatus Porter) antenna array consisted of separate transmit and receive yagi (1 driven element, 1 director, aircraft wing as reflector). Typical flight speeds were 180 km/hr (100 knot). Typical flight altitudes were 150 m above the terrain surface. Data was recorded continuously on 35 mm black and white film, later scaled by hand approximately every 1 km along flight path. Delay times were reduced to ice thicknesses assuming a signal propagation speed of 169 m/microsecond with no firn correction. The data have been checked internally by repeat measurement (crossover) along several intersecting flight paths. Dead-reckoning with reference to visual landmarks (generally mountains); accurate to within several kilometres, but could be as large as 10 km at long distances from landmarks due to unknown wind induced speed and course errors.
An entry of -9999 in the spreadsheet indicates null data.
Raw data were recorded on 35 mm black and white film and has been scaled into spreadsheet format (MS Excel) approximately every 1 km along track. Spreadsheet (MS Excel) geocoded files.