A grid of six automatic weather stations was installed around the summit of Greenland in 1987. The data are instantaneous observations at ten-minute intervals. The data have been taken directly from the originally transmitted hexadecimal data with only gross error checking during the processing. There will still be bad data points that are within the observable range for the station but are not acceptable compared to the surrounding data points.

The data are organized as follows: each file has a two-line header, followed by data in eight columns. The columns are: julian day, ten minute interval marker, temperature, pressure, wind speed, wind direction, humidity and vertical temperature difference. The temperature difference is the top measurement minus the bottom measurement. The ten minute interval marker is a number between 1 and 144 representing time; 1 is 00:00, 2 is 00:10, 3 is 00:20, 7 is 01:00, and 144 is 23:50.

All times listed are UTC and missing data are indicated as 444.0. Wind directions listed are the direction the wind is blowing from, from 0 to 360 clockwise (thus 90 degrees is east, 180 is south and 270 is west). The data is in the following units: temperatures in degrees Celsius, station pressure in millibars, wind speed in meters per second, wind direction in meteorological degrees, and relative humidity in percent.