Spectral measurements of the equilibrium radiation from nitrogen at high pressures have been obtained. Experiments were performed in a ballistic range and an explosively driven shock tube. The tests covered a temperature range from 9000 to 17,200°K and a pressure range from 1.3 to 63.0 atm. Averaged electronic absorption ƒ-numbers for N + 2 B 2∑ + u - x 2∑ + g , N 2 C 3∏ u - B 3∏ g , and N 2 B 3∏ g - A 3∑ + u bands are reported. N - continuum radiation was not observed.