In situ measurements of NO, NO2, O3, HO2, ClO, pressure, and temperature have been made at high solar zenith angles (SZA, 70¿--93¿) in the lower stratosphere. These measurements are used to derive the photolysis rate of NO2, JNO2, using a time-dependent method. The resultant JNO2 values and the results of a multiple-scattering actinic flux model show a linear relationship throughout the SZA range. The difference of the two sets of JNO2 values of about 11% suggests that the model scattering calculation is very accurate at high SZA conditions near sunrise and sunset. ¿ 2001 American Geophysical Union