Kipp & Zonen BREWER MK IV Instruction Manual page 49

ZSSUM NO Zenith Sky Summary
2
ZSSUM prints out a calculation of the stratospheric and tropospheric amounts of NO in m-
2
atmosphere-cm (Dobson Units) for morning and evening twilight periods if measurement
data is available between Zenith Angles 84.5 and 96.5 degrees.
46 MKIV OPERATOR'S MANUAL