Please contact Bruce Kindel (kindel@ucar.edu) before using the nadir spectral irradiance
data acquired during PACDEX. An aircraft vibration problem related to the mounting of the
instrument degraded the stability of the measurements. Some flights are of good quality
(i.e. stable to 1-5%) while others are of rather poor quality (30-40% changes). This pertains
only to the nadir data. The zenith data was stable to 1-2% over the entire experiment.