Atmospheric and illumination conditions in your fields change every minute of every day. We introduced calibrated imagery to agricultural airborne remote sensing as an industry first with our patented AIS sensor in 2014 because, without a self-calibrating sensor, accurate comparison of past, present, and future data is impossible.
SLANTRANGE systems are designed to compensate for changes in lighting throughout a single flight and from flight-to-flight, so in most conditions the user does not need to worry about lighting. The sensor measures ambient light and adjusts exposure time for each frame based on the measured lighting condition. In bright conditions exposure time is low; in darker (overcast sky) conditions, exposure time in higher, making images more susceptible to motion blur. Fly at slower ground speeds when lighting is poor.
Lower levels of ambient light on cloudy days compared to sunny days are not a problem for the SLANTRANGE sensor, however we recommend flying within 3 hours of solar noon when possible because side illumination and shadows obscuring neighboring plants, particularly in taller row crops, can limit data quality.
Rules of Thumb Collect data within 3 hours of solar noon when possible. Shadows and side illumination of plants can limit results.