GAN/TSI/M1 - Water on lens

After a rain episode, drops of water collected on the lens window causing the cloud 
fraction values to be suspect.

To prevent this, a drip edge was formed around the bottom of the enclosure with thick 
electrical or splicing tape.

• percent_thin
• count_sky
• region_zenith_count
• region_zenith_count_opaque
• count_thin
• region_zenith_count_thin
• percent_opaque
• count_opaque