NSA/TSI/C1 - 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.

• Pixel count: number total thin(count.thin)
• Pixel count: number thin in zenith circle(region.zenith.count.thin)
• Percent opaque cloud(percent.opaque)
• Pixel count: number total opaque(count.opaque)
• Pixel count: number opaque in zenith circle(region.zenith.count.opaque)
• Percentage thin cloud(percent.thin)
• Pixel count: number total in zenith circle(region.zenith.count)
• Pixel count: number total in processed circle(count.sky)