NIM/TSI/M1 - Reprocess: Data processing problem

Due to the high aerosol conditions at Niamey, the TSI appeared to be beyond the limits of 
processing the color JPEG image into cloud fraction values. Several attempts to adjust 
the sky filter values used to process the images did not yielded the desired results. The 
processed images indicate an opaque sky cover, even in the absence of clouds.

The problem was corrected by removing the neutral density filter from the lens and 
re-adjusting the sky filter values.

The data can be reprocessed.

• Cloud decision images, Total Sky Imager, PNG format(png)

• count.opaque
• region.sun.count.opaque
• region.horizon.count.thin
• Sunshine Meter(sunny)
• region.zenith.count.opaque
• region.horizon.count.opaque
• region.zenith.count.thin
• region.sun.count.thin
• Cloud amount, opaque (percent)(percent.opaque)
• count.thin
• Cloud amount, thin (percent)(percent.thin)

NIM/TSI/M1 - Shadowband glare

When the neutral density filter was removed from the lens, the reflection of the sun from 
the smooth shadowband strip became much brighter causing a glare in the image on clear 
days. To minimize this reflection, a rough surface (the "fuzzy" side of an adhesive velco 
strip) was placed along the length of the shadowband.

• Sunshine Meter(sunny)
• sun.strength
• region.sun.count