PYE/ECOR/M1 - Reprocessed: Wind direction offset corrected

The SMET wind direction was consistently 15 to 20 degrees larger than the wind direction 
determined by the ECOR. The ECOR was mistakenly aligned to magnetic north during this 
period.

The magnetic declination is 14 deg. 58 min., which explains most of the difference.

The ECOR data for this period were reprocessed in November 2006 to add 15 degrees to the 
wind direction.  No other changes were made to the data. The reprocessed data were 
archived in January 2007.

• vector averaged wind direction(wind_dir)

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.

• PNG data stream - documentation not supported(png)

• Pixel count: number total thin(count.thin)
• Pixel count: number thin in horizon area(region.horizon.count.thin)
• Pixel count: number total opaque(count.opaque)
• Pixel count: number opaque in horizon area(region.horizon.count.opaque)
• Pixel count: number opaque in zenith circle(region.zenith.count.opaque)
• Sunshine meter(sunny)
• Pixel count: number opaque in sun circle(region.sun.count.opaque)
• Pixel count: number thin in sun circle(region.sun.count.thin)
• Percent opaque cloud(percent.opaque)
• Percentage thin cloud(percent.thin)
• Pixel count: number thin in zenith circle(region.zenith.count.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.

• Relative \'strength\' of direct sun(sun.strength)
• Pixel count: number total in sun circle(region.sun.count)
• Sunshine meter(sunny)

PYE/ECOR/M1 - Flux Data Suspect For Some Wind Directions

For some wind directions the horizontal fetch was not representative 
of the field in which the AMF was located.  Therefore, for the wind 
direction ranges 66-92 (buildings and trees) degrees, the fluxes are 
affected by insufficient fetch and  surfaces, buildings, or vegetation 
that are not similar to the local field conditions.

• CO2 flux(fc)
• latent heat flux(lv_e)
• Friction velocity(ustar)
• h(h)