Description: | Due to the persistent cloudy conditions at this site the shading is rarely evident in the
data. But at approximately 1010GMT everyday during from approximately 12/2/2009 to
1/11/2010 the NIP is shaded by the AOS tower. Data review indicates that only the NIP
(short_direct_normal) is obstructed when the sun is at 130 to 132 deg azimuth during the time
period specified.
NIP data are not recoverable. However, short_direct_normal can be reconstructed by
applying the following formula:
Short_direct_normal = (down_short_hemisp-down_short_diffuse_hemisp)/cos(Zenith angle) |