Example direct and diffuse sky spectral irradiances for LIDAR SIMULATION in a black sky.
This example assumes the run is done for a 1 nm band from 487.5 to 488.5 containing input from a 488.0 nm Lidar,
plus other bands that can be anything (e.g., 5 or 10 nm bands).  
For input files having ONLY ONE input wavelength (not counting the end of file record of negative values), 
the sky is automatically made black (Ed_direct = Ed_diffuse = 0.0) at all bands other than the Lidar wavelength, 
which is all direct Ed (the Lidar beam and nothing else).
For this example at 488 nm, the run bands defined in the User Interface MUST include a band from 487.5 go 488.5.
Also place the sun at the zenith (zenith angle 0.0) in the User Interface.
wavelenth   Ed_direct   Ed_diffuse
   (nm)    (W/m^2 nm)     (W/m^2 nm)
 488.0        1.0          0.0
  -1.0       -1.0         -1.0