PDS_VERSION_ID         = PDS3
RECORD_TYPE            = STREAM
OBJECT                 = TEXT
  PUBLICATION_DATE     = 2009-03-17
  INTERCHANGE_FORMAT   = ASCII
  NOTE                 = "Description of efficiency directory contents."
END_OBJECT             = TEXT
END
   
Efficiency directory:
---------------------

This directory contains various files necessary for calculating the 
transmission of the ISS cameras as a function of wavelength:

 ccdqe.tab - CCD quantum efficiencies for NAC and WAC.
 na_optics.tab and wa_optics.tab - Optics transmission functions.
 solarflux.tab - Solar spectrum.
 omega0.tab - Omega_0 (total sensitivity) factors for common filter 
  combinations.

The systrans directory contains the non-wavelength-integrated system 
transmission values (QE*optics*filter1*filter2) for each filter combination. 
Columns in systrans files are as follows:

 1st column: Wavelength (nm)  
 2nd column: Transmitted Flux
 3rd column: Cumulative integral of transmitted flux
 4th column: Cumulative integral of wavelength times transmitted flux

This directory also includes the files na_effwl.tab and wa_effwl.tab, which
give the central and effective wavelengths of each filter combination as well 
as their FWHM in nm.