The Atmospheric Infrared Sounder (AIRS) is a facility instrument aboard the
                                          second Earth Observing System (EOS) polar-orbiting platform, EOS Aqua. In
                                          combination with the Advanced Microwave Sounding Unit (AMSU) and the Humidity
                                          Sounder for Brazil (HSB), AIRS constitutes an innovative atmospheric sounding
                                          group of visible, infrared, and microwave sensors.  AIRS data will be generated
                                          continuously. Global coverage will be obtained twice daily (day and night) on a
                                          1:30pm sun synchronous orbit from a 705-km altitude.
                                          
                                          The AIRS Visible/Near Infrared (VIS/NIR) Level 1B QA Subset contains Quality
                                          Assurance (QA) parameters that a may use of filter AIRS VIS/NIR Level 1B
                                          radiance data to create a subset of analysis. It includes "state" that user
                                          should check before using any VIS/NIR Level 1B data radiance and "glintlat",
                                          "glintlon", and "sun_glint_distant" that users can use to check for possibility
                                          of solar glint contamination.
                                          
                                          AIRS VIS/NIR Level 1B radiance data can be found in AIRVBRAD.
                                          
                                          (The Shortname for this product is AIRVBQAP)
                                          
                                          Coverage: Global, Twice Daily (Daytime and Nighttime)
                                          Resolution: 2.3 km IFOV at nadir
                                          Spectral Range: Four channels, from 0.4 - 1.0 um:
                                          Wavelengths at 50% peak response:
                                          Channel 1 0.41 um - 0.44 um
                                          Channel 2 0.58 um - 0.68 um
                                          Channel 3 0.71 um - 0.92 um
                                          Channel 4 0.49 um - 0.94 um