Fractional value of valid pixels globally
Global mean channel 1 (0.63 micron) reflectance
Global mean channel 2 (0.86 micron) reflectance
Global mean channel 3a (1.60 micron) reflectance
Global mean channel 3b (3.75 micron) brightness temperature (K)
Global mean channel 4 (11.0 micron) brightness temperature (K)
Global mean channel 5 (12.0 micron) brightness temperature (K)