Glossary - B

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Band (channel) - A slice of wavelengths from the electromagnetic spectrum. Landsat ETM+ has eight bands that collect radiation from different parts of the electromagnetic spectrum. Of the eight bands, three bands are visible light, one band is panchromatic, three bands are infrared, and one band is thermal infrared.

Band Gain - The band gain condition detected at the start of a WRS scene. H indicates band acquired in high gain mode. L indicates band acquired in low gain mode.

Bit - A single digital unit of information.

Bit Error Rate - The fraction of a sequence of message bits that are in error (a bit error rate of 10-6 means that there is an average of one error per million bits).

Browse data - A reduced data volume representation of an image scene that can be viewed to determine general ground area coverage and cloud coverage. Browse data typically consist of three spectral bands.