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Instrument: OTD : Optical Transient Detector
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The Optical Transient Detector (OTD) is a highly compact
combination of optical and electronic elements. It was developed
as an in-house project at NASA's Marshall Space Flight Center in
Huntsville, Alabama. The name, Optical Transient Detector,
refers to its capability to detect the momentary changes in an
optical scene which indicate the occurrence of lightning. The
OTD instrument is a major advance over previous technology in
that it can gather lightning data under daytime conditions as
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