The Optical Transient Detector (OTD): Instrument Characteristics and Cross-Sensor Validation

• DOI: 10.1175/1520-0426(2000)017<0441:totdoi>2.0.co;2
• Publication Date: 2002-07-27T12:02:39Z
• Authors: D. J. Boccippio; W. Koshak; R. Blakeslee; K. Driscoll; D. Mach; D. Buechler; W. Boeck; H. J. Christian; S. J. Goodman

Abstract Lightning data from the U.S. National Lightning Detection Network (NLDN) are used to perform preliminary validation of the satellite-based Optical Transient Detector (OTD). Sensor precision, accuracy, detection efficiency, and biases of the deployed instrument are considered. The sensor is estimated to have, on average, about 20–40-km spatial and better than 100-ms temporal accuracy. The detection efficiency for cloud-to-ground lightning is about 46%–69%. It is most likely slightly higher for intracloud lightning. There are only marginal day/night biases in the dataset, although 55- or 110-day averaging is required to remove the sampling-based diurnal lightning cycle bias.