Alok K. Shrestha received the bachelor’s degree in electronics engineering from Tribhuvan University, Kirtipur, Nepal, in 2003, and the M.Sc. degree in electrical engineering from South Dakota State University, Brookings, SD, USA, in 2010. He is currently pursuing the Ph.D. degree in atmospheric science with Hampton University, Hampton, VA, USA. Since 2010, he has been as Senior Research Scientist with Science Systems Applications, Inc., Hampton, VA, USA, where he is involved in generating a long-term Earth’s radiation budget (ERB) data set from ERB Experiment scanner and nonscanner observations. His research interests include radiometric calibration and validation of various satellite sensors to evaluate their performance and several remote-sensing instruments including broadband, multispectral, as well as hyper spectral sensors, including pushbroom and whiskbroom instruments.