EO-1 Data Quality and Sensor Stability with Changing Orbital Precession at the End of a 16 Year Mission

摘要: The Earth Observing One (EO-1) satellite has completed 16 years of observations in early 2017. What started as a technology mission to test various new advancements turned into science and application that extended many beyond the satellite's planned life expectancy. EO-1's primary instruments are spectral imagers: Hyperion, only civilian full spectrum spectrometer (430-2400 nm) orbit; Advanced Land Imager (ALI), prototype for Landsat-8's pushbroom imaging technology. Both Hyperion ALI have continued perform well, but February 2011 ran out fuel necessary maintain orbit, which initiated change precession rate led increasingly earlier equatorial crossing times during its last five years. from original when it was formation flying with Landsat-7 at 10:01am overpass time, results image acquisitions increasing solar zenith angles (SZAs). In this study, we take several approaches characterize data quality SZAs increased. Our show both EO-1 sensors, atmospherically corrected reflectance products within 5 10% mean pre-drift products. No marked trend decreasing or is apparent through 2016, these remain high resource end mission.