Radiometric Assessment of ICESat-2 over Vegetated Surfaces
نویسندگان
چکیده
The ice, cloud, and land elevation satellite-2 (ICESat-2) is providing global measurements to the science community. ICESat-2 measures height of Earth’s surface using a photon counting laser altimeter, ATLAS (advanced topographic altimetry system). As system, number reflected photons per shot, or radiometry, function primarily transmitted energy, solar elevation, reflectance, atmospheric scattering attenuation. In this paper, we explore relationship between detected attenuation in atmosphere against observed radiometry for three general forest types, as well day versus night. Through analysis, found that strong beam exceeds pre-launch design cases boreal tropical forests but underestimates predicted over temperate by approximately half photon. weak beams, contrast, exceed all conditions factor two six types. We also observe signal from acquisitions lower than night 10% 40% respectively. This research detection ratio each beam-pair was 4:1 values. presents concept radiometric profiles; these profiles provide path calculating vegetation structure. results study are intended be informative perhaps serve benchmark filtering analysis ATL08 data products vegetated surfaces.
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2022
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs14030787