The Moon,Earth’s only natural satellite,is a potential new platform for Earth observation.Moreover,with the wide applicability of the angular information from remote sensing data,it has been attracting increasingly m...The Moon,Earth’s only natural satellite,is a potential new platform for Earth observation.Moreover,with the wide applicability of the angular information from remote sensing data,it has been attracting increasingly more attention.Accordingly,this study focuses on the angular characteristics of Moon-based Earth observations.Using ephemeris DE430 and Earth orientation parameters,the position and attitude of the Sun,Earth,and Moon were obtained and their coordinates normalized to a single framework using coordinate transformations between the related reference systems.Then,an angular geometric model of Moon-based Earth observations was constructed,and the corresponding angular algorithms were presented.The results revealed the angular range and distribution characteristics of Moon-based Earth observations.For every point on the surface of the Earth,the view and solar zenith angles all vary widely,which decreases with increasing latitude.The view and solar zenith angles all vary widely with the largest range of values in the equatorial and polar regions and a smaller range of values in mid-latitudes.Furthermore,the range of solar angles of Moon-based Earth observations is the same as that of alltime solar angles,indicating the potential for monitoring and understanding large-scale geoscientific phenomena using Moon-based Earth observations.展开更多
The Moon is a potential new platform for Earth observation.The advantages of its large-scale observational scope,long temporal duration,and multi-layer detecting of the Earth will undoubtedly advance our understanding...The Moon is a potential new platform for Earth observation.The advantages of its large-scale observational scope,long temporal duration,and multi-layer detecting of the Earth will undoubtedly advance our understanding of the Earth system.To carry out the observations from a Moon-based optical sensor,the geolocation error caused by exterior orientation elements need to be investigated.This paper analyses the error effects of exterior orientation elements on geolocation for an optical sensor.To estimate the error,we present a geometric image model and utilise some parameters to measure the image offsets.Through a large number of numerical simulations,the results demonstrate that the image offsets are not obvious influenced by the distance and observation angle at mid-high latitude of the Moon and have linear correlation with the increasing errors of the exterior orientation elements.Further,the relationship between the spatial resolution and errors of exterior orientation elements are revealed.Finally,the error characteristics for Moon-based Earth observation are discussed.It is expected that the conclusion drawn in this paper could support the study of a Moon-based Earth observation optical sensor.展开更多
基金supported by National Natural Science Foundation of China:[grant number 41590852]Key Research Program of Frontier Sciences,CAS:[grant number QYZDY-SSW-DQC026].
文摘The Moon,Earth’s only natural satellite,is a potential new platform for Earth observation.Moreover,with the wide applicability of the angular information from remote sensing data,it has been attracting increasingly more attention.Accordingly,this study focuses on the angular characteristics of Moon-based Earth observations.Using ephemeris DE430 and Earth orientation parameters,the position and attitude of the Sun,Earth,and Moon were obtained and their coordinates normalized to a single framework using coordinate transformations between the related reference systems.Then,an angular geometric model of Moon-based Earth observations was constructed,and the corresponding angular algorithms were presented.The results revealed the angular range and distribution characteristics of Moon-based Earth observations.For every point on the surface of the Earth,the view and solar zenith angles all vary widely,which decreases with increasing latitude.The view and solar zenith angles all vary widely with the largest range of values in the equatorial and polar regions and a smaller range of values in mid-latitudes.Furthermore,the range of solar angles of Moon-based Earth observations is the same as that of alltime solar angles,indicating the potential for monitoring and understanding large-scale geoscientific phenomena using Moon-based Earth observations.
基金supported by the National Natural Science Foundation of China[Grant No.41590852]the Key Research Program of Frontier Sciences,CAS[Grant No.QYZDY-SSW-DQC026]the Director Graduate Student Foundation of Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences[Grant No.Y7SY1400CX].
文摘The Moon is a potential new platform for Earth observation.The advantages of its large-scale observational scope,long temporal duration,and multi-layer detecting of the Earth will undoubtedly advance our understanding of the Earth system.To carry out the observations from a Moon-based optical sensor,the geolocation error caused by exterior orientation elements need to be investigated.This paper analyses the error effects of exterior orientation elements on geolocation for an optical sensor.To estimate the error,we present a geometric image model and utilise some parameters to measure the image offsets.Through a large number of numerical simulations,the results demonstrate that the image offsets are not obvious influenced by the distance and observation angle at mid-high latitude of the Moon and have linear correlation with the increasing errors of the exterior orientation elements.Further,the relationship between the spatial resolution and errors of exterior orientation elements are revealed.Finally,the error characteristics for Moon-based Earth observation are discussed.It is expected that the conclusion drawn in this paper could support the study of a Moon-based Earth observation optical sensor.
