Spatio-Temporal Characteristics for Moon-Based Earth Observations
Spatio-temporal characteristics are the crucial conditions for Moon-based Earth observations. In this study, we established a Moon-based Earth observation geometric model by considering the intervisibility condition between a Moon-based platform and observed points on the Earth, which can analyze th...
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ftmdpi:oai:mdpi.com:/2072-4292/12/17/2848/ 2023-08-20T04:02:22+02:00 Spatio-Temporal Characteristics for Moon-Based Earth Observations Jing Huang Huadong Guo Guang Liu Guozhuang Shen Hanlin Ye Yu Deng Runbo Dong agris 2020-09-02 application/pdf https://doi.org/10.3390/rs12172848 EN eng Multidisciplinary Digital Publishing Institute Satellite Missions for Earth and Planetary Exploration https://dx.doi.org/10.3390/rs12172848 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 12; Issue 17; Pages: 2848 Moon-based Earth observations spatio-temporal characteristics intervisibility condition spherical cap Text 2020 ftmdpi https://doi.org/10.3390/rs12172848 2023-08-01T00:01:43Z Spatio-temporal characteristics are the crucial conditions for Moon-based Earth observations. In this study, we established a Moon-based Earth observation geometric model by considering the intervisibility condition between a Moon-based platform and observed points on the Earth, which can analyze the spatio-temporal characteristics of the observations of Earth’s hemisphere. Furthermore, a formula for the spherical cap of the Earth visibility region on the Moon is analytically derived. The results show that: (1) the observed Earth spherical cap has a diurnal period and varies with the nadir point. (2) All the annual global observation durations in different years show two lines that almost coincide with the Arctic circle and the Antarctic circle. Regions between the two lines remain stable, but the observation duration of the South pole and North pole changes every 18.6 years. (3) With the increase of the line-of-sight minimum observation elevation angle, the area of an intervisible spherical cap on the lunar surface is obviously decreased, and this cap also varies with the distance between the barycenter of the Earth and the barycenter of the Moon. In general, this study reveals the effects of the elevation angle on the spatio-temporal characteristics and additionally determines the change of area where the Earth’s hemisphere can be observed on the lunar surface; this information can provide support for the accurate calculation of Moon-based Earth hemisphere observation times. Text Antarc* Antarctic Arctic North Pole South pole South pole MDPI Open Access Publishing Arctic Antarctic The Antarctic South Pole North Pole Remote Sensing 12 17 2848 |
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Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
Moon-based Earth observations spatio-temporal characteristics intervisibility condition spherical cap |
spellingShingle |
Moon-based Earth observations spatio-temporal characteristics intervisibility condition spherical cap Jing Huang Huadong Guo Guang Liu Guozhuang Shen Hanlin Ye Yu Deng Runbo Dong Spatio-Temporal Characteristics for Moon-Based Earth Observations |
topic_facet |
Moon-based Earth observations spatio-temporal characteristics intervisibility condition spherical cap |
description |
Spatio-temporal characteristics are the crucial conditions for Moon-based Earth observations. In this study, we established a Moon-based Earth observation geometric model by considering the intervisibility condition between a Moon-based platform and observed points on the Earth, which can analyze the spatio-temporal characteristics of the observations of Earth’s hemisphere. Furthermore, a formula for the spherical cap of the Earth visibility region on the Moon is analytically derived. The results show that: (1) the observed Earth spherical cap has a diurnal period and varies with the nadir point. (2) All the annual global observation durations in different years show two lines that almost coincide with the Arctic circle and the Antarctic circle. Regions between the two lines remain stable, but the observation duration of the South pole and North pole changes every 18.6 years. (3) With the increase of the line-of-sight minimum observation elevation angle, the area of an intervisible spherical cap on the lunar surface is obviously decreased, and this cap also varies with the distance between the barycenter of the Earth and the barycenter of the Moon. In general, this study reveals the effects of the elevation angle on the spatio-temporal characteristics and additionally determines the change of area where the Earth’s hemisphere can be observed on the lunar surface; this information can provide support for the accurate calculation of Moon-based Earth hemisphere observation times. |
format |
Text |
author |
Jing Huang Huadong Guo Guang Liu Guozhuang Shen Hanlin Ye Yu Deng Runbo Dong |
author_facet |
Jing Huang Huadong Guo Guang Liu Guozhuang Shen Hanlin Ye Yu Deng Runbo Dong |
author_sort |
Jing Huang |
title |
Spatio-Temporal Characteristics for Moon-Based Earth Observations |
title_short |
Spatio-Temporal Characteristics for Moon-Based Earth Observations |
title_full |
Spatio-Temporal Characteristics for Moon-Based Earth Observations |
title_fullStr |
Spatio-Temporal Characteristics for Moon-Based Earth Observations |
title_full_unstemmed |
Spatio-Temporal Characteristics for Moon-Based Earth Observations |
title_sort |
spatio-temporal characteristics for moon-based earth observations |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/rs12172848 |
op_coverage |
agris |
geographic |
Arctic Antarctic The Antarctic South Pole North Pole |
geographic_facet |
Arctic Antarctic The Antarctic South Pole North Pole |
genre |
Antarc* Antarctic Arctic North Pole South pole South pole |
genre_facet |
Antarc* Antarctic Arctic North Pole South pole South pole |
op_source |
Remote Sensing; Volume 12; Issue 17; Pages: 2848 |
op_relation |
Satellite Missions for Earth and Planetary Exploration https://dx.doi.org/10.3390/rs12172848 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs12172848 |
container_title |
Remote Sensing |
container_volume |
12 |
container_issue |
17 |
container_start_page |
2848 |
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1774712800828981248 |