Simulation Study of Geometric Characteristics and Coverage for Moon-Based Earth Observation in the Electro-Optical Region

Ren, Yilun; Guo, Huadong; Liu, Guang; Ye, Hanlin

doi:10.1109/jstars.2017.2711061

Cited by 37 publications

(28 citation statements)

References 24 publications

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“…In order to understand the observational characteristics of Moon-based Earth observations, we need to first understand the precise geometric relationship between the Sun, the Earth and the Moon. The basis of Moon-based observation geometry research is to accurately understand the operational law, and to obtain the position and attitude information of these three celestial bodies, through which we can get the observation characteristics and angular characteristics of the Moon-based observation platform [36,37]. We know that all the celestial bodies have their own fixed orbit.…”

Section: Data and Simulation Systemmentioning

confidence: 99%

“…The main process is shown in Figure 1. we can get the observation characteristics and angular characteristics of the Moon-based observation platform [36,37]. We know that all the celestial bodies have their own fixed orbit.…”

Section: Data and Simulation Systemmentioning

confidence: 99%

“…Based on the ephemeris data and Earth orientation parameters, the reference system transformation and a simulation system of Moon-based Earth observations were developed. The transformation process includes many reference systems [36]. In addition to reference systems related to the celestial bodies, there are some other reference systems for Moon-based sensors, but they were not analyzed in this paper.…”

Section: Transformation Between the Reference Systemsmentioning

confidence: 99%

“…In recent years, some scholars in Guo's team have devoted themselves to the study of the observation geometry and coverage characteristics of Moon-based platforms, and others are working on the detailed analysis of the geometric model. Ren and Guo developed the reference systems' transformation and simulation system based on the Jet Propulsion Laboratory (JPL) ephemerides and Earth orientation parameters, and defined an effective coverage parameter for assessing the ability of optical coverage [36]. Afterward, they summarized the global angular characteristics of the Moon-based Earth observations [37].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Long-Term Moon-Based Observation Characteristics for Arctic and Antarctic

et al. 2019

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The Antarctic and Arctic have always been critical areas of earth science research and are sensitive to global climate change. Global climate change exhibits diversity characteristics on both temporal and spatial scales. Since the Moon-based earth observation platform could provide large-scale, multi-angle, and long-term measurements complementary to the satellite-based Earth observation data, it is necessary to study the observation characteristics of this new platform. With deepening understanding of Moon-based observations, we have seen its good observation ability in the middle and low latitudes of the Earth’s surface, but for polar regions, we need to further study the observation characteristics of this platform. Based on the above objectives, we used the Moon-based Earth observation geometric model to quantify the geometric relationship between the Sun, Moon, and Earth. Assuming the sensor is at the center of the nearside of the Moon, the coverage characteristics of the earth feature points are counted. The observation intervals, access frequency, and the angle information of each point during 100 years were obtained, and the variation rule was analyzed. The research showed that the lunar platform could carry out ideal observations for the polar regions. For the North and South poles, a continuous observation duration of 14.5 days could be obtained, and as the latitude decreased, the duration time was reduced to less than one day at the latitude of 65° in each hemisphere. The dominant observation time of the North Pole is concentrated from mid-March to mid-September, and for the South Pole, it is the rest of the year, and as the latitude decreases, it extends outward from both sides. The annual coverage time and frequency will change with the relationship between the Moon and the Earth. This study also proves that the Moon-based observation has multi-angle observation advantages for the Arctic and the Antarctic areas, which can help better understand large-scale geoscientific phenomena. The above findings indicate that the Moon-based observation can be applied as a new type of remote sensing technology to the observation field of the Earth’s polar regions.

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Section: Data and Simulation Systemmentioning

confidence: 99%

Section: Data and Simulation Systemmentioning

confidence: 99%

Section: Transformation Between the Reference Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of Long-Term Moon-Based Observation Characteristics for Arctic and Antarctic

et al. 2019

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“…Following this stream of development, an L-band Moon-Based SAR for monitoring large-scale phenomena related to global environmental changes was discussed [9] and the coverage performance of the Moon-based platform for global change detection [10]. The geometric modeling and coverage for a lunar-based observation by using Jet Propulsion Laboratory (JPL) ephemerides data were addressed in [11]. These studies are focused on the performance analysis and…”

Section: Introductionmentioning

confidence: 99%

On Signal Modeling of Moon-Based Synthetic Aperture Radar (SAR) Imaging of Earth

Chen

2018

Remote Sensing

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Abstract:The Moon-based Synthetic Aperture Radar (Moon-Based SAR), using the Moon as a platform, has a great potential to offer global-scale coverage of the earth's surface with a high revisit cycle and is able to meet the scientific requirements for climate change study. However, operating in the lunar orbit, Moon-Based SAR imaging is confined within a complex geometry of the Moon-Based SAR, Moon, and Earth, where both rotation and revolution have effects. The extremely long exposure time of Moon-Based SAR presents a curved moving trajectory and the protracted time-delay in propagation makes the "stop-and-go" assumption no longer valid. Consequently, the conventional SAR imaging technique is no longer valid for Moon-Based SAR. This paper develops a Moon-Based SAR theory in which a signal model is derived. The Doppler parameters in the context of lunar revolution with the removal of 'stop-and-go' assumption are first estimated, and then characteristics of Moon-Based SAR imaging's azimuthal resolution are analyzed. In addition, a signal model of Moon-Based SAR and its two-dimensional (2-D) spectrum are further derived. Numerical simulation using point targets validates the signal model and enables Doppler parameter estimation for image focusing.

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Frontiers of Moon-Based Earth Observation

Guo

Liu

2019

Scientific Satellite and Moon-Based Earth Observation for Global Change

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Simulation Study of Geometric Characteristics and Coverage for Moon-Based Earth Observation in the Electro-Optical Region

Cited by 37 publications

References 24 publications

Analysis of Long-Term Moon-Based Observation Characteristics for Arctic and Antarctic

Analysis of Long-Term Moon-Based Observation Characteristics for Arctic and Antarctic

On Signal Modeling of Moon-Based Synthetic Aperture Radar (SAR) Imaging of Earth

Frontiers of Moon-Based Earth Observation

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