NASA's small satellite missions for Earth observation

Neeck, Steven P.; Magner, Thomas J.; Paules, Granville

doi:10.1016/j.actaastro.2004.09.034

Cited by 48 publications

(27 citation statements)

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“…The aim of NASA's Earth Science Enterprise (ESE) is to develop a scientific understanding of the Earth system and its response to natural and human-induced changes to enable improved prediction of climate, weather, and natural hazards for present and future generations (Neeck et al 2005). The ESE has an end-to-end strategy to ensure that information, understanding and capabilities derived from its research programme achieve maximum usefulness to the scientific and decision-making communities.…”

Section: Americamentioning

confidence: 99%

Small satellite remote sensing and applications – history, current and future

Xue

Jin

et al. 2008

International Journal of Remote Sensing

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Section: Americamentioning

confidence: 99%

Small satellite remote sensing and applications – history, current and future

Xue

Jin

et al. 2008

International Journal of Remote Sensing

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“…For example, China has been working on the establishment of the meteorological Fengyun (FY) satellite series, oceanic Haiyang (HY) satellite series, Earth resource Ziyuan (ZY) satellite series [1,2], Environment and Disaster Monitoring Huanjing (HJ) satellite series, and China High-resolution Earth Observation System (CHEOS) [3,4]. The United States has developed an EOS plan [5], Earth Science Business Plan (ESE), and Integrated Earth Observation System (IEOS) [6], and it has launched numerous satellites including Landsat, Terra, Earth Observing-1 (EO-1), and other satellites [7]. Other countries such as Russia [8], Japan [9], Canada [10] and India [11] have also put forward corresponding Earth observation plans.…”

Section: Introductionmentioning

confidence: 99%

Improving Geometric Performance for Imagery Captured by Non-Cartographic Optical Satellite: A Case Study of GF-1 WFV Imagery

et al. 2018

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Abstract:Numerous countries have established their own Earth observing systems (EOSs) for global change research. Data acquisition efforts are generally only concerned with the completion of the mission regardless of the potential to expand into other areas, which reduces the application effectiveness of Earth observation data. This paper explores the cartographic possibility of images being not initially intended for surveying and mapping, and a novel method is proposed to improve the geometric performance. First, the rigorous sensor model (RSM) is recovered from the rational function model (RFM), and then the system errors of the non-cartographic satellite's imagery are compensated by using the conventional geometric calibration method based on RSM; finally, a new and improved RFM is generated. The advantage of the method over traditional ones is that it divides the errors into static errors and non-static errors for each image during the improvement process. Experiments using images collected with the Gaofen-1 (GF-1) wide-field view (WFV) camera demonstrate that the orientation accuracy of the proposed method is within 1 pixel for both calibration and validation images, and the obvious high-order system errors are eliminated. Moreover, a block adjustment test shows that the vertical accuracy is improved from 21 m to 11 m with four ground control points (GCPs) after compensation, which can fulfill requirements for 1:100,000 stereo mapping in mountainous areas. Generally, the proposed method can effectively improve the geometric potential for images captured by non-cartographic satellite.

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“…In recent decades, SFF has been identified as an enabling technology for many future space missions [15]. It is because that the functionality of a single complex spacecraft can be distributed by a cluster of smaller, closely flying spacecraft.…”

Section: Introductionmentioning

confidence: 99%

Fuel-optimal Lorentz-augmented Spacecraft Formations Using Novelty Minimum Sliding Mode Error Feedback Controller

Lu¹,

Cao²,

Zhang³

et al. 2017

dtcse

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Abstract.A dynamics model of satellite formation flying (SFF) is derived in an elliptical orbit with the existence of J2 perturbation and the Lorentz force. The Lorentz force is considered as the propellantless electromagnetic propulsion for orbital maneuvering and maintenance. However, the direction of Lorentz force is limited by the local magnetic field and the velocity of the spacecraft with respect to the local magnetic field, which is unable to provide the required control acceleration timely; therefore, it always works as an auxiliary strategy to reduce the fuel consumptions. Based on the above assumptions, the fuel-optimal control scheme is proposed for the SFF based on the minimum sliding mode error feedback controller (MSMEFC), which is implemented by using the thruster control and Lorentz force. Moreover, the optimal trajectories of the required specific charge of deputy Lorentz spacecraft and the thruster-generated control acceleration have been developed with details, respectively. Numerical examples are presented to demonstrate the efficacy of the proposed controller to maneuver and maintenance the SFF with the optimal fuel consumptions.

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NASA's small satellite missions for Earth observation

Cited by 48 publications

References 1 publication

Small satellite remote sensing and applications – history, current and future

Small satellite remote sensing and applications – history, current and future

Improving Geometric Performance for Imagery Captured by Non-Cartographic Optical Satellite: A Case Study of GF-1 WFV Imagery

Fuel-optimal Lorentz-augmented Spacecraft Formations Using Novelty Minimum Sliding Mode Error Feedback Controller

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