Satellite Attitude Tracking for Earth Pushbroom Imaginary with Forward Motion Compensation

Abdollahi, Abbas; Dastranj, Mohamad Reza; Riahi, Amin Reza

doi:10.14257/ijca.2014.7.1.39

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…This would normally lead to elongated ground pixels (approx. 50 × 500 m 2 ), but by using forward motion compensation (FMC), the instrument can be periodically altered in the along-track direction such that each ground pixel is sampled for a time period longer than the actual satellite overpass time (see, e.g., Sandau, 2010;Abdollahi et al, 2014). FMC has the evident drawback that the coverage along the satellite track is discontinuous, since no data are sampled when the instrument returns to the starting forward position.…”

Section: Mission and Instrument Conceptmentioning

confidence: 99%

Towards spaceborne monitoring of localized CO2 emissions: an instrument concept and first performance assessment

et al. 2020

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Abstract. The UNFCCC (United Nations Framework Convention on Climate Change) requires the nations of the world to report their carbon dioxide (CO2) emissions. The independent verification of these reported emissions is a cornerstone for advancing towards the emission accounting and reduction measures agreed upon in the Paris Agreement. In this paper, we present the concept and first performance assessment of a compact spaceborne imaging spectrometer with a spatial resolution of 50×50 m2 that could contribute to the “monitoring, verification and reporting” (MVR) of CO2 emissions worldwide. CO2 emissions from medium-sized power plants (1–10 Mt CO2 yr−1), currently not targeted by other spaceborne missions, represent a significant part of the global CO2 emission budget. In this paper we show that the proposed instrument concept is able to resolve emission plumes from such localized sources as a first step towards corresponding CO2 flux estimates. Through radiative transfer simulations, including a realistic instrument noise model and a global trial ensemble covering various geophysical scenarios, it is shown that an instrument noise error of 1.1 ppm (1σ) can be achieved for the retrieval of the column-averaged dry-air mole fraction of CO2 (XCO2). Despite a limited amount of information from a single spectral window and a relatively coarse spectral resolution, scattering by atmospheric aerosol and cirrus can be partly accounted for in the XCO2 retrieval, with deviations of at most 4.0 ppm from the true abundance for two-thirds of the scenes in the global trial ensemble. We further simulate the ability of the proposed instrument concept to observe CO2 plumes from single power plants in an urban area using high-resolution CO2 emission and surface albedo data for the city of Indianapolis. Given the preliminary instrument design and the corresponding instrument noise error, emission plumes from point sources with an emission rate down to the order of 0.3 Mt CO2 yr−1 can be resolved, i.e., well below the target source strength of 1 Mt CO2 yr−1. This leaves a significant margin for additional error sources, like scattering particles and complex meteorology, and shows the potential for subsequent CO2 flux estimates with the proposed instrument concept.

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Section: Mission and Instrument Conceptmentioning

confidence: 99%

Towards spaceborne monitoring of localized CO2 emissions: an instrument concept and first performance assessment

et al. 2020

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“…Different control methods using reaction wheels as control actuator have been investigated in reference [9] for an Earth observation satellite with push-broom imaging.…”

Section: Introductionmentioning

confidence: 99%

Spaceborne Push-Broom Image Guidance, Attitude Realization Errors: A System Engineering Approach

2016

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During the preliminary phase of a satellite system design, a complete model of the satellite may not be available due to the uncertainties in the design. As a remedy, a simple methodology based on system engineering approach may be used to rapidly determine pointing requirements to initiate requirement analysis phase of the satellite design. For this purpose, the effects of the pointing accuracy and stability requirements on the spaceborne image acquisition are identified for the push-broom sensor applications. Further, image guidance algorithms are identified to obtain proper attitude profiles which are used in line of sight analysis. To determine the relationship between the geometrical properties/requirements of the images and the pointing requirements, line of sight analysis is carried out and implications for the selection of the specifications of the electro-optic payload equipment are discussed. Moreover, a simplified mathematical model is established in order to determine satellite stability requirement related to the scan speed of the electro-optic payload equipment. The method is applied to an Earth observation satellite with a push-broom electro-optic sensor which has a sub-meter level ground sampling distance. The presented analysis should also be of interest to optical Earth observation satellite system mission B Erhan Topal analysis and general satellite design, particularly attitude and orbit control sub-system design.

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“…50 × 500 m 2 ), but by using forward motion 10 compensation (FMC), the instrument can be periodically altered in the along-track direction, such that each ground pixel is sampled for a time period longer than the actual satellite overpass time (see e.g. Sandau, 2010;Abdollahi et al, 2014). FMC has the evident drawback that the coverage along the satellite track is discontinuous, since no data are sampled when the instrument returns to the starting forward position.…”

mentioning

confidence: 99%

Towards space-borne monitoring of localized CO2 emissions: an instrument concept and first performance assessment

Strandgren¹,

Krutz²,

Wilzewski³

et al. 2020

Preprint

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Abstract. The UNFCCC (United Nations Framework Convention on Climate Change) requires the nations of the world to report their carbon dioxide (CO2) emissions. Independent verification of these reported emissions is a corner stone for advancing towards emission accounting and reduction measures agreed upon in the Paris agreement. In this paper, we present the concept and first performance assessment of a compact space-borne imaging spectrometer that could support the task of "monitoring, verification, reporting" (MVR) of CO2 emissions worldwide. With a single spectral window in the short-wave infrared spectral region and a spatial resolution of 50 x 50 m2, the goal is to reliably estimate the CO2 emissions from localized sources down to a source strength of approx. 1 MtCO2 yr-1, hence complementing other planned CO2 monitoring missions, like the planned European Carbon Constellation (CO2M). Resolving CO2 plumes also from medium-sized power plants (1–10 MtCO2 yr-1) is of key importance for independent quantification of CO2 emissions from the coal-fired power plant sector. Through radiative transfer simulations, including a realistic instrument noise model and a global trial ensemble covering various geophysical scenarios, it is shown that an instrument noise error of 1.1 ppm (1σ) can be achieved for the retrieval of the column-averaged dry-air mole fraction of CO2 (XCO2). Despite limited amount of information from a single spectral window and a relatively coarse spectral resolution, scattering by atmospheric aerosol and cirrus can be partly accounted for in the XCO2 retrieval, with deviations of at most 4.0 ppm from the true abundance for 68 % of the scenes in the global trial ensemble. We further simulate the ability of the proposed instrument concept to observe CO2 plumes from single power plants in an urban area using high-resolution CO2 emission and surface albedo data for the city of Indianapolis. Given the preliminary instrument design and the corresponding instrument noise error, emission plumes from point sources with an emission rate down to the order of 0.3 MtCO2 yr-1 can be resolved, i.e. well below the target source strength of 1 MtCO2 yr-1. Hence, the proposed instrument concept could be able to resolve and quantify the CO2 plumes from localized point sources responsible for approx. 90 % of the power plant CO2 emission budget, assuming global coverage through a fleet of sensors and favorable conditions with respect to illumination and particle scattering.

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Satellite Attitude Tracking for Earth Pushbroom Imaginary with Forward Motion Compensation

Abstract: Abstract

Cited by 4 publications

References 5 publications

Towards spaceborne monitoring of localized CO<sub>2</sub> emissions: an instrument concept and first performance assessment

Towards spaceborne monitoring of localized CO<sub>2</sub> emissions: an instrument concept and first performance assessment

Spaceborne Push-Broom Image Guidance, Attitude Realization Errors: A System Engineering Approach

Towards space-borne monitoring of localized CO<sub>2</sub> emissions: an instrument concept and first performance assessment

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Satellite Attitude Tracking for Earth Pushbroom Imaginary with Forward Motion Compensation

Abstract: Abstract

Cited by 4 publications

References 5 publications

Towards spaceborne monitoring of localized CO&lt;sub&gt;2&lt;/sub&gt; emissions: an instrument concept and first performance assessment

Towards spaceborne monitoring of localized CO&lt;sub&gt;2&lt;/sub&gt; emissions: an instrument concept and first performance assessment

Spaceborne Push-Broom Image Guidance, Attitude Realization Errors: A System Engineering Approach

Towards space-borne monitoring of localized CO&lt;sub&gt;2&lt;/sub&gt; emissions: an instrument concept and first performance assessment

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Towards spaceborne monitoring of localized CO<sub>2</sub> emissions: an instrument concept and first performance assessment

Towards spaceborne monitoring of localized CO<sub>2</sub> emissions: an instrument concept and first performance assessment

Towards space-borne monitoring of localized CO<sub>2</sub> emissions: an instrument concept and first performance assessment