Passive Vibration Isolation and Absorber System for Earth Imaging from the International Space Station (ISS)

Ranganathan, Jaganathan; Olsen, Douglas R.; Semke, William H.

doi:10.1007/978-1-4614-2419-2_9

Cited by 1 publication

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“…Applying the algorithm to the images acquired by the ISSAC [2,9] and comparing the results with Google Earth TM , they estimated that the algorithm has a geolocation accuracy of 190 ± 140 m with maximum errors less than 500 m in nadir points if the orientation of the sensor in the ISS body-fixed coordinate system was accounted for. This accuracy is well within the inherent geolocation uncertainty of up to ~800 m, mainly due to imprecise knowledge of the ISS state and attitude parameters required to perform the geolocation algorithm.…”

Section: Introductionmentioning

confidence: 99%

Improving the Geolocation Algorithm for Sensors Onboard the ISS: Effect of Drift Angle

et al. 2014

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Abstract:The drift angle caused by the Earth's self-rotation may introduce rotational displacement artifact on the geolocation results of imagery acquired by an Earth observing sensor onboard the International Space Station (ISS). If uncorrected, it would cause a gradual degradation of positional accuracy from the center towards the edges of an image. One correction method to account for the drift angle effect was developed. The drift angle was calculated from the ISS state vectors and positional information of the ground nadir point of the imagery. Tests with images acquired by the International Space Station Agriculture Camera (ISSAC) using Google Earth TM as a reference indicated that applying the drift angle correction can reduce the residual geolocation error for the corner points of the ISSAC images from over 1000 to less than 500 m. The improved geolocation accuracy is well within the inherent geolocation uncertainty of up to 800 m, mainly due to imprecise knowledge of the ISS attitude and state parameters required to perform the geolocation algorithm.

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Section: Introductionmentioning

confidence: 99%