Dark-Image Modeling Analysis of LAPAN-A3 Satellite Imager

Patria Rachman Hakim and A. Hadi Syafrudin and Wahyudi Hasbi and Sartika Salaswati (2016) Dark-Image Modeling Analysis of LAPAN-A3 Satellite Imager. Proceedings International Seminar on Aerospace Science and Technology (ISAST) 2016. pp. 58-66.

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Abstract

To produce a high quality image, raw image produced by LAPAN-A3 satellites imager must be systematically corrected, both in geometric and radiometric aspect. One important variable that is used in radiometric correction process is dark-image, which is an image produced when the camera is closed, thus the camera does not receive any light source. Ideally, the dark-image is acquired directly in orbit just before image acquisition period, but it cannot be done since LAPAN-A3 satellite does not have auto-calibration mechanism or referenced detector. This research aims to model the dark-image of both LAPAN-A3 imagers as a function of several imager intrinsic parameters and period of imager operation, using least-square linear regression method. The resulted model is then used to estimate the dark-image value which is subsequently used in systematic radiometric correction calculation. Experiments and calculation that have been done show that matrix imager has constant dark-image during entire acquisition period, and can be accurately modeled using simple equation as a function of camera parameter only. Meanwhile, multispectral imager has an increasing monotonic dark-image response during acquisition period, which is caused by significant detector temperature increase. Dark-image of multispectral imager can be modeled using linear equation as function of operating-time only, but the model could only produce good estimation for specific camera parameter. All of these results can be used as references in processing raw data of LAPAN-A3 satellites imager, so that the final image produced will have a high radiometric quality

Item Type: Article
Additional Information: ISBN 978-602-6465-03-0
Uncontrolled Keywords: radiometric correction, dark-image, least-square, intrinsic parameter, temperature
Subjects: Teknologi Penerbangan dan Antariksa > Penelitian, Pengembangan, Perekayasaan, dan Pemanfaatan > Teknologi Satelit
Divisions: Deputi Teknologi Penerbangan Dan Antariksa > Pusat Teknologi Penerbangan
Depositing User: Dinar Indrasasi
Date Deposited: 28 Sep 2021 12:20
Last Modified: 30 Sep 2021 00:14
URI: http://repositori.lapan.go.id/id/eprint/1287

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