title: Geometric Calibration and Validation of Kompsat-3A AEISS-A Camera.
abstract: Kompsat-3A, which was launched on 25 March 2015, is a sister spacecraft of the Kompsat-3 developed by the Korea Aerospace Research Institute (KARI). Kompsat-3A's AEISS-A (Advanced Electronic Image Scanning System-A) camera is similar to Kompsat-3's AEISS but it was designed to provide PAN (Panchromatic) resolution of 0.55 m, MS (multispectral) resolution of 2.20 m, and TIR (thermal infrared) at 5.5 m resolution. In this paper we present the geometric calibration and validation work of Kompsat-3A that was completed last year. A set of images over the test sites was taken for two months and was utilized for the work. The workflow includes the boresight calibration, CCDs (charge-coupled devices) alignment and focal length determination, the merge of two CCD lines, and the band-to-band registration. Then, the positional accuracies without any GCPs (ground control points) were validated for hundreds of test sites across the world using various image acquisition modes. In addition, we checked the planimetric accuracy by bundle adjustments with GCPs.
authors: Korea Aerospace Research Institute, Daejeon 34133, Korea. dcivil@kari.re.kr.
authors: Doocheon
authors: D
authors: Seo
authors: Department of Civil Engineering, Chonnam National University, Gwangju 61186, Korea. ojh@jnu.ac.kr.
authors: Jaehong
authors: J
authors: Oh
authors: Department of Civil Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea. changno@seoultech.ac.kr.
authors: Changno
authors: C
authors: Lee
authors: Korea Aerospace Research Institute, Daejeon 34133, Korea. dhlee@kari.re.kr.
authors: Donghan
authors: D
authors: Lee
authors: Korea Aerospace Research Institute, Daejeon 34133, Korea. hjchoi@kari.re.kr.
authors: Haejin
authors: H
authors: Choi
keywords: AEISS-A; Kompsat-3A; calibration; validation