Geometric Camera Calibration of BiLSAT Small Satellite Preliminary Results

Friedrich, Jurgen
Leloğlu, Uğur Murat
Tunalı, Erol
The interior geometric calibration of the multi-spectral camera of BiLSAT satellite is aimed using three sets of images from Ankara. Each set contains four different images for channels Red, Green, Blue (RGB), and Near Infra Red (NIR) in which well-defined target points were identified and their image coordinates measured. The target points’ UTM coordinates were extracted from aerial photos or topographic maps and collected from field using hand-held GPS receiver. A least square parameter estimation was then applied to fit the image coordinates to the UTM coordinates and heights from the SRTM 90 m elevation model, thereby computing best estimates for the camera position and orientation as well as all the required geometric camera calibration parameters. These parameters were then analyzed and compared to each other. The obtained results show that the focal length f has a value of about f = 179 mm. Further, the principal point coordinates and radial lens distortions have a maximum of about ten pixels.
Citation Formats
J. Friedrich, U. M. Leloğlu, and E. Tunalı, “Geometric Camera Calibration of BiLSAT Small Satellite Preliminary Results,” 2006, Accessed: 00, 2021. [Online]. Available: