The panchromatic tri-stereo images of Gokturk-1, the first sub-meter optical remote sensing satellite of Turkiye, was assessed with respect to 3D georeferencing accuracy using sensor-dependent orientation model. The investigated panchromatic images were acquired in tri-stereo mode with 50 cm ground sampling distance at nadir-view, covering Zonguldak (Turkiye) test site. The sensor-dependent orientation model developed for the Pl & eacute;iades 1A/1B/Neo and SPOT 6/7 satellites were preferred since the characteristics of Gokturk-1's imaging geometry was identical with them. Two GCP/ICP sets (50/9 and 44/15) were established by in-field GNSS survey, and adjusted georeferencing accuracy were estimated almost millimetre and similar to +/- 50 cm (similar to +/- 1 GSD) at GCPs and ICPs, respectively. All process was carried out by Geo3o1 tool of GeoEtrim derived in MATLAB environment.