Three-dimensional Earth Modelling Performance Analysis of Gokturk-2 Satellite

Özet

Following RASAT, Göktürk-2, placed into its orbit as Turkey’s second domestic production of earth observation, has three times higher spatial resolution (2.5 m) than RASAT and has much more advanced stereo vision capability. However, like all-optical imaging satellites, Göktürk-2 has problems in data quality due to reasons such as sensor geometry, contrast, dense forest cover in the field of view and topographic slope. In this study, it is aimed to evaluate the horizontal and vertical geolocation accuracy performance of three-dimensional Digital Surface Models (DSM) derived from Göktürk-2 stereo images in comparison with a reference DSM obtained by traditional photogrammetry method in Derik district of Mardin province with high slope and variable topographic conditions. The results demonstrated that the three dimensional topographic representation capability of Göktürk-2 is quite successful despite offering a medium spatial resolution. The Göktürk-2 DSM has an absolute horizontal geolocation accuracy of ≤0.1 pixels (25 cm) both for X and Y directions. On the height, it provides accuracy as standard deviation of 7.3 m and normalized median absolute deviation of about 5.7 m.

Anahtar kelimeler

Atıf

@article{threedimensionalearthmodelling2020,
  title = {{Three-dimensional Earth Modelling Performance Analysis of Gokturk-2 Satellite}},
  author = {Marangoz, Aycan Murat and Sefercik, Umut Gunes},
  year = {2020},
  journal = {{Turkish Journal of Engineering}},
  volume = {4},
  number = {3},
  pages = {164 - 168},
  doi = {10.31127/tuje.650989}
}

TY  - JOUR
AU  - Marangoz, Aycan Murat
AU  - Sefercik, Umut Gunes
TI  - Three-dimensional Earth Modelling Performance Analysis of Gokturk-2 Satellite
PY  - 2020
JO  - Turkish Journal of Engineering
VL  - 4
IS  - 3
SP  - 164 
EP  -  168
DO  - 10.31127/tuje.650989
ER  - 

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