StarGazer






A star tracker is a celestial reference device that recognizes star patterns, such as constellations, and detects the orientation of the spacecraft very accurately.

We have developed a fully autonomous Lost-In-Space Star tracker algorithm in collaboration with TUBITAK UZAY Space Technologies Research Institute.

Aurvis is consulting on the software part of the tracker and develops a prototype for the detection and tracking of the stars together with with TUBITAK UZAY.










Image courtesy of NASA Earth Observatory
StarGazer






A star tracker is a celestial reference device that recognizes star patterns, such as constellations, and detects the orientation of the spacecraft very accurately.

We have developed a fully autonomous Lost-In-Space Star tracker algorithm in collaboration with TUBITAK UZAY Space Technologies Research Institute.

Aurvis is consulting on the software part of the tracker and develops a prototype for the detection and tracking of the stars together with with TUBITAK UZAY.








Image courtesy of NASA Earth Observatory
StarGazer



A star tracker is a celestial reference device that recognizes star patterns, such as constellations, and detects the orientation of the spacecraft very accurately.

We have developed a fully autonomous Lost-In-Space Star tracker algorithm in collaboration with TUBITAK UZAY Space Technologies Research Institute.

Aurvis is consulting on the software part of the tracker and develops a prototype for the detection and tracking of the stars together with with TUBITAK UZAY.



StarGazer



A star tracker is a celestial reference device that recognizes star patterns, such as constellations, and detects the orientation of the spacecraft very accurately.

We have developed a fully autonomous Lost-In-Space Star tracker algorithm in collaboration with TUBITAK UZAY Space Technologies Research Institute.

Aurvis is consulting on the software part of the tracker and develops a prototype for the detection and tracking of the stars together with with TUBITAK UZAY.





Star Identification


The initial results of our LIS star identification method: We autonomously detect which stars are visible in a given astronomical image and then estimate the orientation of the image with respect to the Earth centered reference frame (ERF). The developed algorithm is robust to centroiding errors, false star detections due to proton like particle impacts during Solar flares and failure to detect actual stars. In the below video, the left image shows a simulated frame with false stars (red dots) and the identifying constellation that is detected (yellow quadrangle). The celestial sphere, the true orbit of the satellite (blue line) and the detected sat position (green cross) together with the boresight and cross-boresight errors of the algorithm are also shown. Related research is published in:

[1] Effects of Star Extraction Artifacts on Blind Attitude Determination, Engin Tola, Medeni Soysal To appear in International Conference on Image Processing, October 2014
[2] Yıldız Çıkarma Hatalarının Uydu Yönelimi Bulma Başarımı Üzerindeki Etkileri (Effects of Star Detection Errors on Attitude Determination Performance), Medeni Soysal, Engin Tola. In Turkish, IEEE Sinyal İşleme ve İletişim Uygulamaları, 2014