Traditional GNSS positioning systems utilize MEO constellation of satellites with composite ranging signals. However these systems have major drawbacks of high manufacturing cost, operational difficulties and lack of performance during all time usage. These drawbacks force to find alternative methods for improving positioning accuracy. In this paper, a regional positioning system and the satellite based augmentation system (SBAS) over Turksat GEO satellites are investigated. The proposed systems are operating over Ku-band DVB signals instead of traditional L-band ones. Systems are active for end users inside the communication satellite coverage areas.