BILSAT-1 (formerly just BILSAT) was an Earth observation satellite designed and developed by TÜBİTAK Space Technologies Research Institute (TÜBİTAK UZAY) and produced in Turkey as part of the Disaster Monitoring Constellation (DMC) project in the context of a show-how program led by DMC International Imaging of Surrey Satellite Technology (SSTL).

[2][4][5][7] One of the four spacecraft of the DMC project, which is an organization for international space program cooperation formed by seven countries, namely United Kingdom, Algeria, China, Nigeria, Thailand, Vietnam and Turkey, BILSAT-1 was dedicated to studies on agriculture, forestry, hydrology, land cover/use and mapping, environment as well as urban area development.

[6][11] Turkey's first indigenously developed scientific microsatellite for remote sensing, BILSAT-1 was based on an enhanced SSTL-100 satellite bus.

The 130 kg (290 lb) satellite features a multi-spectral instrument called ÇOBAN, which is a low-resolution 8-channel camera.

[4][6][7][12] BILSAT-1 hosted a real time image compression module named GEZGIN, an abbreviation for "GErçek Zamanda Görüntü İşleyeN", which is a digital signal processor using JPEG 2000 algorithm to compress images taken by the satellite.