TV System for Navigation and Observation (ТSNN)
TV System for Navigation and Observation (TSNN) has been designed for solving navigation and scientific tasks of the Phobos-Grunt mission.TSNN consists of four TV four CCD-based TV cameras – two wide-angle (ShTK) and two narrow-angle (UTK) – mounted in pairs on the flight module on the opposite sides of the load-bearing frame. Thus, the stereoimaging base of two meters is provided.
Main characteristics of the TSNN TV cameras
| Parameter | UTK | ShTK |
| Aperture | 1:7 | 1:2 |
| Focal length, mm | 500 | 18 |
| Photoreceivers | CCD matrix | |
| Number of active pixels | 1000 x 1000 | |
| Pixel size, mkm | 7.4х7.4 | |
| Resolution, arcsec | 3.04 | 84.8 |
| Field of view, grad | 0.85 | 23.3 |
| Radiometric resolution, bit | 10 | |
| Mass, kg | 2.7 | 1.7 |
| Power consumption, W | 8 | |
