From: Ultraviolet imager on Venus orbiter Akatsuki and its initial results
Observation target | Solar radiation scattered at cloud top |
Optics design | Camera with off-axial catadioptric optics |
Observational wavelength | 283 and 365Â nm |
Field-of-view | 12° |
FOV per pixel | 0.20Â mrads |
Spatial resolution | ~ 200 m (periapsis)–76 km (60Rv) |
Optics | |
F-number | 16 |
Focal length | 63.3Â mm |
Aperture size | 39.89Â mm (hood entrance) |
Bandpass widths of the filters | 14Â nm |
Detector | |
CCD | SiCCD (back-illuminated and full-frame transfer) |
Pixel number | 1024 × 1024 pixels |
CCD control | |
Exposure time | 4 ms–11 s |
Data depth | 12Â bit |
Weight (kg) | |
UVI-S | 2.9 |
UVI-AE | 1.2 |
Size | |
UVI-S | 199 mm × 206 mm × 376 mm |
UVI-AE | 220 mm × 220 mm × 50 mm |
Power (W) | |
Stand-by mode | 17 |
FW movement mode | 34 |
Observation mode | 19 |