Table 1 IR1 camera specifications.

Observation wavelength:

   center 0.90 µm, width 0.01 µm for dayside

   center 0.90 µm, width 0.03 µm for nightside

   center 0.97 µm, width 0.04 µm for nightside

   center 1.01 µm, width 0.04 µm for nightside

Field of view: 12° × 12°

Pixel resolution: 0.012° × 0.012°

Noise level: 0.77 mW cm⁻² str⁻¹εm⁻¹ at 260 K (dayside)

1.3 εWcm⁻² str⁻¹εm⁻¹ at 260 K (nightside)

Detector: Si-CSD/CCD

Detector size: 18 mm × 18 mm

Pixel format: 1024 × 1024

Pixel size: 17 εm × 17 εm

Full well: 700000 e⁻

Dynamic range: 14 bits

Focal length: 84 mm

F number: 8

Exposure time: 3–30 sec

Weight: sensor 2.3 kg

electronics (common for two cameras) 3.7 kg

Size: sensor 51 cm × 28 cm × 21 cm

electronics (common for two cameras) 30 cm × 22 cm × 12 cm

Power: sensor 2.6 W (operation)

electronics (common for two cameras) 40.4 W (operation)