Table 3.
Minimum, average, maximum and standard deviation of dark frame sensor DN for each of the three cameras. Average DN of hematite spectral return between 600 and 650, 650 and 700, 700 and 750, and 750 and 800 nm is also shown.
| Raspberry Pi Mk 1 Camera | |||
| DN (Minimum) | DN (Average) | DN (Maximum) | DN (Std Deviation) |
| 0 | 0.86 | 2.8 | 0.56 |
| Hematite (DN, average 600–650 nm) | Hematite (DN, average 650–700 nm) | Hematite (DN, average 700–750 nm) | Hematite (DN, average 750–800 nm) |
| 35 | 27 | 19 | 17 |
| Raspberry Pi Mk 2 Camera | |||
| DN (minimum) | DN (Average) | DN (Maximum) | DN (Std Deviation) |
| 0 | 0.28 | 1.8 | 1.38 |
| Hematite (DN, average 600–650 nm) | Hematite (DN, average 650–700 nm) | Hematite (DN, average 700–750 nm) | Hematite (DN, average 750–800 nm) |
| 40 | 27 | 19 | 14 |
| ZWO Mini Camera | |||
| DN (minimum) | DN (Average) | DN (Maximum) | DN (Std Deviation) |
| 0 | 0.73 | 1.8 | 0.24 |
| Hematite (DN, average 600–650 nm) | Hematite (DN, average 650–700 nm) | Hematite (DN, average 700–750 nm) | Hematite (DN, average 750–800 nm) |
| 46 | 41 | 34 | 26 |