Open Access
Table 1.
Summary of main payload characteristics.
| Description | Value |
|---|---|
| Optics | (24+2) telescopes with |
| axisymmetric dioptric design | |
| TOU spectral range | 500−1000 nm |
| Pupil diameter | 12 cm |
| (per telescope) | |
| Detector | Back-illuminated |
| Teledyne-e2v CCD 270 | |
| N-CAM focal plane | 4 full-frame CCDs |
| (4510 × 4510 pixels each) | |
| F-CAM focal plane | 4 frame-transfer CCDs |
| (4510 × 2255 pixels each) | |
| Pixel length | 18 μm |
| On-axis plate scale | 15 arcsec |
| (pixel field of view) | |
| Quantization noise | ∼7.2 e− rms px−1 |
| Readout noise (CCD+FEE) | ∼50.2 e− rms px−1 |
| at beginning of life | |
| Detector smearing noise | ∼45 e− px−1 s−1 |
| Detector dark current noise | ∼4.5 e− px−1 s−1 |
| N-CAM cadence | 25 s |
| N-CAM exposure time | 21 s |
| N-CAM readout time | 4 s |
| F-CAM cadence | 2.5 s |
| N-CAM field of view | ∼1037 deg2 (circular) |
| F-CAM field of view | ∼619 deg2 |
| Full field of view | ∼2132 deg2 |
| Fractional field of view | 294 deg2 (24 telescopes) |
| 171 deg2 (18 telescopes) | |
| 796 deg2 (12 telescopes) | |
| 871 deg2 (6 telescopes) |
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