Survey Level 1 Requirements
| Category | Requirement | Performance | |
| Point Source Catalog | |||
| Photometric sensitivity | 10- at 15.8, 15.1, 14.3 mag at J, H, Ks respectively for |b|>10° |
met for full unconfused sky; exceeded for most of sky |
|
| Photometric uniformity | <4% maximum bias in photometric zeropoint around the sky | <2% achieved | |
| Photometric precision | <5% 1- for bright stars unsaturated in the 1.3 s exposure |
<3% achieved | |
| Astrometric accuracy | <0.5´´ 1- relative to the reference frame |
<0.1´´ achieved | |
| Completeness | >0.99 at 10- sensitivity limits |
met | |
| Reliability | >0.9995 | 0.9997 demonstrated in test areas;
no known source of unreliability in excess of specification |
|
| Bright star photometry (Read_1, rd_flg=1) |
<2% bias at Read_1 saturation limit (Ks~4.0 mag) <5% 1- repeatability at Read_1 faint limit (Ks~8.0 mag)<10% 1- repeatability at Read_1 saturation limit (Ks~4.0 mag) |
<4% at worst
2% achieved
2% achieved |
|
| Extended Source Catalog | |||
| Photometric sensitivity | 10- at J<15.0, H<14.2, Ks<13.5 mag |
met | |
| Photometric precision | <10% 1- repeatability for H<13.8 mag |
7-10% achieved | |
| Photometric uniformity | <10% maximum bias around sky | <4% achieved | |
| Completeness | >0.90 for |b|>30° | met | |
| Reliability | >0.80 for 10°<|b|<20° >0.99 for |b|>20° |
achieved 0.93-0.95 achieved 0.992-0.995 |
|
| General Survey | |||
| Sky coverage | >95% | 99.998% imaged; 99.5% coverage in point sources; 98% coverage in extended source |
|
| Other Information | |||
| Galactic Plane performance | No Requirements |
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