Category | Requirement | Performance | |
Point Source Catalog | |||
Photometric sensitivity | 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-![]() |
<3% achieved | |
Astrometric accuracy | <0.5´´ 1-![]() |
<0.1´´ achieved | |
Completeness | >0.99 at 10-![]() |
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- ![]() <10% 1- ![]() |
<4% at worst
2% achieved
2% achieved |
|
Extended Source Catalog | |||
Photometric sensitivity | 10-![]() |
met | |
Photometric precision | <10% 1-![]() |
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 |