| Level 1 Requirement | Achieved | |
| Sky Coverage (VI.2) | ≥4 independent exposures in each filter on at least 95% of the sky | ≥4 coverages on >99% of the sky, all bands. 95% of sky has 10.0/9.9/9.0/9.4 coverages in W1/W2/W3/W4 (Preliminary Data Release covers 57% of the sky) |
| Photometric Sensitivity (VI.4.a) | SNR=5 at 0.12/0.16/0.85/4.0 mJy (16.0/15.1/11.3/8.3 Vega mag) at W1/W2/W3/W4 in unconfused regions with 8 coverages | 0.05/0.10/0.73/5.9 mJy (17.0/15.6/11.5/7.9 Vega mag) based on comparison with external measurements |
| Photometric Accuracy (VI.4.b) | RMS error in relative accuracy <7% accuracy for SNR>100 | RMS = 0.02 mag (W1/W2/W3) and 0.03 mag (W4) |
| Astrometric Accuracy (VI.5) | RMS position error with respect to the 2MASS PSC <0.5" for SNR>20 in at least one band | RA and Dec RMS~0.2" for W1<13.0 mag. Increasing fraction of fainter sources exhibit a systematic declination bias of 0.2-1.0". Approx. 20% of sources with W1<14.5 mag are affected. |
| Catalog Completeness (VI.6) | >95% for SNR>20 in unconfused regions | > 95% for sources with W1<16.6, W2<16.0, W3<10.8, W4<6.7 Vega mag in unconfused regions with ≥12 frame depth-of-coverage |
| Catalog Reliability (VI.7) | >99.9% for SNR>20 in unconfused regions | > 99.9% for sources with W1<15.6, W2<14.3, W3<10.2, W4<6.5 mag in unconfused regions with ≥12 frame depth-of-coverage. |
Last update: 2011 April 13