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This page provides the atmospheric transmittance expected at the TAO site. All data were calculated by the ATRAN model (Lord, S. D., 1992, NASA Technical Memorandum 103957) running on a NASA website. At the TAO site, precipitable water vapor (PWV) is expected to be 0.3 to 1.5 mm, and atmospheric transmission curves toward the zenith for PWVs of 0.3, 0.5, 0.7, 0.9, 1.2 and 1.5 mm are shown below.
 |  |
| Near-infrared atmospheric transmittance smoothed with a Gaussian function with an FWHM of 0.002 um-1. | Atmospheric transmittance around 2.7 um smoothed with a Gaussian function with an FWHM of 0.00056 um-1. |
| PWV (mm) | Resolution | ||
| No Smoothing | 0.00056 um-1 | 0.002 um-1 | |
| 0.3 |  data | data | data |
| 0.5 | data | data | data |
| 0.7 | data | data | data |
| 0.9 | data | data | data |
| 1.2 | data | data | data |
| 1.5 | data | data | data |
 |
| N-band atmospheric transmittance smoothed with a Gaussian function with an FWHM of 0.0005 um-1. |
| PWV (mm) | Resolution | |
| No Smoothing | 0.0005 um-1 | |
| 0.3 | data | data |
| 0.5 | data | data |
| 0.7 | data | data |
| 0.9 | data | data |
| 1.2 | data | data |
| 1.5 | data | data |
 |
| Q-band atmospheric transmittance smoothed with a Gaussian function with an FWHM of 0.0005 um-1. |
| PWV (mm) | Resolution | |
| No Smoothing | 0.0005 um-1 | |
| 0.3 | data | data |
| 0.5 | data | data |
| 0.7 | data | data |
| 0.9 | data | data |
| 1.2 | data | data |
| 1.5 | data | data |
 |
| Atmospheric transmittance at the 30-um band. |
