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Available filters are shown in the table below.
| Name | Center wavelength (um) | Band width (FWHM; um) | Note |
| 32um | 31.76 | 2.38 | |
| 37um | 37.43 | 2.96 |
Saturation limits are calculated as shown in the Table below. The limits are highly dependent on PWV. However, since the atmospheric transmittance is not good, the limits are very high, and we do not need to care about saturation basically.
| Name | Saturation limit |
| 32um | >28 kJy |
| 37um | >100 kJy |
Noise-equivalent flux density for one exposure is calculated as shown in the figures below. Corresponding 1-sigma 1-sec sensitivity is also plotted. This calculation assumes aperture photometry with an aperture diameter of 2.5 times the FWHM of the PSF in the medium seeing condition (see here). Since the background emission is high, the noise is limited by the photon noise of the background emission, and the sensitivity is almost independent of exposure time. On the other hand, it is significantly affected by PWV, because the atmospheric transmittance highly varies with PWV. The truncation in the right edge of each band shows the longest exposure time. For achieving the shortest exposure shown in the figure below, partial readout is needed.
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| Noise equivalent flux density for one exposure in the N band. Corresponding 1-sigma 1-sec sensitivity is shown by dotted lines. Multiple lines for each filter set show different PWV conditions (from bottom to top, 0.3, 0.5, 0.7, 0.9, 1.2, and 1.5 mm). |
sensitivity_dia_30um.jpg