What kind of atmospheric window is 0.64?

Near ultraviolet, visible light and near infrared bands.

The spectral bands of atmospheric window mainly include: microwave band (0.3 ~10 GHz/0.03 ~1m), thermal infrared band (8~ 14um), mid-infrared band (3.5~5.5um), near ultraviolet band, visible band and near infrared band (0.5 um).

0.3 ~ 1. 155μ m, including part of ultraviolet light, all visible light and part of near infrared, that is, ultraviolet, visible light and near infrared bands. This band is the best band for photographic imaging, and it is also a common band for scanning imaging of many satellite remote sensors. For example, Landsat TM band1~ 4; HRV band of SPOT satellite, etc. Among them: 0.3 ~ 0.4 micron, and the transmittance is about 70%; 0.4~0.7μm, and the transmittance is more than 95%; 0.7~ 1. 1μm, and the transmittance is about 80%.