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Modis

All articles tagged with #modis

earth-science3 hours ago•4 min saved

Victoria’s Valley Fog and Arch Cloud Captured by NASA

NASA’s Earth Observatory highlights autumn fog in eastern Victoria as the Terra satellite’s MODIS instrument captures morning valley fog in the Victorian Alps and an arch-shaped cloud drifting over Port Phillip Bay. The piece explains radiation fog forms when air cools to the dew point in calm conditions, sinks into valleys, and lingers where terrain shades the ground; nearby breezes interacting with the bay’s terrain likely shaped the arch cloud, which moved south as the fog faded.

via NASA Science (.gov)|

#earth-observation #earth-science #fog

science2 years ago•3 min saved

Decoding Sunglint: Understanding its Nuances.

Sunglint is an optical phenomenon that occurs when sunlight reflects off the surface of the water at the same angle that a satellite sensor views it. It can create distinctive patterns within the bright, silvery appearance of much of the water. The roughness of the water surface can influence how sunglint areas appear in MODIS images. While sunglint often produces visually stunning images that are useful for inferring winds and detecting oil spills, the phenomenon can also create problems for remote sensing scientists because it can obscure features of interest.

via nasa.gov|

#modis #oceanography #phytoplankton