An official website of the United States government. Here's how you knowHere's how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Latest Earthquake | Chat Share
USGS Landsat Project Scientist and Landsat Science Team Co-Chair Chris Crawford uses optical ground-based remote sensing to measure incident solar irradiance, snow reflectivity, and snow physical properties during Landsat's mid-morning overpass time at Sturgeon Lakes, MN.