A Sounder gathers infrared energy emitted from Earth's surface to derive a vertical atmospheric profile (temperature, humidity, etc.)
Sounder
An official website of the United States governmentOfficial websites use .gov 
A .gov website belongs to an official government organization in the United States.
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..
A lock 🔒 or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites..