Printer-friendly version

Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

U

UAS (Unmanned aerial system)

Refers to the components of a remotely piloted image acquisition system. This include the airborne platform, imaging sensor, airborne GPS and inertial measurement unit, and communication method and protocols such as broadband transmission of commands and data.

UAV (Unmanned aerial vehicle)

An airborne drone with sensor.

Urban heat island

A phenomenon characterized by increased temperature in urban areas in relation to the surrounding areas caused by an increase in impervious surfaces (e.g., pavement) that retain heat.