GOES stands for Geostationary Operational Environmental Satellite. The GOES system, managed by NOAA’s National Environmental Satellite, Data and Information Service division, supports weather forecasting and severe storm tracking for North America. It also provides a wealth of scientific data for weather research and meteorology studies.
Unlike most weather satellites, which orbit the Earth at fixed altitudes and only scan the surface at intervals, the geostationary GOES satellites are positioned 35,790 kilometers (22,240 miles) above the planet’s surface in geosynchronous orbit, continuously viewing a specific region of the United States and its surrounding oceans. Two GOES satellites, called GOES East and GOES West, provide coverage for the eastern half of the country; one GOES-T is positioned to monitor Alaska and Hawaii as well as a large section of the Pacific Ocean.
Each GOES satellite is equipped with multiple instruments that are grouped into two suites: the Imager and the Sounder. The Imager captures visible and infrared light from Earth’s surface, clouds, and atmosphere to create imagery and maps of weather phenomena and the environment. The Sounder measures vertical atmospheric temperature and moisture profiles, as well as surface and cloud top temperature and ozone distribution.
Both GOES and the Sounder feature an advanced technology that allows them to track the evolution of severe weather events such as tornadoes, hurricanes, and cold fronts. The imager’s high temporal cadence of 10 minutes and the Sounder’s rapid response time enable NOAA National Weather Service meteorologists to better track these events as they unfold.
GOES-R is the latest in NOAA’s series of geostationary weather satellites and features improved performance over previous generations. The GOES-R Series is a collaborative NOAA and NASA project with NOAA managing the satellites and their operations, NASA overseeing the acquisition of the spacecraft and instruments, and managing the launch service through the agency’s Launch Services Program based at the Kennedy Space Center in Florida.
Lockheed Martin is developing the GOES-R Series satellites for NOAA with the help of partners and subcontractors from across the country. The GOES-R-1 satellite will be armed with a range of new instruments, including the Enhanced Visible and Infrared Imager (EVI) with three times more spectral channels, four times greater resolution and five times faster scanning than its predecessors, as well as the Advanced Baseline Imager (ABI) and Extreme Ultraviolet and X-ray Irradiance Sensors (EXIS). GOES-R-2 will premier the Naval Research Laboratory’s Compact Coronagraph-1.
The GOES-T satellite is currently undergoing thermal vacuum testing in a 29’ x 65’ chamber to simulate the extreme temperatures and conditions it will experience during its journey to space. In addition, the spacecraft recently completed a reverberant acoustics test and sine vibration test, designed to expose it to the sound and vibrations it will experience during a launch on a United Launch Alliance Atlas V 541 rocket in 2024.