// ORBITAL LOGISTICS AND PROPULSION TERM
Albedo
A measure of how much light a surface reflects. A high albedo means it reflects a lot of light, like snow, while a low albedo means it absorbs more, like asphalt.
TECHNICAL DEFINITION
Albedo is the fraction of incident electromagnetic radiation (typically sunlight) reflected by a surface or object, ranging from 0 (perfect absorber) to 1 (perfect reflector), influencing planetary temperatures and climate dynamics.
BACKGROUND
In spacecraft design, the function of the thermal control system (TCS) is to keep all the spacecraft's component systems within acceptable temperature ranges during all mission phases. It must cope with the external environment, which can vary in a wide range as the spacecraft is exposed to the extreme coldness found in the shadows of deep space or to the intense heat found in the unfiltered direct sunlight of outer space. A TCS must also moderate the internal heat generated by the operation of the spacecraft it serves.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Reflectivity
- reflection coefficient
- brightness
USAGE NOTE
Planetary albedo is a key factor in climate modeling and understanding surface properties from remote sensing.
DEVELOPERS
Organizations developing technology related to Albedo.
A company developing a constellation of satellites to provide very high-resolution (VHR) optical and thermal imagery. Their thermal data is directly related to surface emissivity and temperature, key components in understanding and calculating the albedo of specific materials and locations on Earth.
NASA's Earth Science division operates numerous missions, such as the Terra and Aqua satellites with the MODIS instrument, which are fundamental for long-term monitoring of Earth's albedo. This data is critical for climate change models and understanding the planet's energy balance.
Manages the Copernicus Programme, whose Sentinel satellites provide continuous Earth observation data. Products derived from missions like Sentinel-2 and Sentinel-3 are used to calculate surface albedo, tracking changes in ice cover, vegetation, and land use across Europe and the globe.
Operates the largest constellation of Earth-imaging satellites, providing daily, global coverage. Their vast dataset of optical imagery enables the derivation of albedo at high frequency, allowing for the monitoring of rapid changes in surface reflectivity due to factors like snowfall, deforestation, or agricultural cycles.
This U.S. agency operates geostationary (GOES) and polar-orbiting (JPSS) environmental satellites. These systems continuously measure Earth's radiation budget, with albedo being a key product used for weather forecasting, climate monitoring, and detecting changes in snow and ice cover.
Provides high-resolution satellite imagery and geospatial data. While not a direct albedo product, their data is used by scientists and analysts to classify land cover and surface materials with high precision, which is essential for creating detailed albedo maps for urban planning, environmental studies, and climate modeling.
The European Organisation for the Exploitation of Meteorological Satellites. EUMETSAT operates satellite systems like Meteosat and MetOp that provide crucial data for weather and climate. Albedo is a standard data product derived from their instruments, supporting climate services and numerical weather prediction in Europe.
An aerospace company that designs and builds advanced sensors and spacecraft. They developed critical instruments like the VIIRS (Visible Infrared Imaging Radiometer Suite) used on NOAA's JPSS satellites, which directly measures surface properties needed to calculate albedo.