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- Terra | The EOS Flagship
Update on Terra’s New Orbit: Since 2020, Terra has been drifting to an earlier equator crossing time, and in October 2022 was lowered by ~5km in altitude These changes in orbit did not reduce the data quality of Terra products, and only created minor changes to orbital repeat time and swath width (for some instruments)
- About Terra
Processed Terra data are available through several NASA data centers Current life expectancy: Terra has far exceeded its design life and has a strong chance of operating successfully into the early 2020s Terra began drifting in February of 2020 Read more about Terra’s drifting or see key dates below Key dates of Drift
- Terra Instruments
Terra collects data about the Earth’s bio-geochemical and energy systems using five sensors that observe the atmosphere, land surface, oceans, snow and ice, and energy budget Each sensor has unique features that enable scientists to meet a wide range of science objectives The five Terra onboard
- ASTER | Terra
Unlike the other instruments aboard Terra, ASTER will not collect data continuously; rather, it collects an average of 8 minutes of data per orbit All three ASTER telescopes (VNIR, SWIR, and TIR) are pointable in the crosstrack direction
- MODIS - Terra
With its sweeping 2,330-km-wide viewing swath, MODIS sees every point on our world every 1-2 days in 36 discrete spectral bands Consequently, MODIS tracks a wider array of the earth’s vital signs than any other Terra sensor For instance, the sensor measures the percent of the planet’s surface that is covered by clouds almost every day
- Atmosphere - Terra
Terra and Atmospheric Composition Terra is the first satellite to provide integrated measurements of the processes connecting the atmosphere to emissions from activity on the ground For example, Terra instruments measure both fires and smoke In particular, Terra instruments measure aerosols (particles in the atmosphere) and carbon monoxide
- MISR - Terra
Most satellite instruments look only straight down, or toward the edge of the planet To fully understand Earth’s climate, and to determine how it may be changing, we need to know the amount of sunlight that is scattered in different directions under natural conditions
- Earth Observatory - Terra
Recent Terra imagery captured off the coast of Chile highlight the intricate structures of these clouds March 2023 : “ A Surge of Floodwater for Owens Lake “ In March 2023, California’s historically dry Owens Lake experienced an unprecedented rainfall event that led to the collapse of three sections of the Los Angeles Aqueduct, causing
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