Earth Observing System vs Landsat Program
As technological advancements keep soaring high, so do our yearnings for a better understanding of life on earth. With space technology, we can now get an enhanced view of our planet as well as other celestial bodies. Two of the most popular satellite imaging technologies available today are Earth Observing System (EOS) and Landsat Program.
What is Earth Observing System (EOS)?
Earth Observing System is a series of satellites and imaging sensors that take measurements of the Earth's atmosphere, land, and oceans from space. Launched in July 1991, EOS provides high-quality data on the Earth's climate, ecology, and geography.
Some of the sensors used by the EOS include the Moderate Resolution Imaging Spectroradiometer (MODIS) and the Ozone Monitoring Instrument (OMI). MODIS, for instance, captures data in 36 spectral bands and has the ability to map out geographical, oceanic, and atmospheric features in detail.
What is Landsat Program?
The Landsat Program, on the other hand, is a series of Earth-observing satellite missions that started in 1972. The program was initiated as a joint venture by NASA and the U.S. Geologic Survey (USGS). The sensors on Landsat satellites observe and capture images of the Earth's landmass, helping to monitor seasonal changes, track urban growth, and manage resources.
Landsat Program uses the Thematic Mapper (TM) and the Operational Land Imager (OLI) sensors, which capture imagery and data across specific regions of the electromagnetic spectrum.
A Comparison between Earth Observing System and Landsat Program
Both EOS and Landsat Program provide valuable data insights on various aspects of the Earth's natural systems. However, they differ in several ways:
Spatial and Spectral Resolution
EOS has bigger spectral and spatial resolutions compared to Landsat, making it the best choice for applications that need higher resolutions.
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EOS MODIS sensor has a spectral resolution of up to 36 bands
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EOS LandSat 7 ETM+ sensor has spatial resolution ranging between 15 and 60 meters.
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Landsat 8 OLI has a maximum of 11 spectral bands
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Landsat 8 OLI has spatial resolution ranging between 30 and 100 meters.
Data Delivery
EOS has a higher frequency of data updates, thanks to its imaging algorithms and sensor orientation. The EOS also provides data that spans a longer time period compared to other platforms.
Data Availability
Landsat Program data is readily available for free, whereas gaining access to EOS data may incur a user fee.
Conclusion
EOS and Landsat Program are both exceptional satellites designed for improved observations of the Earth's environment. They both have their unique strengths and differences, which make them suitable for different applications. Nevertheless, users must assess their research goals and technical requirements before deciding which satellite technology is best suited for their needs.
References
- NASA Earth Observing System. (n.d.). Earth Observing System. https://eospso.nasa.gov/
- USGS. (n.d.). Landsat 8 - OLI & TIRS. U.S. Geological Survey. https://www.usgs.gov/land-resources/nli/landsat/landsat-8-oli-tirs-resources.