EROS CalVal Center of Excellence


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Color photo of Cody Anderson with graphic for USGS EROS podcast Eyes on Earth
July 27, 2020

Eyes on Earth Episode 32 - Lunar Calibration

Calibration teams at the USGS EROS Center use a variety of methods to make sure the data collected by Landsat satellites are an accurate representation of the Earth’s surface. They’re constantly comparing new imagery to old, tweaking algorithms to correct issues that might emerge, and using unchanging Earth surface sites and on-the-ground readings to check for consistency

Spatial Resolution Digital Imagery Guideline
June 18, 2020

Spatial Resolution Digital Imagery Guideline

This Spatial Resolution Digital Imagery Guideline was developed by Innovative and Imaging Research (I2R) for the USGS. This guide demonstrates how certain image specification parameters affect

June 16, 2020

Watering the Sahara

In a remote part of the Sahara Desert in Egypt, center pivot irrigation fields fill the landscape. Thanks to the Landsat archive, we can see how dramatically this area has changed over the last 35 years. But until the growth in irrigation, this part of the world hadn't changed much from a satellite's perspective. That's why Landsat calibration engineers originally chose it

Color photo of Jon Christopherson with USGS EROS "Eyes on Earth" graphic
August 31, 2019

Eyes on Earth Episode 4 - Cataloging Earth Observation Satellites

Earth observation used to be the province of a handful of countries with satellite technology. Today, hundreds of satellites built all over the world are launched every year. This episode of Eyes on Earth talks about the explosive growth in the civilian and commercial remote sensing and EROS’ role in it.

February 27, 2018

Landsat's Calibration and Validation

Engineers and scientists from both Landsat and Sentinel missions are working together to calibrate observation data and validate its quality to improve the science using these resources.

December 6, 2017

Every Pixel - Landsat's Sensors

On board Landsat 8 are two sensors that capture data about earth's surface. Here is an explanation of the instruments that capture every pixel.

December 6, 2017

Every Pixel - Processing Data

Once the ground stations receive data from Landsat, there's still a lot of processing to make every pixel usable. Here's an overview of some of that work.

GOES-16 and Landsat 8

These infrared satellite images were collected on May 24, 2019 over the Washington, D.C. area.

The larger image comes from the National Oceanic and Atmospheric Administration (NOAA) Geostationary Operational Environmental Satellite (GOES) 16, a geostationary spacecraft at 22,500 miles. The near infrared image has a resolution of 1 kilometer per pixel. The smaller