
Julia Barsi
Research Physicist and lead of NASA Goddard's Code 618 Calibration Laboratories, specializing in radiometric calibration of Earth observation satellite instruments including Landsat.
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Jun 26, 2026
Calibrating Satellite Image Data
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Julia BarsiGUEST
I run a collection of laboratories that do radiometric calibration and characterization and reflectance characterization of materials for various types of instruments.

Julia BarsiGUEST
So calibration and characterization are the processes that allow us to understand the properties and performance of an instrument so that we can interpret those results for scientific application.

Julia BarsiGUEST
There's many types of calibration and characterization that go into the process of building an instrument.

Julia BarsiGUEST
But in my labs, we do radiometric and spectral calibration and characterization.

Julia BarsiGUEST
The radiometric calibration establishes the relationship between the sensor response and a physical parameter, in this case, radiance, or the amount of energy that is hitting that instrument.
14 MINS LATER
