Welcome to CLARREO Pathfinder
Advancing Earth Science Through Unprecedented Accuracy
CLARREO Pathfinder’s data will help us better understand the Earth’s changing system. CLARREO Pathfinder (CPF) data will do this by taking highly accurate measurements of sunlight reflected by Earth and the Moon. These measurements, which will be anchored to international standards, will be five to ten times more accurate than those from existing sensors. CPF will have the unique ability to maintain its high accuracy throughout its lifetime. CPF will also showcase novel techniques in transferring its high accuracy to other sensors monitoring Earth. Higher accuracy means greater certainty in our measurements, which makes it possible to detect changes in Earth’s system decades sooner than otherwise possible.
Earth is complex and dynamic.
CPF will take high accuracy measurements of reflected sunlight needed to help us better understand Earth’s system.
The spectral content of reflected sunlight carries information back to space.
CPF measurements contain a wealth of information about a wide array of several vital atmospheric and surface variables. This information is essential to understand the “why” behind the Earth system’s variability.
CPF will measure reflected sunlight better than current Earth-viewing sensors.
CPF will use scans of the Sun and other detailed calibration measurements to achieve unprecedented accuracy that will be 5-10 times better than existing sensors.
There is a suite of Earth-observing instruments needed to collectively provide a comprehensive perspective of Earth from space.
Other instruments need a high accuracy reference to collectively provide more accurate and consistent measurements of Earth. CPF will demonstrate how to transfer its high accuracy, which will be tied to international standards, to other Earth-viewing sensors, increasing the value of existing satellite assets.
CPF will improve the Moon as a calibration standard.
CPF’s measurements will improve the calibration accuracy of the Moon, a stable calibration target, which will also help other past, present, and future instruments.
WHY DO WE NEED CPF?
NASA innovates for the benefit of humanity.
Earth is changing. What remains a mystery is how quickly, to what extent, and the exact nature of the consequences. CPF’s unparalleled measurement accuracy and novel analysis techniques are critical for detecting changes in Earth’s system decades sooner than otherwise possible. CPF will help to improve life on Earth through its innovative technology and high accuracy measurements.
01
EARTH
Measuring sunlight reflected by Earth helps us learn about the Earth system. CPF will be the first step in achieving unprecedented measurements at sufficiently high accuracy to be sensitive to Earth’s system variability.
02
OTHER SATELLITES
CPF’s high accuracy means that it can serve as an on-orbit reference for other satellite instruments. CPF will demonstrate the capability to transfer its unparalleled high accuracy to other Earth-viewing satellites using a novel inter-calibration technique. This improves accuracy and consistency among satellite measurements.
03
THE MOON
The surface of the Moon is a highly stable reference that researchers use to track satellite sensor performance throughout the sensor’s lifetime. This is done by measuring the amount of sunlight that reflects off the Moon. Having highly accurate measurements of the Moon from space that are tied to international standards, improves this key calibration standard for a large number of Earth-monitoring instruments.
04
CLIMATE DATA RECORDS
A climate record is a series of data points that tell us about climate variability over time. Currently, we obtain these records using measurements from different instruments that overlap in time to provide a continuous long-term data record. Relying on overlapping measurements, however, means that gaps in the continuous record limit our understanding of climate variability. The high accuracy attained by CPF reduces the susceptibility to gaps in measurements.
05
SOCIETAL BENEFITS
A clearer understanding of the Earth system’s variability provides policymakers with the information needed to more effectively decide how to respond to extreme natural disasters such as rising sea levels, a concern that impacts the U.S. military and coastal communities. CPF advances our understanding to begin solving this mystery decades sooner than we can currently.