A221-0001
An Overview of the First Half of the OCO-3 Mission

Wednesday, 16 December 2020
Poster
Annmarie Eldering1, Christopher O'Dell2, Peter Somkuti3, Thomas Taylor1, Matthäus Kiel4, Robert R Nelson1, Gary D Spiers5, Brenden Fisher1, Ryan Pavlick6, Thomas P Kurosu5, Gregory B Osterman1, Joshua Laughner7, Robert Rosenberg5, Graziela R. Keller-Rodrigues8, Shanshan Yu9, Yuliya Marchetti1, David Crisp6 and Paul Wennberg4, (1)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (2)Colorado State University, Fort Collins, CO, United States, (3)Cooperative Institute for Research in the Atmosphere, Fort Collins, CO, United States, (4)California Institute of Technology, Pasadena, CA, United States, (5)Jet Propulsion Laboratory, Pasadena, CA, United States, (6)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (7)University of California Berkeley, Berkeley, CA, United States, (8)Jet Propulsion Laboratory, Pasadena, United States, (9)NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Abstract:
The Orbiting Carbon Observatory 3 (OCO-3) was installed on the International Space Station (ISS) in May 2019 to continue global CO2 and solar-induced chlorophyll fluorescence (SIF) observations using the flight spare instrument from OCO-2. We have completed early validation and released the first version of the data, called vEarly.

In this talk, I will present the overall data characteristics – sampling, signal to noise, data coverage, and early validation results. I will also highlight some of the data collection from our new Snapshot Area Map (SAM) mode, where 80km by 80km areas are sampled with 2km by 2km footprints in 2 minutes. This is a new observation mode made possible by the agile pointing mirror assembly of OCO-3. Data has been collected over hundreds of cities, over areas of interest to the terrestrial carbon community, and in coordination with field campaigns.

The cross comparison of OCO-3 and OCO-2 data, for radiances, XCO2, and SIF is underway to gain insights into data quality and to create and OCO-3 dataset that can be used seamlessly with OCO-2 measurements. We will discuss these inter-comparisons, highlighting a few examples, such as the OCO-2 and OCO-3 target and SAM measurements in Los Angeles that were collected on the same day. The value of the OCO-3 dataset for characterization of diurnal patterns will also be shared.

Finally, looking forward, I will also discuss the mission status, including the expectations for the remaining mission life, calibration updates, and algorithm updates. This work supports our focused on developing an improved data version to be released early in 2021.

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