The primary purpose of the retrieval algorithm is to derive estimates of the column averaged atmospheric CO^sup 2^ dry air mole fraction, XCO^sup 2^, and other Level 2 data products from the spectra returned by the OCO-2 mission.Anonymous...
Preliminary analysis of target mode retrievals using the operational algorithm show biases that appear to be due to not accounting for bidirectional surface reflection (BRDF) effects, i.e., the non-isotropic nature of surface reflection. To address this issue, we implement a realistic BRDF model....
Applications of SIF, CO2, and emissions and flux products Retrieval algorithm advancement Spectroscopy advancement Calibration and validation Uncertainty quantification Other OCO-2/3 related studies This Special Issue aims to not only revisit past advancements and the wisdoms but also to serve as a ...
Figure1cshows the national NEE estimates and their uncertainties under different observational constraints. When both GOSAT and OCO-2 observations are used for inversion, the NEE estimates in most countries fall between those obtained using GOSAT or OCO-2 alone. For example, in the US, the NEE ...
Evaluating the consistency between OCO-2 and OCO-3 XCO2 estimates derived from the NASA ACOS version 10 retrieval algorithm 2023, Atmospheric Measurement Techniques Deriving Full-Coverage and Fine-Scale XCO<inf>2</inf> Across China Based on OCO-2 Satellite Retrievals and CarbonTracker Output 2022...
In this study, we perform new tests of the L2 algorithm using simulated OCO-2 observations from a 3-D radiative transfer model, SHDOM. We focus on an idealized scene containing a single, spatially unresolved boundary layer cloud. These synthetic observations are processed with the L2 ...
Recent updates to the 1.6m and 2.06m CO 2 absorption model used within the Orbiting Carbon Observatory (OCO-2) algorithm are described and validated. A set of 164 atmospheric spectra from the Total Carbon Column Observing Network (TCCON) is used to compare three models, both previous and ...
Based on the radiance measurements in the 0.76 渭m O_2A band, 1.61 渭m(weak), and 2.06 渭m(strong) CO_2 bands, the current combination of the A-Band Preprocessor(ABP) algorithm and Iterative Maximum A Posteriori(IMAP) Differential Optical Absorption Spectroscopy(DOAS) Preprocessor(IDP) ...
(ABP)algorithmandIterativeMaximumAPosteriori(IMAP)DifferentialOpticalAbsorptionSpectroscopy(DOAS)Preprocessor(IDP)algorithmpassesaround20%-25%ofallsoundings;whichmeansthatsomecontaminatedscenesalsopassthescreeningprocess.Inthiswork;threeindependentpairsofthresholdparametersusedintheABPandIDPalgorithmsaresufficientlytuneduntil...
In addition, the algorithm currently requires cloud optical depth, cloud top height, and aerosol properties measured by other instruments as input. In idealized simulations using ten thousand A-band spectra spanning a range of cloud cases, the root mean squared error (RMSE) of the retrieval is ...