Showing papers by "Charles E. Miller published in 2007"
California Institute of Technology1, NASA Headquarters2, Los Alamos National Laboratory3, University of California, Irvine4, University of Michigan5, Centre national de la recherche scientifique6, Harvard University7, University of Toronto8, Colorado State University9, Woods Hole Oceanographic Institution10, Goddard Space Flight Center11, National Institute of Water and Atmospheric Research12, University of California, Berkeley13, Earth System Research Laboratory14, CSIRO Marine and Atmospheric Research15
TL;DR: In this article, the authors determined the precision requirements for column-averaged CO2 dry air mole fraction (X(sub CO2)) data products to be delivered by the Orbiting Carbon Observatory (OCO).
Abstract: Precision requirements have been determined for the column-averaged CO2 dry air mole fraction (X(sub CO2)) data products to be delivered by the Orbiting Carbon Observatory (OCO). These requirements result from an assessment of the amplitude and spatial gradients in X(sub CO2), the relationship between X(sub CO2) precision and surface CO2 flux uncertainties calculated from inversions of the X(sub CO2) data, and the effects of X,,Z biases on CO2 flux inversions. Observing system simulation experiments and synthesis inversion modeling demonstrate that the OCO mission design and sampling strategy provide the means to achieve the X(sub CO2) precision requirements. The impact of X(sub CO2) biases on CO2 flux uncertainties depend on their spatial and temporal extent since CO2 sources and sinks are inferred from regional-scale X(sub CO2) gradients. Simulated OCO sampling of the TRACE-P CO2 fields shows the ability of X(sub CO2) data to constrain CO2 flux inversions over Asia and distinguish regional fluxes from India and China.
298 citations
TL;DR: In this paper, a multispectrum nonlinear least squares retrieval technique was modified to adjust the rovibrational constants (G, B, D, etc.) and intensity parameters, including Herman-Wallis terms, rather than retrieving the individual positions and intensities.
116 citations
TL;DR: In this article, the authors reported line position, intensity and line shape parameters (Lorentz widths, pressure shifts, line mixing, speed dependence) for transitions of the 30013 − − − 1 band of 16O12C16O (ν 0 − − 6227.9 cm−1) with the McMath-Pierce Fourier transform spectrometer.
93 citations
TL;DR: In this article, the authors measured line positions and strengths of 16O12C18O (628), 18O12c18O(828), and 17O12 c18o (728) using 22 near infrared (NIR) absorption spectra recorded at 0.01-0.013 cm−1 resolution with the McMath-Pierce Fourier transform spectrometer located at the National Solar Observatory on Kitt Peak, Arizona.
57 citations
TL;DR: In this paper, the authors reported nearly 400 air-broadened half width and air-induced pressure shift coefficients spanning 11 different CO 2 vibrational bands in the 4750-7000 cm −1 region.
51 citations
03 Mar 2007
TL;DR: This paper presents a global atmospheric science mission concept design system that allows scientists to explore a large range of mission concepts integrating the measurement requirement parameters and evaluation metrics.
Abstract: Knowledge about the Earth system (i.e., the physical-chemical processes that describe its evolution) is generated from global measurements of geophysical parameters taken at appropriate mission observation scenarios. Any given instrument transforms the incoming signal into an instrument-dependent output, from which the scientific observable of interest, say a chemical constituent, is eventually retrieved. The ability to simulate high-fidelity incoming geophysical signals, instrument transformations, and retrievals is currently project specific, and this ability is developed after a particular instrument design has been chosen. This seriously limits the process of conceiving the next-generation missions starting from the science questions to be answered, and choosing the appropriate measurement strategy based on the expected accuracy and precision. To enable science-driven mission concept formulation and design validation, the atmospheric scientists at JPL developed a set of parameters for defining the measurement requirements that are verifiable and traceable and a set of metrics for evaluating the mission concepts that are quantifiable and tradable. This paper presents a global atmospheric science mission concept design system that allows scientists to explore a large range of mission concepts integrating the measurement requirement parameters and evaluation metrics.
6 citations