NESDIS RO Science Studies and Quality Assurance through the STAR Integrated Cal/Val System
Presenter:
Shu-peng Ho
NOAA/NESDIS/STAR
NOAA/NESDIS/STAR
Talk
Global Positioning System Radio Occultation data provide valuable and unique atmospheric information because of their high accuracy and precision, high vertical resolution, insensitivity to clouds and precipitation, and global coverage. It has been demonstrated in many studies that GPS RO data have had major impacts on weather, climate and ionospheric science and on numerical weather prediction. Recently the National Environmental Satellite, Data, and Information Service (NESDIS) Center for Satellite Applications and Research (STAR) has developed a comprehensive Integrated Cal/Val System (ICVS) with a web interface for radio occultation to support the validation and monitoring of COSMIC-2 and many RO missions. In this presentation, we present the current science studies to improve the ICVS functionalities. Initial results for using the RO calibrated GRUAN RS92 and RS41 temperature measurements to validate other RO measurements are demonstrated. The results to use global RO data to calibrate temperature biases in the upper troposphere and lower stratosphere for different radiosonde sensor types are also presented. We also present the current results for the designed functionalities for STAR/ICVS include i) monitoring of major parameters and metrics for the COSMIC-2 products and instrument performance at all product levels, ii) routine comparisons of retrieved atmospheric profiles with other satellite observations and retrievals including microwave, infrared, and models, iii) routine comparison of profiles with those from radiosondes, iv) systematic web interface with many capabilities, v) long-term monitoring of the parameters. The initial validation of COSMIC-2 measurements under the STAR/ICVS is also presented. The general NOAA radio occultation observing architecture, COSMIC-2 program status, and general functions of ICVS for all NOAA/STAR satellite data are presented separately. Detail RO data monitoring studies and science studies are presented by other NOAA STAR scientists.
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