Assimilation of global navigation satellite radio occultation observations in GRAPES: Operational implementation
نویسندگان
چکیده
منابع مشابه
Assimilation of GNSS radio occultation observations in GRAPES
This paper reviews the development of the global navigation satellite system (GNSS) radio occultation (RO) observations assimilation in the Global/Regional Assimilation and PrEdiction System (GRAPES) of China Meteorological Administration, including the choice of data to assimilate, the data quality control, the observation operator, the tuning of observation error, and the results of the obser...
متن کاملThe Assimilation of Radio Occultation Measurements
GPS radio occultation (RO) measurements are a potentially important new source of profile information that can be used in numerical weather prediction (NWP). This paper outlines the options for assimilating the RO measurements into an operational NWP system. The importance of realistic estimates for the observation error estimates is discussed.
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Timely and accurate monitoring of global weather anomalies and drought conditions is essential for assessing global crop conditions. Soil moisture observations are particularly important for crop yield fluctuations provided by the US Department of Agriculture (USDA) Production Estimation and Crop Assessment Division (PECAD). The current system utilized by PECAD estimates soil moisture from a 2-...
متن کاملThe ionosphere , radio navigation , and global navigation satellite systems
This article is a review of Global Navigation Satellite Systems for space scientists who are interested in how GNSS signals and observables can be used to understand ionospheric dynamics and, conversely, how ionospheric dynamics affect the operational capabilities of GPS. The most common form of GNSS is the Global Positioning System (GPS); we will first review its operating principles and then ...
متن کاملAssimilation of GPS Radio Occultation Data for Numerical Weather Prediction
With the availability of approximately 4,000 radio occultation soundings per day within three hours of observation, COSMIC has the potential to contribute significantly to global and regional weather analysis and prediction. However, the basic radio occultation measurements (phase delays) are very different from traditional meteorological measurements (i.e., temperature, water vapor), and to ef...
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ژورنال
عنوان ژورنال: Journal of Meteorological Research
سال: 2014
ISSN: 2095-6037,2198-0934
DOI: 10.1007/s13351-014-4028-0