This article introduces the different development stages of reference materials （RMs） in China to illustrate their evolutionary course, describing their present situation and devel- opment trends, and proposing new ...This article introduces the different development stages of reference materials （RMs） in China to illustrate their evolutionary course, describing their present situation and devel- opment trends, and proposing new working areas and priorities.展开更多
Using an international reference ionosphere(IRI)model as a background ionosphere and applying the Kalman filter to update the state with observations,we develop an ionosphere data assimilation analysis system(IDAAS)to...Using an international reference ionosphere(IRI)model as a background ionosphere and applying the Kalman filter to update the state with observations,we develop an ionosphere data assimilation analysis system(IDAAS)to reconstruct a three-dimensional(3D)ionosphere with the GPS slant TEC and ionosonde data over east-south Asia.The preliminary results with the GPS data collected over east-south Asia on 30 June 2005 showed that inversed slant TEC has very good correlation with the observations both for the GPS sites being and not being involved in reconstruction.The inversed NmF2 and vertical TEC both demonstrate great improvement of agreement with those observed from ionosondes and TOPEX satellite independently.展开更多
文摘This article introduces the different development stages of reference materials （RMs） in China to illustrate their evolutionary course, describing their present situation and devel- opment trends, and proposing new working areas and priorities.
基金supported by the National Natural Science Foundation of China(Grant Nos.41274159 and 40974094)the Special Scientific Research Fund of Meteorological Public Welfare Profession of China(Grant No.GYHY201106012)
文摘Using an international reference ionosphere(IRI)model as a background ionosphere and applying the Kalman filter to update the state with observations,we develop an ionosphere data assimilation analysis system(IDAAS)to reconstruct a three-dimensional(3D)ionosphere with the GPS slant TEC and ionosonde data over east-south Asia.The preliminary results with the GPS data collected over east-south Asia on 30 June 2005 showed that inversed slant TEC has very good correlation with the observations both for the GPS sites being and not being involved in reconstruction.The inversed NmF2 and vertical TEC both demonstrate great improvement of agreement with those observed from ionosondes and TOPEX satellite independently.
