@ElectronicSource{SapucciGonçHerd:2010:InHuEs,
             abstract = "Although the zenithal tropospheric delay generated in the 
                         radio-frequency signal in the groundbased Global Navigation 
                         Satellite System (GNSS) receivers should be minimized for geodesic 
                         applications, it can be estimated with relative precision and 
                         converted in Integrated Water Vapor (IWV) values. These values 
                         have shown good quality and their association with GNSS receivers 
                         network can mitigate the deficiency for upper tropospheric 
                         humidity measurements. In recent years the density of the 
                         Brazilian Network for Continuous GNSS Monitoring (RBMC) has 
                         increased significantly, doubling the number of ground-based GNSS 
                         receivers during the last two years. With continued investment by 
                         Brazilian agencies in support of ongoing research, the number of 
                         receivers available over Brazilian territory should double again 
                         over the next 2 years, reaching a total of 150. Those investments 
                         have also been applied to the acquisition of meteorological 
                         sensors and real time data transmission systems. One of the main 
                         goals of these research projects is the continuous monitoring of 
                         the IWV to improve numerical weather prediction over the Brazilian 
                         territory. The IWV values from some selected GNSS receivers are 
                         used in this work as supplemental source of humidity in the data 
                         assimilation system at the CPTEC-INPE. The main objective of this 
                         work is to investigate the contribution of humidity values from 
                         GNSS receivers to the improvement of the quality of the analyses 
                         and forecasts. In order to assess the impact of these datasets on 
                         the performance of CPTEC/INPEs assimilation system, experiments 
                         with and without the inclusion of humidity values from GNSS 
                         receivers were conducted. Other studies by the data assimilation 
                         group at CPTEC/INPE are in progress, such as the inclusion of 
                         radioccultation GNSS profiles and the operational implementation 
                         of a Local Ensemble Transform Kalman Filter methodology in 
                         collaboration with the University of Maryland, College Park, USA. 
                         Additional studies will be necessary for the future integration of 
                         all these developments, which will contribute to CPTEC/INPEs 
                         ability to generate improved forecasts over South America.",
              address = "S{\~a}o Jos{\'e} dos Campos",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
               author = "Sapucci, Luiz Fernando and Gon{\c{c}}alves, Luis Gustavo 
                         Gon{\c{c}}alves de and Herdies, Dirceu L.",
             keywords = "Atmosphere monitoring with geodetic techniques, data assimilation, 
                         instruments and techniques, remote sensing.",
             language = "en",
            publisher = "Instituto and Nacional and de and Pesquisas and Espaciais",
                  ibi = "8JMKD3MGP7W/383FSM2",
                  url = "http://urlib.net/ibi/8JMKD3MGP7W/383FSM2",
           targetfile = "v1.pdf",
                title = "The inclusion of humidity estimates from brazilian ground-based 
                         GNSS network into the CPTEC/INPE global data assimilation system",
         typeofmedium = "On-line",
                 year = "2010",
        urlaccessdate = "29 jun. 2024"
}