@Article{StevensonAlon:1986:PaI,
               author = "Stevenson, Merritt Raymond and Alonso, Eduardo Mena Barreto",
                title = "Development of a satellite-tracked oceanographic drifting buoy for 
                         the Brazilian Antarctic Program. Parte I",
                 year = "1986",
                pages = "23",
             keywords = "OCEANOGRAFIA, ANTARTICA (REGIAO), BOIAS DE DERIVA, BOIAS 
                         OCEANOGRAFICA, SISTEMA ARGOS, OCEANOGRAPHY, DRIFTING BUOYS, 
                         OCEANOGRAPHIC BUOYS, ARGOS SYSTEM.",
             abstract = "One of the objectives of the project Measurement of the Antarctic 
                         Current (MEDICA)is to develop, build and launch drifting 
                         oceanographic buoys, located by System ARGOS, in Antarctica. 
                         Previously such national buoy technology did not exist in Brazil. 
                         The basis of the drifting buoy was to use a Data Collection 
                         Platform (DCP), already developed by INPE for land use and 
                         certified by the Centre National d'Etudes Spatiales (CNES), in 
                         France. Consideration was gieven to using nationally made 
                         materials to the maximun extent possible. A biconic geometry was 
                         used for the buoy hull to provide good vertical stability and 
                         resistance to entrapment by ice. Fiberglass was used for its high 
                         strength to weight ratio, as well as the facility to use molds for 
                         production of the hulls. Sandwich construction was incorporated by 
                         a commercial firm (producing the hull)and provided for outer and 
                         inner hulls of fiberglass with polyrethane foam between the walls. 
                         Within the hull, the DCP unit and its interface box are mounted 
                         within a metal conical rack. The transmitting antenna is mounted 
                         on a metal base-plane disc and, in turn, is secured atop the rack. 
                         A power supply, consisting of serveral hundred alkaline dry cells, 
                         suitably interconnected and sealed within a plastic housing, 
                         resides below the rack for maximun buoy stability. The sensor 
                         cable was developed in collaboration with the Institute for Naval 
                         Research (IPqM)and consists of a 10 m long oil filled hose 
                         containing 2 thermistors, at 0,5m and 10m from the top of the 
                         cable. An additional thermistor is mounted in a housing on the 
                         conical cover of the buoy and provides air temperature readings. 
                         The physical specifications and measuring capabilities of the 
                         sensors, as well as some results, are reviewed in the 
                         presentation.",
                label = "737",
                  ibi = "6qtX3pFwXQZ3r59YD6/GNtJb",
                  url = "http://urlib.net/ibi/6qtX3pFwXQZ3r59YD6/GNtJb",
           targetfile = "INPE 3793.pdf",
        urlaccessdate = "12 maio 2024"
}