GPS, lineaarikombinaatio, ionosfääri, troposfääri, ITRF89, referenssiasema, mareografiasema, parametrien estimointi

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Ocean Surface Salinity Remote Sensing With the JPL Passive/Active L-/S-Band (PALS) Microwave Instrument

Describes the measurements acquired by the aircraft Passive/Active L-/S-band (PALS) instrument from two field campaigns in 1999 and 2000. These measurements were in support of the development of ocean surface salinity remote sensing techniques for the future Aquarius space mission. The 2000 measurements demonstrated the aircraft radiometer stability of /spl plusmn/0.3 K over time periods of 30 minutes with a salinity measurement accuracy of 0.2 PSS (Practical Salinity Scale or parts per thousand)

A Framework for Moving Sensor Data Query and Retrieval of Dynamic Atmospheric Events

Abstract. One challenge in Earth science research is the accurate and efficient ad-hoc query and retrieval of Earth science satellite sensor data based on user-defined criteria to study and analyze atmospheric events such as tropical cyclones. The problem can be formulated as a spatiotemporal join query to identify the spatio-temporal location where moving sensor objects and dynamic atmospheric event objects intersect, either precisely or within a user-defined proximity. In this paper, we describe an efficient query and retrieval framework to handle the problem of identifying the spatio-temporal intersecting positions for satellite sensor data retrieval. We demonstrate the effectiveness of our proposed framework using sensor measurements from QuikSCAT (wind field measurement) and TRMM (precipitation vertical profile measurements) satellites, and the trajectories of the tropical cyclones occurring in the North Atlantic Ocean in 2009. Key words: data retrieval, satellite data, atmospheric events, spatiotempora

Inscrições de si: da porta de banheiro ao chat

Writing pervades human history, from rupestrian inscriptions to internet. Although supports change – walls, papyrus, parchments, tiles, papers, computer monitors – there remains a register, which transports human being beyond its own existence and which, precisely, renders it existing. In this thesis, I argue that restroom graffiti, apocryphal and ephemeral by their nature, are a link of the chain that identifies human being as the one who is capable of writing. It is an entity that can be figured out through its marks. Without aiming to interpret inscriptions, I restrict myself to observing that a great amount of impressions prefer to be revealed on the subversive support of the cell defined by the restroom door. And that the freedom of being anonymous that characterizes that door is kept when its contents are transposed to internet chatsSubmitted by Rogele Pinheiro ([email protected]) on 2018-01-17T16:36:01Z No. of bitstreams: 1 79337_Dagoberto.pdf: 1658018 bytes, checksum: 52d6a5632b5504995da34b4ef506d1d8 (MD5)Approved for entry into archive by Gheovana Figueiredo ([email protected]) on 2018-01-17T17:12:37Z (GMT) No. of bitstreams: 1 79337_Dagoberto.pdf: 1658018 bytes, checksum: 52d6a5632b5504995da34b4ef506d1d8 (MD5)Made available in DSpace on 2018-01-17T17:12:37Z (GMT). No. of bitstreams: 1 79337_Dagoberto.pdf: 1658018 bytes, checksum: 52d6a5632b5504995da34b4ef506d1d8 (MD5) Previous issue date: 2005A escrita permeia a história da humanidade desde as inscrições rupestres até a internet. Embora mudem os suportes – paredes, papiros, pergaminhos, cerâmica, papel, o monitor de um computador –, permanece um registro que transporta o ser humano para além de sua própria existência e que, justamente, faz com que passe a existir. Defendo a idéia, nesta dissertação, de que os grafitos de porta de banheiro, apócrifos e efêmeros por natureza, são elo na corrente que identifica o ser humano como ser que é capaz de escrever. Ele é uma entidade que pode ser descoberta por suas marcas. Sem buscar interpretar as inscrições, atenho-me a observar que uma extensa quantidade de impressões prefere ser revelada no suporte subversivo da célula que a porta de banheiro encerra. E que a liberdade desta mesma porta de aparecer anônima se mantém quando seus conteúdos são transportados para a internet, para as salas de bate-papo