Browsing by Author "Makabayi, Brian"

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    Analysis of the Accuracy of GMF, NMF, and VMF1 Mapping Functions with GPT 50 a Priori Zenith Constraint in Tropospheric Delay Modelling
    (2015-01) Makabayi, Brian; Hunegnaw, Addisu
    When modelling the tropospheric delay in Global Positioning System (GPS), the zenith delay is mapped to the slant with numerous mapping functions. The accuracy of the modelled tropospheric delay will be affected by the kind of mapping function used. Fixing the a priori zenith constraint as Global Temperature Pressure Humidity 50 (GPT 50), this paper compares the accuracy of the different mapping. Global Mapping Function (GMF), Niell Mapping Function (NMF) and Updated Vienna Mapping Function (VMF1), the update of Vienna Mapping Function (VMF) are the mapping functions studied. All these are used with the saastamoinen tropospheric delay model which is used in the GPS Analysis Software for the Massachusetts Institute of Technology software (GAMIT_GLOBK). For the north and east offsets these mapping functions achieved the same accuracy and can therefore be used interchangeably in modelling of the tropospheric delay effect in the planner. However, for the up offsets VMF1 achieved better accuracy compared to GMF and NMF however, being more consistent with GMF than NMF. In the future, if more mapping functions are incorporated in GAMIT_GLOBK, the accuracy of these new mapping functions should be investigated and use another a priori zenith constraint – meteorological data, which will improve positioning using Global Navigation Satellite System (GNSS).
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    To What Extent Have the Existing Land Tenure Systems Affected Urban Land Development?
    (2015) Makabayi, Brian; Musinguzi, Moses
    In Uganda, urban areas develop in pockets compared to other countries with a uniform land tenure system. This research sought to investigate the extent to which the existing tenure systems affect urban land development. In this research, different land tenure systems were identified in the urban areas, development patterns on different land tenure systems were described, constraints imposed by land tenure systems on development were examined and services together with the nature of housing on different land tenure systems were investigated. Observations were made in Mbarara and Arua Municipality on the nature of developments on registered land and non-registered land. In each municipality, some areas were observed to be more orderly and better spatially organized than others for example in Mbarara municipality, Kamukuzi area, which is a predominantly residential area under leasehold and freehold tenure, was found to be more spatially organized than Kisenyi, a residential area for the poor under customary tenure. Houses on untitled land were mainly one roomed houses, constructed from inferior materials such as mud/wattle and grass well as housing on titled land were one, two and three bedroom houses and constructed with expensive materials such as burnt bricks, iron sheets and tiles. Areas on untitled land had a limited access to piped water, electricity, roads, education facilities, drainage, garbage collection points, and toilets compared to titled land that had better services. Formalization resurveying of land for documentation should be done in a participatory incremental manner so as to avoid possible resistance from the settlers. This would enable the planning of the areas the people live in.