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Khaled Mahmoud

Khaled Mahmoud
Benha University · Department of Surveying Engineering (Faculty of Engineering at Shoubra)

About

16
Publications
781
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14
Citations

Publications

Publications (16)
Article
The heights determined by Global Positioning System (GPS) refer to the ellipsoid called the World Geodetic System 1984 (WGS84). Global Geopotential Models (GGMs) that are available on GNSS commercial software are generally used to transform ellipsoidal heights to orthometric heights. In this study, the geoid heights of GPS/Levelling were computed t...
Article
Full-text available
The Digital Elevation Models (DEMs) are used to represent the topographic surface of the earth as it is used in many applications. Nowadays, many free DEMs are available online. This study aims to assess the accuracy of six free DEMs. This research uses the GPS observations to determine the elevation stations in the study area by using the Post-Pro...
Article
Full-text available
The orbital error is one of the errors in GPS which affect the accuracy of GPS positioning. In this research GPS broadcast, ultra-rapid, rapid and precise satellite ephemerides are used for processing different baseline lengths among some CORS stations by using the Trimble Business Center software (TBC) and different satellite ephemerides (NRCan ul...
Article
The fixed stations of a geodetic network are continuously changing, due to the change of its tectonic plate. When the instantaneous coordinates of the stations at any epoch are needed, the velocity of the stations should be known. The velocity of any station is determined by two techniques, firstly by using the time series of GPS observation and se...
Article
Full-text available
The fixed stations of a geodetic network are continuously changing, due to the change of its tectonic plate. When the instantaneous coordinates of the stations at any epoch are needed, the velocity of the stations should be known. The velocity of any station is determined by two techniques, firstly by using the time series of GPS observation and se...
Article
The fixed stations of a geodetic network are continuously changing, due to the change of its tectonic plate. When the instantaneous coordinates of the stations at any epoch are needed, the velocity of the stations should be known. The velocity of any station is determined by two techniques, firstly by using the time series of GPS observation and se...
Article
The ionosphere is one of several layers of the Earth’s atmosphere. The influence of the ionosphere on GPS positioning is one of the largest error sources. It is generally modeled in a global scale by determining its Total Electron Content (TEC) in the signal path using all available world wide GPS observations to be used in GPS processing procedure...
Article
Full-text available
The ionosphere is one of several layers of the Earth’s atmosphere. The influence of the ionosphere on GPS positioning is one of the largest error sources. It is generally modeled in a global scale by determining its Total Electron Content (TEC) in the signal path using all available world wide GPS observations to be used in GPS processing procedure...
Article
This research presents study using a satellite image of Landsat TM-5 to obtain a soil classified map for Northern Sinai using the supervised classification techniques. These techniques depend on taking the training areas (signatures) on the image from reference such as geological map for the same area. Three methods of supervised classification wer...
Article
This research presents a study using satellite image of Landsat TM-5 to obtain a soil classified map for Northern Sinai using the supervised classification techniques. These techniques depend on taking the training areas (signatures) on the image from reference such as geological map for the same area. Three methods of supervised classification wer...
Article
Full-text available
This research presents a study using satellite image of Landsat TM-5 to obtain a soil classified map for Northern Sinai using the supervised classification techniques. These techniques depend on taking the training areas (signatures) on the image from reference such as geological map for the same area. Three methods of supervised classification wer...

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