GNSS refers to the collection of the world’s global satellite based positioning systems. It includes GPS (United States) GLONASS (Russia) GALILEO (European Union) BEODOU (China) IRNSS (India) QZSS (Japan). GNSS can provide centimetre level accuracy with a low-cost receiver, if an error correction technique is used. GNSS are recognized to be the systems of choice in outdoor environments and, to a great extent, one of the most accurate source of position (and precise timing) information when it is available. T he first satellite navigation system was Transit, a system deployed by the US military in 1960’s. Transit’s operations were based on the Doppler Effect: the satellites travelled on well-known paths and broadcast their signals on well-known radio frequency. The received frequency will differ slightly from the broadcast frequency because of the movement of the satellite with respect to the receiver. The satellite broad cast signals that contains orbital data (from which the position of the satellite can be calculated) and the precise time, the signals is transmitted. There are multiple constellations of GNSS satellites orbiting the earth. GNSS satellites’ orbit situated about 20,000 km above the earth’s surface. They are moving very fast, several kilometres per second. The latest generation of GNSS satellites (Block IIF) weight over 1,400 kg.
What is Cultural Realms of the World- what is Occidental Realm-Type is of Occidental Realm, what is Islamic Cultural Realm- what is Indie Cultural Realm
Cultural realm refers to a type of cultural region. Cultural region is a continuous geographical area characterized by cultural homogeneity. It may be classified into three categories as macro, meso and micro region. Cultural realm is classified based on the attitude, religious belief, language, racial group, technological development, etc. There are twelve Cultural realms in […]
Remote sensing- what are remote sensing tools – what is Energy Source and example – what is Radiation and the Atmosphere – what is Interaction with the target – what is Recording of energy by the sensor – what is Transmission, Reception and Processing – what is Image Restoration – what is Image Enhancement – what is Interpretation and Analysis- Further it depends on the following aspects
Remote sensing is an integrated discipline encompassing some branches of arts, science and technology of collecting information about the terrestrial objects using camera and sensor system. Elements of Remote Sensing 1. Energy Source The primary requirement for remote sensing is to have an energy service, which provides electromagnetic energy to the target of interest. The […]
Geographic Information System- what is meaning of Geographic Information System- what is an explain Geographic Information System- what is purposes GIS- what is Generation of the computers
The Geographic information systems have emerged in the past two decades as an essential tool for urban and resource planning and management. It includes the functions of data entry, data display, data management,information retrieval and analysis. While GIS deals with entire geography of the earth including land, ocean and atmosphere, the art, science and technology […]