The control segment comprises a ground-based network of master control stations, data uploading stations and monitor stations; in the case of GPS, two master control stations (one primary and one backup), four data uploading stations and … The ground stations are located at Hawaii, Colorado Springs, Ascension Island, Diego Garcia, and Kwajalein. The monitor stations passively track the GPS satellites as they pass overhead by making pseudorange and delta range measurements. This system consists of three segments: the space segment, the control segment, and the user segment. The latest update to the GPS OCS, Architectural Evolution Plan 7.5, was installed on November 16, 2018. The complete GPS space system includes 24 satellites, 11,000 nautical miles above the earth, take 12 hours each to go around the earth once or one orbit. 3 Segments of GPS The Control Segment: This part consists of 5 worldwide unmanned base-stations that monitor the satellites to track their exact position in space, and to make sure that they are operating correctly. Like in GPS, the GLONASS Control Segment monitors the status of satellites, determines the ephemerides and satellite clock offsets and, twice a day, uploads the navigation data to the satellites. The Moon's orbit is around 9 times as large as geostationary orbit. Comparison of geostationary, GPS, GLONASS, Galileo, Compass (MEO), International Space Station, Hubble Space Telescope, Iridium constellation and graveyard orbits, with the Van Allen radiation belts and the Earth to scale. The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services. It comes from the Control Segment. Seven segment displays are the output display devices that provide a way to display information in the form of image or text. Raytheon won a $886 million contract to develop the OCX next-generation GPS control segment in 2010. The MCS is the center of the control segment operations and is located at Falcon Air Force Base, Colorado Springs, CO. The GPS design originally called for 24 SVs, eight each in three circular orbital planes. (In the SVG file, hover over an orbit or its label to highlight it; click to load its article.) The Space Unit consists of 24 active satellites which are assembled with huge solar panels with rechargeable batteries that act as a power source. The Master Control facility is located at Schriever Air Force Base (formerly Falcon AFB) in the State of Colorado, USA. The GLONASS Ground Segment (also referred to as Control Segment or Operational Control System) is the responsible for the proper operation of the GLONASS system. GPS receivers convert SV signals into position, velocity, and time estimates. User segment: GPS User Segment consists of the GPS receivers and the user community. Control Segment The control segment consists of one Master Control Station (MCS) and five monitoring stations. Deliver the capability to fly the next-generation of GPS satellites – GPS IIF The Master Control facility is located at Schriever Air Force Base (formerly Falcon AFB) in the State of Colorado, USA. An overview of control segment operations is presented in Figure 3.3. For better understanding of GPS, we normally consider three major segments viz. GPS satellites are under surveillance of the Control Segment. The typical receiver is composed of an antenna and pre-amplifier, radio signal microprocessor, control and display device, data recording unit, and power supply. On this order Raytheon will do the work in Aurora, Colo., and should be finished by April 2022. But, some displays can also show characters and images. Space segment deals with GPS satellites systems, Control segment describes ground based time and orbit control prediction and in User segment various types of existing GPS receiver and its application is dealt . Modernize existing GPS ground segment by replacing the aging mainframe based launch and satellite command and control systems with modern commercial off-the-shelf-based client-server systems. The five monitor stations are used to track the flight paths of the satellite, which located at Hawaii, Kwajalein, Diego Garcia, Ascension Island … GPS - Control Segment. The U.S. Air Force develops, maintains, and operates the space and control segments. GPS ELEMENTS We can divide GPS system into three segments. user segment. A global positioning system with space segment of 24 satellites, control segment for monitoring and a GPS receiver to receive and obtain location details.