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GPS Block IIIF, or GPS III Follow On (GPS IIIF), is the second set of GPS Block III satellites, consisting of up to 22 space vehicles. The United States Air Force began the GPS Block IIIF acquisition effort in 2016. [7] On 14 September 2018, a manufacturing contract with options worth up to $7.2 billion was awarded to Lockheed Martin.
The GPS Operational Control Segment (OCS), consisting of a worldwide network of satellite operations centers, ground antennas and monitoring stations, provides Command and Control (C2) capabilities for GPS Block II satellites. [60] The latest update to the GPS OCS, Architectural Evolution Plan 7.5, was operationally accepted in 2019. [61]
NEXTAR (from NEC Next Generation Star) is a Low Earth orbit Earth observation satellite bus designed and manufactured by NEC Space Systems of Japan. [ 1 ] [ 2 ] This three axis stabilized platform has a bus dry mass of 250 kg (550 lb), it can carry payloads up to 250 kg (550 lb) and 600 W.
Like earlier GPS satellites, Block IIF spacecraft operate in semi-synchronous medium Earth orbits, with an altitude of approximately 20,460 km (12,710 mi), and an orbital period of twelve hours. The satellites supplement and partially replace the GPS Block IIA satellites that were launched between 1990 and 1997 with a design life of 7.5 years ...
3. Space Segment: composed of at least three geostationary satellites broadcasting corrections and integrity information for GPS satellites in the L1 frequency band (1575.42 MHz). This space segment configuration provides a high level of redundancy over the whole service area in the event of a failure in the geostationary satellite link.
X3: Reunion is a single-player space trading and combat video game developed by Egosoft and published by Deep Silver. It is the third installment in the X series and the sequel to X2: The Threat (2003), which in turn followed X: Beyond the Frontier (1999). X3: Reunion was released originally for Windows in 2005.
The Nexter Narwhal is a type of remotely operated naval artillery turret made by the French company Nexter.It houses a 20 mm autocannon based on the Nexter M621 and M693.The name "Narwhal" is a backronym of "NAval Remote Weapon, Highly Accurate, Lightweight". [2]
An early prototype iDrive (called the Intuitive Interaction Concept) was featured on the BMW Z9 concept in 1999. The production version debuted in September 2001 in the BMW 7 Series (E65) and was built on the VxWorks kernel [4] while the Navigation computer used Microsoft Windows CE for Automotive; [5] this can be seen when the system reboots or restarts after a software crash, displaying a ...