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In April 1968 the Sentinel production contract was signed, the first production contract for a US ABM system. At the time, the cost for the system was estimated to be $4 to $6 billion ($37 to $55 billion in 2025) and as much as $20-$60 billion if the system was to be expanded to deal with any sort of Soviet threat as well.
On January 19, 2024, the USAF announced that the LGM-35A Sentinel program will exceed its original budget estimate of $95.3 billion by at least 37%, pushing the total cost to over $125 billion, and the service entry will be delayed by two years. [1] This estimate was raised to $140.9 billion in July 2024 following a Nunn-McCurdy review. [10]
The Sentinel A4 is a complete redesign of the sensor that uses digital processing and solid-state antenna modules based on gallium nitride (GAN) transmitters. The scalable modular architecture is shared with the long-range AN/TPY-4 radar, which has 1000 individually controlled elements and uses GPU computing for signal processing.
[36] [37] [38] The semi-official Tasnim news agency of Iran reported in September 2016 that a UAV named Saegheh-2, similar in appearance to the RQ-170 Sentinel, had been built. It was said to be able to carry four precision-guided bombs; the range was not stated. The Shahed 171 Simorgh is also based on the downed Sentinel. [39]
The Sentinel-6 program includes two identical satellites, to be launched five years apart, Sentinel-6 Michael Freilich, which launched on 21 November 2020, [3] and Sentinel-6B, which will launch in 2025. [4] These satellites will measure sea level change from space, which have been measured without interruption since 1992. [5] [6]
Sentinel-1 is the first of the Copernicus Programme satellite constellations conducted by the European Space Agency. [4] The mission was originally composed of a constellation of two satellites, Sentinel-1A and Sentinel-1B, which shared the same orbital plane. Two more satellites, Sentinel-1C and Sentinel-1D are in development.
Defense Secretary Lloyd Austin’s office on Monday certified the Sentinel nuclear missile program can continue after determining the effort is a major national security priority with no ...
IdleAir, a division of Convoy Solutions LLC, is a company that provides in-cab services to truckers via centralized systems at truck stops around the United States.IdleAir's service, the patented [3] Advanced Travel Center electrification (ATE), was more complex and more expensive than traditional truck stop electrification (TSE) systems which are aimed at idle reduction reducing the amount of ...
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