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The four operational modes offered by Sentinel-1 are: [11] [16] [17] Strip Map (SM) Mode, which features 5-by-5-metre (16 by 16 ft) spatial resolution and an 80 km (50 mi) swath. The sole uses of SM are to monitor small islands as well as emergency management for extraordinary events upon request.
Sentinel-1A is a European radar imaging satellite launched in 2014. It is the first Sentinel-1 satellite launched as part of the European Union's Copernicus programme. The satellite carries a C-band Synthetic Aperture Radar which will provide images in all light and weather conditions. It analyzes many phenomena occurring on Earth, from ...
Sentinel-1B was a European radar imaging satellite launched on 25 April 2016. It is the second of two original satellites in the Sentinel-1 constellation, part of the European Union's Copernicus programme on Earth observation. The satellite carries a C-SAR sensor, capable of providing high-resolution imagery regardless of weather conditions.
The U.S. Army ordered the A3 Enhanced Sentinel improvement program in 2011. [3] The upgrade includes the TPX-57 Mode 5 Identification Friend or Foe (IFF) modification kit, which consists of a new Ethernet router, enhanced Radar Control Terminal (eRCT), Signal Data Processor (SDP) box, and multiple circuit card assemblies.
[1] [9] A revised cost estimate released by the Department of Defense on July 8, 2024, put total program acquisition costs for the Sentinel program at $140.9 billion. [10] The United States Air Force plans to procure 634 Sentinel missiles, plus an additional 25 missiles to support development and testing, to enable the deployment of 400 missiles.
USCGC Richard Etheridge is the second of the United States Coast Guard's Sentinel-class cutters. Like most of her sister ships she replaced a 110-foot (34 m) Island-class patrol boat . Richard Etheridge was launched in August 2011.
USCGC Forrest Rednour (WPC-1129) is the 29th Sentinel-class cutter built for the United States Coast Guard. [3] She was the first of the four vessels of her class to be home-ported at USCG Base Los Angeles/Long Beach in San Pedro, California.
The Raytheon Sentinel is a retired airborne battlefield and ground surveillance aircraft formerly operated by the Royal Air Force (RAF). While based on the Bombardier Global Express ultra long-range business jet, the prime contractor for the Sentinel was the American defence firm Raytheon, which supplied most of the mission systems and performed the integration work.
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