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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.
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.
1. Ground segment: comprises a network of 40 Ranging Integrity Monitoring Stations (RIMS), 2 Mission Control Centres (MCC), 2 Navigation Land Earth Stations (NLES) per Geostationary Earth Orbit (GEO), and the EGNOS Wide Area Network (EWAN), which provides the communication network for all the components of the ground segment.
Two recurrent satellites, Sentinel-3C and Sentinel-3D, will follow in approximately 2025 and 2028 respectively to ensure continuity of the Sentinel-3 mission. [7] Each Sentinel-3 satellite is designed to operate for seven years in a sun-synchronous low-Earth orbit. The satellites use multiple sensors to measure topography, temperature, marine ...
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: Mars Defense is an iOS sci-fi tower defense game developed by British indie studio Origin8 Technologies and released on February 27, 2009. [1] It was followed by the sequels Sentinel 2: Earth Defense (2009), [ 2 ] Sentinel 3: Homeworld (2010), [ 3 ] and Sentinel 4: Dark Star (2014).
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.