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Sentinel-4 is a European Earth observation mission under development to support the European Union Copernicus Programme.It will focus on monitoring of trace gas concentrations and aerosols in the atmosphere to support operational services covering air-quality near-real time applications, air-quality protocol monitoring, and climate protocol monitoring.
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. [6]
[29] [30] From 4 August 2020 to 6 August 2020, at least one RQ-170 participated in a $1.4 million Large Force Test Event at Nellis Air Force Base, in Nevada. [31] It is believed that between 20 and 30 RQ-170s were in service with the USAF as of 2021. At this time, the type continued to be operated by the 30th and 44th Reconnaissance Squadrons.
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).
TEMPO will form part of a geostationary constellation of pollution-monitoring assets, along with the planned Sentinel-4 from ESA and Geostationary Environment Monitoring Spectrometer (GEMS) from South Korea's KARI. [8] On 3 February 2020, Intelsat announced that the Intelsat 40e satellite will host TEMPO.
Sentinel was a proposed US Army anti-ballistic missile (ABM) system designed to provide a light layer of protection over the entire United States, able to defend against small ICBM strikes like those expected from China, or accidental launches from the USSR or other states. The system would have seventeen bases, each centered on its Missile ...
Copernicus is the Earth observation component of the European Union Space Programme, managed by the European Commission and implemented in partnership with the EU member states, the European Space Agency (ESA), the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), the European Centre for Medium-Range Weather Forecasts (ECMWF), the Joint Research Centre (JRC ...
The Sentinel satellites provide data for the operational provision of geo-information products and services throughout Europe and the globe. EDRS provides the data relay services for the Sentinel satellites since 2016, facilitating a rapid downlink of large volumes of data (including imagery, voice, and video).