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For Earth this means a period of just under 12 hours at an altitude of approximately 20,200 km (12,544.2 miles) if the orbit is circular. [16] Molniya orbit: A semi-synchronous variation of a Tundra orbit. For Earth this means an orbital period of just under 12 hours. Such a satellite spends most of its time over two designated areas of the ...
NASA Earth science satellite fleet as of September 2020, planned through 2023. Earth observation satellite missions developed by the ESA as of 2019. Earth observation satellites are Earth-orbiting spacecraft with sensors used to collect imagery and measurements of the surface of the earth. These satellites are used to monitor short-term weather ...
Geosynchronous orbit. A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day). The synchronization of rotation and orbital period means that, for an observer on Earth's surface, an object in ...
A geostationary orbit, also referred to as a geosynchronous equatorial orbit[a] (GEO), is a circular geosynchronous orbit 35,786 km (22,236 mi) in altitude above Earth's equator, 42,164 km (26,199 mi) in radius from Earth's center, and following the direction of Earth's rotation. An object in such an orbit has an orbital period equal to Earth's ...
Chandra is an Earth satellite in a 64-hour orbit, and its mission is ongoing as of 2024. Chandra is one of the Great Observatories , along with the Hubble Space Telescope , Compton Gamma Ray Observatory (1991–2000), and the Spitzer Space Telescope (2003–2020).
The groundbreaking event, set to kick off early on the crew’s third day in space, is expected to take place while the crew is orbiting about 435 miles (700 kilometers) above Earth.
The ISS maintains an orbit with an average altitude of 400 kilometres (250 mi) [11] and circles the Earth in roughly 93 minutes, completing 15.5 orbits per day. [ 12 ] The ISS programme combines two prior plans to construct crewed Earth-orbiting stations: Space Station Freedom planned by the United States, and the Mir-2 station, planned by the ...
It communicates through the NASA Deep Space Network (DSN) to receive routine commands and to transmit data to Earth. Real-time distance and velocity data are provided by NASA and JPL. [4] At a distance of 164.0 AU (24.5 billion km; 15.2 billion mi) from Earth as of September 2024, [4] it is the most distant human-made object from Earth. [5]