Synchronous orbit: An orbit where the satellite has an orbital period equal to the average rotational period (earth's is: 23 hours, 56 minutes, 4,091 seconds) of the body being orbited and in the same direction of rotation as that body.
Synchronous Replication. Real-time replication requires commitment of data transfer to the replicated server before releasing the client application on the primary server.
Synchronous: Data transmitted along a communication line in a continuous stream via serial or parallel lines according to an established timing sequence.
Geosynchronous Orbit
A specific orbit around where a satellite rotates around the earth at the same rotational speed as the earth.
Sun-Synchronous Orbit An orbit that always passes over the earth at the same local sun time.
T
Tolerance A numerical value representing the acceptable error range a feature will have from its actual point found on earth.
Synchronous Data-Like Control; System Development Life Cycle
SDMG
Direction des Mines et de la Geologie (Senegal) ...
[data editing] Not synchronous; that is, not occurring together or at the same time.
real-time Refers generally to systems that respond (almost) immediately or synchronously to external events.
Once evaluated, the animal objects must be able to interact with one another both synchronously and asynchronously.
The SNAP Lab has been conducting pseudolite research for many years, and has experimented with pseudolites in nonsynchronous and synchronized modes for a variety of applications, using both the GPS L1 frequency as well as the 2.
Space flight increased knowledge of the rest of the universe and allowed for global real-time communications via geosynchronous satellites.
RADARSAT will assume a sun-synchronous orbit at approximately 800 km. The repeat cycle will be every 24 days, but with a change in the look angle, data can be collected for a specific site every 3 days.
All Landsat satellites have flown in a Sun-synchronous orbit. This allows the satellite to maintain a constant orientation between the Earth and the Sun. As a result, the mean Sun time at each point in the orbit remains fixed.
Landsats 4 and 5 were launched into similar orbital geometries as 1,2, and 3 (repetitive, circular, sun synchronous and near-polar), although the orbit altitude was lowered from 900 to 705km.
The satellites themselves are in predictable, continuous, non-geosynchronous orbit, far out in space.
The sensor orbit is sun synchronous with a 26 day nadir and 1-5 days off nadir temporal resolution. The sensor also has the capability to produce full scene stereo images which can be used to create topographic maps.
The Russian Global Navigation Satellite System is currently a constellation of 53 spacecraft deployed in nearly semi-synchronous orbits. The Phase I constellation was established in 1990; a 21-spacecraft constellation is the operational goal.
 See also: Information, Area, Image, Satellite, Environment
  
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