Satellite tethers tend to be relatively cheaper than spacecraft using rocket engines depending on the objective of the mission and altitude.
Types of satellites in space.
Since the 1960s more than 26 000 satellites have been launched for both military and civilian purposes.
63 of current operational satellites are at a low orbit level 2000 km 6 are at medium orbit level 20000 km 20 are at the geostationary orbit level 36000 km and rest 2 at elliptic level 36000 km.
Pisacane 2005 the molniya orbit is highly eccentric.
There are two types of weather satellites.
Space stations and human spacecraft in orbit are also satellites.
As of december 2018 usa designations have been assigned to 290 space missions.
There are different types of tether satellites including skyhooks format flying tethers momentum exchange tethers and electrodynamic tethers.
Polar orbiting and geostationary.
Satellites can operate by themselves or as part of a larger system a satellite formation or satellite constellation.
Low earth orbits leo leo satellites occupy a region of space from about 111 miles 180 kilometers to 1 243 miles 2 000 kilometers above earth.
Russian communications satellites and the sirius radio satellites currently use this type of orbit.
The satellite moves in an extreme ellipse with the earth close to one edge.
It is comparable to the soviet russian kosmos designation.
Satellites moving close to the earth s surface are ideal for making observations for military purposes and for collecting weather data.
Satellites are a manmade construction which are launched into orbiting patterns in space.
Adapted from fundamentals of space systems by vincent l.
These satellites are placed in space at different altitudes and they are facing different planets depending on the applications.
Both satellite systems have unique characteristics and produce very different products the two polar orbiting satellites in their north south orbits observe the same spot on the earth twice daily once during the daylight and once at night.