For instance it is the most common way to transfer satellites into geostationary orbit, after first being " parked " in low earth orbit.

For example, for ground stations at latitudes of φ = ± 45 ° on the same meridian as the satellite, the time taken for a signal to pass from Earth to the satellite and back again can be computed using the cosine rule, given the geostationary orbital radius r ( derived below ), the Earth's radius R and the speed of light c, as

For synchronous satellites orbiting Earth, this is also known as a geostationary orbit.

For areas close to the North ( and South ) Pole, a geostationary satellite may appear below the horizon.

For the geostationary transfer orbit we have

For comparison, geostationary satellites orbit Earth at 35, 790 km.

For geostationary spacecraft the inclination change caused by the gravitational forces of Sun / Moon must be counteracted to a rather large expense of fuel as the inclination should be kept sufficiently small for the spacecraft to be tracked by a non-steerable antenna.

For geostationary spacecraft the eccentricity must be kept sufficiently small for a spacecraft to be tracked with a non-steerable antenna.

For satellites in geostationary orbit and geosynchronous orbits, the graveyard orbit is a few hundred kilometers above the operational orbit.

For astrodynamics reasons, cheap spacecraft travel to other planets is only practical within certain time windows.

For instance, the motion of a spacecraft, regarding its orbit and attitude ( rotation ), is described by the relativistic theory of classical mechanics, while the analogous movements of an atomic nucleus are described by quantum mechanics.

For instance, if limited onboard power fed to its engine was the dominant limitation on how much payload a hypothetical spacecraft could shuttle ( such as if intrinsic propellant economic cost was minor from usage of extraterrestrial soil or ice ), ideal exhaust velocity would rather be around 62. 75 % of total mission delta v if operating at constant specific impulse, except greater optimization could come from varying exhaust velocity during the mission profile ( as possible with some thruster types, including mass drivers and variable specific impulse magnetoplasma rockets ).

For example, a ramjet might collect 1 gram of incoming ions per second from interstellar space beyond the heliopause, at a velocity of 50 km / s relative to the ramjet driven spacecraft.

For orbital spaceflights, spacecraft enter closed orbits around the Earth or around other celestial bodies.

For spacecraft near the Sun, solar panels are frequently used to generate electrical power.

For missions beyond low Earth orbit NASA is building the Space Launch System and the Orion spacecraft.

For the Mercury, Gemini, and Apollo spacecraft, such communications blackouts lasted for several minutes.

For the Apollo 13 mission, the blackout was much longer than normal because the flight path of the spacecraft was unexpectedly at a much shallower angle than normal.

For a rocket the payload can be a spacecraft launched with the rocket, or in the case of a ballistic missile, the warheads.

For spacecraft carrying instruments for which an altitude of 36000 km is suitable the Geostationary orbit is sometimes the preferred choice.

For example, nuclear pulse propulsion is a form of spacecraft propulsion that would use nuclear explosives to provide impulse to a spacecraft.

* For communications between spacecraft, including elements of a satellite constellation

For Salyut, small modifications had to be made to the docking port of the OPS to accommodate Soyuz spacecraft in addition to TKS spacecraft.

For this reason, reaction wheels are often used to aim spacecraft with cameras or telescopes.

For launches above low Earth orbit ( LEO ), the actual launch time can be somewhat flexible if a parking orbit is used, because the inclination and time the spacecraft initially spends in the parking orbit can be varied.

For example, consider a spacecraft travelling from the Earth to Mars.

For example, the capacity ( separated spacecraft mass ) of the Delta IV Heavy:

For example, if two spacecraft are in the same circular orbit and wish to dock, unless they are very close, the trailing craft cannot simply fire its engines to go faster.

For example, a dish antenna on a spacecraft is a high-gain device that must be pointed at the planet to be effective, whereas a typical Wi-Fi antenna in a laptop computer is low-gain, and as long as the base station is within range, the antenna can be in any orientation in space.

For communicating with the Deep Space Network, the spacecraft transmitted data across the x-band using a 0. 6-meter parabolic high-gain antenna, medium-gain antenna ( MGA ) and low-gain antennas ( LGA ) depending on mission phase, and a 15-watt transponder design originally intended for the Cassini spacecraft.

For storing data when the spacecraft was unable to communicate with Earth, the processor card was able to store 128-megabytes, 20 % of which was occupied by the flight system software.

For spacecraft in a halo orbit around a Lagrangian point stationkeeping is even more fundamental as such an orbit is unstable ; without an active control with thruster burns the smallest deviation in position / velocity would result in the spacecraft leaving the orbit completely.

For example, " aloin " is derived from Aloe vera and Aloe ferox and has important medical uses ( e. g. as a laxative and in the treatment of burns ) as well as cosmetic uses ( e. g. in skin and hair products ).

For example, sewage sludge has a low but significant calorific value, and burns to give ash containing minerals useful in the clinker matrix.

For example, while burning an area of fairly thick forest and thus turning it into a more open, grassy environment might reduce the viability of a large browser ( an animal that eats leaves and shoots rather than grasses ), the reverse could also be true: removing the browsing animals ( by eating them, or by any other means ) within a few years produces a very thick undergrowth which, when a fire eventually starts through natural causes ( as fires tend to do every few hundred years ), burns with greater than usual ferocity.

For this reason, when the human body comes in contact with high power RF currents it can cause superficial but serious burns called RF burns.

For large scars and particularly large burns, pressure garments may be worn.

For this reason clearfelling ( as opposed to selective logging methods ) are justified by the timber industry by claiming it is required for the successful germination and growth of seedlings, despite such intense burns not occurring naturally and the cleared land requiring reseeding from seed collected elsewhere.

For example, coal burns in a fireplace in the presence of oxygen, but it does not when it is stored at room temperature.

For example a 4x4 burns for 4 seconds at a height of 4 feet.

For example, when hydrogen burns:

For cards marked as " infernal ," during his or her untap phase, a Methuselah who controls an infernal minion burns one pool or taps that infernal minion.

For the burning of slash, waste materials left over from logging, there are several types of controlled burns.

For example, if Rachel contracts to pay Joey $ 1000 to paint her house on October 1, but the house burns to the ground before the end of September, Rachel is excused from her duty to pay Joey the $ 1000, and he is excused from his duty to paint her house ; however, Joey may still be able to sue for the unjust enrichment of any benefit conferred on Rachel before her house burned down ( e. g. if Rachel paid Joey in advance, then the amount of payment might be a compensatory injury ).

For exercise regimens of comparable duration and intensity, aerobic exercise burns more calories during the exercise itself, but the difference is partly offset by the higher increase in caloric expenditure that occurs during the EPOC phase after anaerobic exercise.

* For boils or burns, the kohen declares it merely a צרבת ( tzarevet, " scar ") and there are no further examinations ( Leviticus 13: 23 and 28 )

For this reason, it may be dangerous to stand close to high-power microwave antennas such as those used for broadcasting over long distances ( tens of miles ); a person near such antennas may experience severe penetrating burns, which ( in the worst cases ) may include serious burn injury to internal organs.

For long burns, the valves affected by the short would be opened only after ten seconds, and closed before the end of the burn.