Sentence examples for tracking spacecraft from inspiring English sources
(The United Nations already oversees a space registration convention, which requires countries to list launches, orbits and the purpose of missions. But it stops tracking spacecraft once they've been launched).
The topics include space flight history, orbital mechanics, orbit perturbations, near-Earth and interplanetary mission analysis, orbit determination and satellite tracking, spacecraft maneuvers and attitude control, launch, and entry dynamics.
These important experimental tests of the general of relativity would not have been possible without the capability of launching instruments into space, accurately tracking spacecraft with dual frequency transponders, landing spacecraft on Mars, placing retroreflectors on the surface of the moon, and making precise range measurements to those retroreflectors.
Tilley, who lives in British Columbia, had single-handedly located the weather-tracking spacecraft IMAGE, which NASA launched in 2000 and lost contact with five years later.
It was used to launch research rockets into the upper atmosphere, and to track spacecraft far beyond, including the Apollo flights to the moon.
However, the slowly moving, single-beam nature of the current EISCAT radars makes it difficult to track spacecraft or debris objects.
The Narrow Bandwidth VLBI (NBV) technique is utilized to track spacecrafts in Japanese lunar exploration.
Each DSN site has a huge 70-metre (230ft) wide dish antenna capable of tracking a spacecraft billions of miles from Earth.
It also requires radio spectrum to carry signals used for everything from tracking a spacecraft to sending a self-destruct command if something goes wrong.
Furthermore, by introducing a nonsmooth feedback function, a new class of nonlinear controllers for the attitude tracking of spacecraft is developed.
Space agencies in the US, Europe and Russia have been tracking the spacecraft, but its tumbling motion, speed and altitude mean there are uncertainties over where and when it will come down.
