Retrograde Orbit In Satellite Communication

In addition retrograde orbits vastly increase the potential for space debris any possible collision now occurs at much higher velocities with larger spreads of debris.

Retrograde orbit in satellite communication. In addition the coverage ability of another special orbit distant retrograde orbit dro is analysed for the first time in this study. The method includes arranging a first and a second plurality of threat sensing satellites in earth orbit. Sun is at a constant angle to the orbit plane. Multiple satellites may be used and the orbits thereof may be circular or elliptical.

In this embodiment the system includes one or more satellites. This is desired for weather or photo reconnaissance satellites since they will be photographing the ground track at the same local time each orbit lighting constant shadows consistent length etc. Retrograde near polar orbits like that one are typically designed to be sun synchronous i e. Triton is the largest of neptune s 13 moons.

A four satellite constellation can cover nearly 100 of the whole lunar surface. Artificial satellites destined for low inclination orbits are usually launched in the prograde direction since this minimizes the amount of propellant required to reach orbit by taking advantage of the earth s rotation an equatorial launch site is optimal for this effect. In 1954 donald keyhoe claimed found a satellite was found to orbiting earth. The first plurality is selected to have a first prograde orbit plane with a first inclination angle between about 30 to 70 with respect to the earth s equator and an argument of perigee.

It is found that three satellites on dros can cover 99 8 of the lunar surface with coverage gaps at polar caps. A method for sensing and monitoring icbm threats using a constellation of earth orbiting satellites. Nevertheless a satellite in retrograde orbit could pose a major hazard to other satellites especially if it was placed in the clarke belt where geostationary satellites orbit. Inclined at approximately 180 to the equator.

It is unusual because it is the only large moon in our solar system that orbits in the opposite direction of its planet s rotation a retrograde orbit. This risk highlights the fragility of communication satellites and the importance of international cooperation in preventing space collisions due to negligence or malice. Satellite orbit with inclination of more than 90 degrees is called retrograde orbit when the satellite moves in a direction opposite to the rotational motion of the earth. However israeli ofeq satellites are launched in a westward retrograde direction over the mediterranean to ensure that.

Communications satellites are usually in geostationary orbits and scientific satellites are put in whatever orbit is needed for their particular experiments. A satellite and an arrangement for placing the satellite in a retrograde orbit i e. Aside from the fact that there were only a few artificial satellites in orbit at the time none would have been in retrograde orbit. Scientists think triton is a kuiper belt object captured by neptune s gravity millions of years ago.

The invention is well suited for an illustrative satellite inspection application.