Again, it is a matter of which one of you is in the stronger position.
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Since landlords will want to raise the rent at the end of the initial agreed period, this will need to be addressed in advance. If you can get an option to renew at a predetermined fixed price, as opposed to renewing at the fair market price, you will likely save money when the initial term of the lease ends, especially if office rents have escalated. A short lease with one or more options to renew gives you some flexibility.
Typically, you have a certain time period before the end of the initial lease term in which you can notify the landlord in writing that you want to renew the lease at the predetermined amount.
There may be an additional fee, also agreed upon in the initial lease for exercising your right to stay. Generally, with the exception of the increase in rent, other terms of the initial lease will carry over into the renewal period. Another option you might include is the option for additional space. Being able to expand is key for a growing business. A landlord who sees the potential of having an important tenant that may attract other businesses, especially in a mall or similar retail situation, may be more inclined to grant you an option for additional space.
You will need to examine and negotiate the terms for renting such extra space and make sure the space is suitable to your business needs.
The option for additional space may state that you will expand at the same per square foot rate that you are currently paying, at a fixed rate of increase or at the fair market rate at the time of the expansion. This will need to be determined when working out the initial option agreement. Such an option can only be included if the landlord can reserve or make such space available. The rest have re-entered Earth's atmosphere and disintegrated, or survived re-entry and impacted the Earth.
The SSN tracks objects that are 10 centimeters in diameter or larger; those now orbiting Earth range from satellites weighing several tons to pieces of spent rocket bodies weighing only 10 pounds.
About seven percent are operational satellites i. There are three basic categories of non-military satellite services: Fixed satellite services handle hundreds of billions of voice, data, and video transmission tasks across all countries and continents between certain points on the Earth's surface. Scientific research satellites provide meteorological information, land survey data e. The first satellite, Sputnik 1 , was put into orbit around Earth and was therefore in geocentric orbit. By far this is the most common type of orbit with approximately 1,  artificial satellites orbiting the Earth.
Geocentric orbits may be further classified by their altitude, inclination and eccentricity. Low Earth orbit is any orbit below 2, km. The general structure of a satellite is that it is connected to the earth stations that are present on the ground and connected through terrestrial links. The satellite's functional versatility is imbedded within its technical components and its operations characteristics.
Looking at the "anatomy" of a typical satellite, one discovers two modules. The bus module consists of the following subsystems:. The structural subsystem provides the mechanical base structure with adequate stiffness to withstand stress and vibrations experienced during launch, maintain structural integrity and stability while on station in orbit, and shields the satellite from extreme temperature changes and micro-meteorite damage.
The power subsystem consists of solar panels to convert solar energy into electrical power, regulation and distribution functions, and batteries that store power and supply the satellite when it passes into the Earth's shadow. Nuclear power sources Radioisotope thermoelectric generator have also been used in several successful satellite programs including the Nimbus program — The thermal control subsystem helps protect electronic equipment from extreme temperatures due to intense sunlight or the lack of sun exposure on different sides of the satellite's body e.
The attitude and orbit control subsystem consists of sensors to measure vehicle orientation, control laws embedded in the flight software, and actuators reaction wheels, thrusters. These apply the torques and forces needed to re-orient the vehicle to a desired attitude, keep the satellite in the correct orbital position, and keep antennas pointed in the right directions. The second major module is the communication payload, which is made up of transponders.
A transponder is capable of:. When satellites reach the end of their mission this normally occurs within 3 or 4 years after launch , satellite operators have the option of de-orbiting the satellite, leaving the satellite in its current orbit or moving the satellite to a graveyard orbit. Historically, due to budgetary constraints at the beginning of satellite missions, satellites were rarely designed to be de-orbited.
One example of this practice is the satellite Vanguard 1. Instead of being de-orbited, most satellites are either left in their current orbit or moved to a graveyard orbit. This list includes countries with an independent capability to place satellites in orbit, including production of the necessary launch vehicle.
This list does not consider those numerous countries, but only lists those capable of launching satellites indigenously, and the date this capability was first demonstrated. The list includes the European Space Agency , a multi-national state organization, but does not include private consortiums. A few other private companies are capable of sub-orbital launches. While Canada was the third country to build a satellite which was launched into space,  it was launched aboard an American rocket from an American spaceport.
The same goes for Australia, who launched first satellite involved a donated U. Redstone rocket and American support staff as well as a joint launch facility with the United Kingdom. Both Chile and Belarus used Russian companies as principal contractors to build their satellites, they used Russian-Ukrainian manufactured rockets and launched either from Russia or Kazakhstan. In recent times [ timeframe? For testing purposes, satellites in low earth orbit have been destroyed by ballistic missiles launched from earth.
Russia, the United States and China have demonstrated the ability to eliminate satellites. Due to the low received signal strength of satellite transmissions, they are prone to jamming by land-based transmitters. Such jamming is limited to the geographical area within the transmitter's range.
GPS satellites are potential targets for jamming,   but satellite phone and television signals have also been subjected to jamming. Also, it is very easy to transmit a carrier radio signal to a geostationary satellite and thus interfere with the legitimate uses of the satellite's transponder.
It is common for Earth stations to transmit at the wrong time or on the wrong frequency in commercial satellite space, and dual-illuminate the transponder, rendering the frequency unusable. Satellite operators now have sophisticated monitoring that enables them to pinpoint the source of any carrier and manage the transponder space effectively.
From Wikipedia, the free encyclopedia. This article is about artificial satellites. For natural satellites, also known as moons, see Natural satellite. For other uses, see Satellite disambiguation. For the electric light used to simulate moonlight, see moonlight tower. United States Space Surveillance Network.
Attitude control and Spacecraft propulsion. Timeline of first orbital launches by nationality. This section needs expansion. You can help by adding to it. Timeline of first satellites by country. Satellite crop monitoring Satellite Internet access Satellite navigation Satellite phone Satellite radio Satellite television. Retrieved 27 Sep Marshall Space Flight Center. Archived from the original on Science-fiction, the Early Years. Kent State University Press.
Retrieved 6 March Rand Corporation, Santa Monica 12 February K Kallmann and W. Rand Corporation, Santa Monica 8 June Archived from the original on 1 February Archived from the original PDF on Archived from the original PDF on 8 April Communication Technology Update ninth ed.
National Academy of Science. Union of Concerned Scientists. Retrieved 27 September Rockets and Graveyard Orbits". Forecast for Space Junk Reentry. Archived from the original on 22 April University of Toronto Institute for Aerospace Studies. Archived from the original on 10 March