24-08-2013, 03:54 PM
SEMINAR ON REVIEW OF SMALL SATELLITES
SMALL SATELLITES.pptx (Size: 554.36 KB / Downloads: 55)
OVERVIEW OF SATELLITES
It is an artificial satellite which has been placed into orbit by human endeavor.
Moon is natural satellite of Earth.
The world’s first artificial satellite , the SPUTNIK 1, was launched by the Soviet Union in 1957.
Since 1957, more than 1000 satellites have been launched into orbit around the Earth.
They originate from more than 50 countries and have used satellite launching capabilities of ten Nations.
They are used for many purposes such as: military and civilian Earth observation satellites, communication satellites, navigation satellites, weather satellites and research satellites.
Satellites are usually semi-independent computer-controlled systems.
SMALL SATELLITES
Miniaturized satellites or small satellites are artificial satellites of low mass and size, usually under 500 kg.
Educational tool for learning about space missions.
Currently the lowest tier of spacecraft technology.
New inexpensive way to design, launch and track small scale satellites
They are smaller, simpler, cheaper and more effective than large counterparts in some cases.
It reduces the cost: the heavier satellites require large rockets with greater thrust which increase the cost.
NEED OF SMALL SATELLITE
It is having low cost
New inexpensive way to design, launch, and track small-scale satellites
It is having a large number of satellites of small size
It can be quickly assembled
Constellations for low data rate communications
In-orbit inspection of larger satellites
MICRO SATELLITE or MICROSAT
It is usually applied to an artificial satellite with a wet mass of 10 to 100 kg
Sometimes they work in formation to form a bigger satellite.
Except the mass, size is also important
Examples: Astrid-1 and Astrid-2 and Microsat launch vehicle
In July 2012, Virgin Galactic announced Launcher one, an orbital launch vehicle designed to launch payloads of 100kg which begin in 2016
In December 2012,DARPA announced that the DARPA ALASA program is intending to release a "constellation of 24 micro-satellites (~20 kilograms (44 lb) range) each with 1-meter imaging resolution.
Manufacturers include Space Dev and Surrey Satellite Technology Ltd.
SMALL SATELLITES
COMPARED TO LARGER SATELLITES
Typically weighs less than 200 kg
Has shorter mission lifetime
Quickly assembled by smaller team
Less expensive
Less mass → less cost to orbit
Can piggy-back on larger launches
Can be launched in multiples
Easier to engineer
Newer technology can be used
Reliability achieved by simplicity rather than redundancy
FUTURE ASPECTS OF SMALL SATELLITES
LAUNCHER ONE was projected to launch in 2016.
US ARMY is developing SWORDS(Soldier War fighter Operationally Responsive Deployer for Space) and expected a test flight during this summer 2013.
Kicksat, plans to launch 250 of the “cracker-size satellites” into low-Earth Orbit on a SpaceXFalcon 9 launch vehicle in late 2013 .
During the 27th year of the AIAA/USU Conference on small satellites on August 10-15, 2013 which aim to provide awareness of space missions through small satellite constellations, including the technical challenges and enabling technologies, for building, testing, launch and operations.
CONCLUSION
Small satellites are the future of satellites.
It reduces cost and mass and provide other benefits.
It gives us about all information as given by large satellites.
They can work in a group to gather information from large satellites.
It provides useful practices in universities and colleges.
It can be set in space by small industries also.
We study about the working and parts of small satellites.
How it differ from larger satellites and its types.