2. CONTENTS:
INTRODUCTION
EXISTING TECHNOLOGY
LAYERS OF ATMOSPHERE
STRATELLITES
CONSTRUCTION AND WORKING
SATELLITE V/S STRATELLITE
ADVANTAGES
DISADVANTAGES
APPLICATIONS
CONCLUTION
3. INTRODUCTION
Wireless communication is simply data communication
without the use of direct cable links. This may involve
cellular telephone, two-way radio, fixed wireless
(broadband wireless), laser (free space optics) or satellite
communication systems.
Mobile wireless technologies are going to act as glue
towards bringing together the wired and wireless to share
and distribute information seamlessly across each other’s
areas of reference.
My topic takes this to a step ahead to the present
communication
4. Existing Technology
Satellites:
Satellite is an artificial object which has been intentionally placed into higher orbits.
Satellite communication is the backbone of wireless communications and global positioning
systems.
Satellite in orbit of the planet cover huge footprint territories
Satellites come in 4 types:
I.Geo-stationary
II.Sun-synchronous
III.Geosynchronous
IV.Low-earth orbit
5. Existing Technology
Advantages of Satellite communication:
•High Bandwidth
•Coverage over a large geographical area
•Can be cheaper over long distances
Drawbacks of satellites:
Two main drawbacks of satellites.
The first is signal latency, which can cause problems in establishing broadband links.
Most telecommunications satellites are in geostationary orbit to remain above a certain point on
the Earth’s surface.
That orbit, however, is 22,240 miles above the Earth, which means that a signal going up to the
satellite(uplink) and back to the Earth(downlink) travels nearly 45,000 miles, which equates to about
a quarter of a second delay.
Even users of satellite voice links notice the delay.
6. Drawbacks of satellites:
The second drawback is that satellites are in space,
requiring expensive space launches, an additional level of regulation by
national space authorities, and an orbital allotment by the International
Telecommunications Union (ITU).
Also they include noise and interference due to large distance between
transmitter and receiver units.
9. Stratellites
A stratellite is similar to a satellite, but
is stationed in the stratosphere rather
than on the orbit.
01
Stratellite is a “High Altitude
Airship(HAA)”, which is positioned
approximately 13 miles above the
earth, which provides the benefits of
a satellite like remote sensing,
navigation and communication
02
Each Stratellite will have clear line-of-
site communications capability to an
entire major-metropolitan area as
well as being able to provide
coverage across major rural areas.
03
10. The Stratellite is designed to carry certain payloads into the
Stratosphere determined by the requirements of the customer.
A single unit could send broadband, mobile phone and digital
television and radio signals to a large area. The ‘unmanned’ Stratellite
would be powered by solar cells and propelled by electric motors.
12. Construction
Outer layer is made of spectra is a fabric used in bullet
proof vests.
Filled with a mixture of helium and air
Consists of:
Propeller
Solar cells
Regenerative fuel cells
Helium gas bag
Transponder
Hybrid electric motors
Wireless communication and rador devices
13. Working
Inside is filled with Helium gas,
as it is inert gas not flammable.
The Helium gas expands
pushing out air and lifting the
airship.
Uses solar cells sprayed on
their surface to generate
electricity.
The generated electricity drives
propellers that work with GPS
technology to keep the
stratellite stationary.
14.
15. Advantages
Decreases Signal latency
Less expensive to launch
Service an area of 300,000 square-miles
Two-way high speed data communication
High speed broad-band access even in remote area.
For a country two stratellites are enough instead of thousands of
towers
16. Stratellites will carry over 20,000 pounds of radars and
other remote imaging equipment, navigational aids,
and telecommunications relays.
Stratellites are planned to remain on station for a year
at a time and will cost a one fifth as much as a
comparable satellite
17. Disadvantages
May lead to traffic problems in stratosphere.
Would require efficient ground control and maintenance.
So far, this technology remains non-commercialized, and is
in a prototype stage for further developments
18. Applications
In environmental disasters telecommunication breaks down within
seconds, Re-installation of the infrastructure takes weeks or months.
The Stratellite can be used as a floating mobile telecommunication station
for all telecommunication purposes and the transmission of temporary
data communication, telecommunication and Tvprograms as well as long-
term missions over metropolitan cities.
The Stratellite will allow subscribers to easily communicate in "both
directions" using readily available wireless devices.
In addition to voice and data, proposed telecommunications uses include
cellular, 3G/4G mobile, MMDS, paging, fixed wireless telephony, HDTV,
real-time surveillance and OTHERS.
Application case : “Google’s Project Loon”
19. Conclusion
Probably the most "far out there" concept in this roundup, Stratellite is actually
much closer to reality than what you may think.
Once the defects of Stratellites have been overcome and become more reliable,
they play a vital role in the future generation wireless communication.
This is a promising technology that could combine the best of Satellite and wired
Internet - fast with low latency and hugely widespread, at least in theory.
