Project Loon is a network of balloons travelling in the stratosphere and designed by Google to provide internet connectivity worldwide. The balloons float 20 km above the Earth's surface, where winds are steady at 5-20 mph, and each balloon can rise or descend to different wind layers to be steered in desired directions. The balloons are composed of polyethylene envelopes that are inflated to 15m x 12m sizes, solar panels that provide up to 100W of power, and electronic equipment boxes. Users on the ground connect to the balloon network using special antennas that bounce signals between balloons and then down to the global internet. Google aims to use this technology to connect the two-thirds of the world's population that currently

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Computer Department, MSCET, Surat. Page 1
CHEPTER: 1 INTRODUCTION
Flying Hope: Balloon bring Internet to everywhere
Today only 2.7 billion people – a little more than one third of the world’s population
have Internet access. This fact can be attributed to many reasons, but the most important
factor is the scarcity of intensive capital necessary for Internet infrastructure implementation
in many developing areas.
The rapid development in wireless telecommunication industry has boosted another
revolution in data services. Even though there are more than 1 billion Smartphone subscribers
in the world, the majority of them still don’t have data access due to the costly data plan in
many countries. On the other hand, the vast majority of the prices people pay for data plans
go directly towards covering the tens of billions of dollars spent each year building the
infrastructure to deliver the connections. Unless the infrastructure expansion becomes more
efficient, the industry cannot sustainably serve everyone. Bring majority of the global
population into Internet community is one of the greatest challenges of our generation, and
now we see hope from the Google Project Loon – a network of balloons travelling on the
edge of space, designed to provide ubiquitous Internet connectivity free of terrestrial
constrains and with an affordable rate worldwide.
Fig 1.1: % population without internet

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Now the time is 2015, and the Google Project Loon finally matured in technology.
The novel system is ready to enter the market to provide Broadband Internet connectivity.
However, this industry is highly competitive and prospers with various Broadband
technologies. You and your team are hired by Mr. Mike Cassidy, the Project Leader of
Project Loon in Google[X] to develop strategies for a successful launch of the Loon based
Wi-Fi network. After intensive study, now you are going to present a promising solution to
Mr. Cassidy. Before the day of the presentation, you need to write a business letter (no more
than 300 hundred words) to briefly summarize your deliverables in a professional tone. To
ensure a successful presentation, you should address following questions.
What’s the favoured business model for launching the Loon based Internet
connection? Where does the revenue come from? (Household Internet subscriber, contract
with industries and government agencies, reseller of wireless airtime, or simply
advertisement, etc.)
To introduce the Loon based Wi-Fi network into market, what’s the primary targeted
market and consumers in terms of demand and coverage? Which geographical region will
you choose for the debut, and why? Given the atmospheric science background and
technological details, how would you design a network pattern and operation mode to provide
reliable Internet coverage for the region you chose, and also in a cost effective fashion. In
addition, please provide pricing strategy for your primary launching plan.
Please analyze the core competence for the Loon based Internet among the existing
Internet services providers, and reasonably position the technology in the market. According
to your analysis, estimate how many market share it could capture, or can the Loons possibly
exploit new market in terms of service and geographic regions.
As the bellwether in IT industry, what leverages can Google use to foster the Loon
based Internet? (Such as patents, cash flow, integration of Google services with Loon based
Internet, etc.)

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As an outlook, in order to further penetrate the market by Loon base Internet, how should
the Google improve on its product? Please provide stepwise long-term strategy for the Loon
to set a development plan in terms of both marketing and technology.
1.1Background
Project loon is a research and development project being enveloped by Google. It is a
network of balloons travelling on the edge of space, designed to provide ubiquitous Internet
connectivity. The balloons float in the stratosphere, twice as high as airplanes and the
weather. They are carried around the Earth by winds and they can be steered by rising or
descending to an altitude with winds moving in the desired direction. People connect to the
balloon network using a special Internet antenna attached to their building. The signal
bounces from balloon to balloon, then to the global Internet back on Earth.
Fig 1.2: Basic concept behind “Google project loon”

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CHEPTER: 2 PROJECT OVERVIEW
2.1 What is ProjectLoon?
Many of us think of the Internet as a global community. But two-thirds of the world’s
population does not yet have Internet access. Project Loon is a network of balloons traveling
on the edge of space, designed to connect people in rural and remote areas, help fill coverage
gaps, and bring people back online after disasters.
2.2 The technology
Project Loon balloons float in the stratosphere, twice as high as airplanes and the
weather. In the stratosphere, there are many layers of wind, and each layer of wind varies in
direction and speed. Loon balloons go where they’re needed by rising or descending into a
layer of wind blowing in the desired direction of travel. People can connect to the balloon
network using a special Internet antenna attached to their building. The signal bounces from
this antenna up to the balloon network, and then down to the global Internet on Earth.
2.3 Where loon has been
Project Loon began in June 2013 with an experimental pilot in New Zealand, where a
small group of Project Loon pioneers tested Loon technology. The results of the pilot test
have been used to improve the technology, and continued refinements are now being tested in
an ongoing series of research flights in California’s Central Valley.
Project Loon balloons travel around 20 km above the Earth’s surface in the
stratosphere. Winds in the stratosphere are generally steady and slow-moving at between 5
and 20 mph, and each layer of wind varies in direction and magnitude. Project Loon uses
software algorithms to determine where its balloons need to go, then moves each one into a
layer of wind blowing in the right direction.

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By moving with the wind, the balloons can be arranged to form one large
communications network Situated between 10 km and 60 km altitude on the edge of space,
the stratosphere is named after the different strata, or layers, of wind within it. But the
extreme altitude also presents unique engineering challenges:
Air pressure is 1% of that at sea level,
1. temperatures hover around -50°C, and
2. A thinner atmosphere offers less protection from the UV radiation and temperature
swings caused by the sun’s rays.
Fig 2.1: working area of loon in this project

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CHEPTER: 3 LOON DESIGN
The loon is comprised of three parts: an envelope, solar panels and equipment.
 Envelope
 Solar panel
 Equipment
Fig 3.1: Project loon balloon
3.1 Envelope:
The balloon envelope is the name for the inflatable part of the balloon. Project Loon’s
balloon envelopes are made from sheets of polyethylene plastic and stand fifteen meters wide
by twelve meters tall when fully inflated. The balloon powers itself by two renewable
energies, sunlight and wind.
Fig 3.2: Actual image of loon

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Its envelope is made from sheets of Mylar which is a brand for a thin strong polyester
film about 0.076 mm thick. Such super pressure balloons require Mylar since it strongly
keeps from stretching and popping at even high altitude. It is built to resist higher pressures
than a normal weather balloon which reaches usually at an altitude of40 km (25 mi). Inside
envelope, there is another chamber, called bladder. To have the balloon descended, a fan
powered by the solar energy fills the bladder with air to make it heavier. Likewise, the fan
vents air in the bladder, which causes it to rise. The balloon can move up or down a 1.7 km (1
mi) range through the bladder system. This system can help to choose suitable wind currents
in stratosphere. It also releases some air inside out of the envelope to relieve pressure. When
being out of the service, it releases gas from the envelope and descends slowly to the ground.
It rarely happens, but when the balloon drops quickly, it uses the parachute on the top of the
envelope.
3.2 Solarpanel:
Fig 3.3: Solar panel
Each unit’s electronics are powered by an array of solar panels that sits between the
envelope and the hardware. In full sun, these panels produce 100 Watts of power - enough to
keep the unit running while also charging a battery for use at night.

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Fig3.4: Actual image of solar panel which is used in this project
By moving with the wind and charging in the sun, Project Loon is able to power itself
using only renewable energy sources.
3.3 Equipment:
Fig 3.5: Equipment
A small box containing the balloon’s electronic equipment hangs underneath the
inflated envelope, like the basket that is carried by a hot air balloon.
Fig 3.6: This is the first prototype of loon equipment. The parachute is stuffed into the hole in
the centre.

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This box contains circuit boards that control the system, radio antennas to
communicate with other balloons and with Internet antennas on the ground, and batteries to
store solar power so the balloons can operate during the night.
Fig 3.7: What goes up in to atmosphere

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CHAPTER: 4 LOON WORKS
Fig 4.1: Illustrate working of loon
A user with the specialized antenna sends signals via a radio frequency over ISM
bands to a balloon close to him/her. The balloon sends the signals to neigh boring balloons.
Eventually, the signals reach the balloon which is connected to the local Internet. The
wireless mesh network is constantly adjusting as balloons move. Any balloon is able to
connect the Internet to a base station which has Internet connectivity and then receives
Internet data and forwards them via balloons in the sky to the destination. Finally, the balloon
close to the request user broadcasts the data to the grounds via a radio frequency over ISM
bands. The special antenna installed the outside of home receives data and decrypt the data.
The wireless mesh network should be constantly adjusting as balloons move.
It covers an area of an around 40 km (28 mi) diameter circle which is twice the area of
New York City. Thousands of balloons can cover the whole world. Currently, its lifetime is
only a few weeks, but Google anticipates that they can be in the sky hundreds of days in
future.

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4.1 Circuitry and Transmission
Each balloon carries a payload of about 10 kg, including but not limited to radio
antenna, several sensors, altitude control system, processor chips and batteries. Figure is a
possible patent diagram of the circuitry8. The on-board antenna uses a Ubiquities Network
Rocket M2 as a WIFI transceiver. A customized Linux OS is also loaded on a processor chip
to manage and transmit network and location data. The OS is loaded with software that can
log onto remotely via the web.
Figure:
Fig 4.2: Patent circuitry of Loon

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Third iteration of original circuitry for early pilots is shown below in figure
Fig 4.3: Original on-board circuitry for early pilots

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CHAPTER: 5 Loons Connections
Far below the loons, ground stations providing connectivity to backbone Internet can
transmit signals to the balloons up to 65 miles far. The signals would hop forward, from one
balloon to the next, along a chain of up to 5 balloons. Each balloon is networked to one
another within 30 miles with a radio transceiver as in a mesh, designed to ensure signal
reliability. A second transceiver keeps the balloon in contact hundreds of antennas on ground
area about 25 miles in diameter at speeds comparable to 3G. The specialized antennas can be
placed on homes, much like a very small satellite TV receiver. Project Loon currently uses
ISM bands (specifically 2.4 and 5.8 GHz bands) that are available for anyone to use. There is
also a back-up transceiver and a GPS on each balloon, so Google can monitor each balloon's
location.
There are several ground stations with transceivers similar to that on the balloon, but
they are high-powered Ubiquities AirMax/Rocket M5 (operating at 5.8 GHz).10 the Network
is designed as a mesh layout to ensure reliability. A ground station already Connected via
either fibre or other backbone infrastructure to the internet, beams Signal to any nearby
balloon. The first balloon that receives the signal, then Forwards or hops the signal up to 5
other balloons on its same path in sequence, a Distance of about 100 km (62 miles). Figure 9
shows the mesh structure of Loon
Fig 5.1: Mesh network of Loon

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Each balloon then hops the WIFI signal to ground users with coverage of about 1,256km2
(780 sq miles), in context the twice the size of New York City. Users can receive Signal via
Smartphone’s or customized dual-polarization dipole antenna through an Access point.
5.1 Antenna:
Fig 5.2: Antenna use in project loon
It can provide wireless Internet connectivity to ground areas at up to 10Mbps (3G speed).
There are three kinds of communications: balloon-to-balloon network and balloon-to-ground
station or subscribers’ network, balloon to antenna network. It has specialized radio antennas
to support two networks. It currently uses ISM bands specifically 2.4 and 5.8 GHz bands
because they are typically unlicensed radio frequencies around the world, which means
Google is able to avoid negotiating with local governments to purchase specific radio
frequencies. Additionally, this also avoids interferences and reaches much further distances.
Because it does not support Wi-Fi, Smartphone’s such as I-Phone are not able to establish
connections directly to balloons. It requires users to install a specialized antenna the outside
of their home to receive the signal from a balloon near their home and to decrypt the signal.
This way is very similar to the usage of satellites. Figure shows current iteration of the
ground receiver antenna
Fig 5.3: Dual polarized dipole antenna for the receiver

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CHAPTERT: 6 Loons Movements
Project Loon balloons travel around 65,000 feet above the Earth’s surface in the
stratosphere. Winds in the stratosphere are generally steady and slow-moving at between 5
and 20 mph, and each layer of wind varies in direction and magnitude. Due to the wind
properties, balloons can travel along latitude line with a ± 5o latitude range. Project Loon uses
software algorithms to determine where its balloons need to go, then moves each one into a
layer of wind blowing in the right direction. By moving with the wind, the balloons can be
arranged to form one large communications network. The Loon team can access the web-
based control system from any computer or tablet.
6.1 How Loon flies
NAVIGATING WITH THE WIND
Fig 6.1: loon navigation with wind
Winds in the stratosphere are stratified, and each layer of wind varies in speed and
direction. Project Loon uses software algorithms to determine where its balloons need to go,
then moves each one into a layer of wind blowing in the right direction. By moving with the
wind, the balloons can be arranged to form one large communications network.
6.2 Stratosphere
Situated on the edge of space, between 10 km and 60 km in altitude, the stratosphere
presents unique engineering challenges: air pressure is 1% that at sea level, and this thin
atmosphere offers less protection from UV radiation and dramatic temperature swings, which
can reach as low as -80°C. By carefully designing the balloon envelope to withstand these

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conditions, Project Loon is able to take advantage of the stratosphere’s steady winds and
remain well above weather events, wildlife and airplanes.
6.3 Stratospheric Environment
Because the wind below 10km of altitude is not favourable, and because balloons
cannot be positioned even above that troposphere, an algorithm is developed to control
Movement or flow of the balloons based on national wind data, just like the sailing of Boat to
shoreline, adjusting them along right currents in the direction of waves of the Wind.
Figure below shows altitude levels above the atmosphere and somewhat indicate
That theoretically, radio waves behave well in free space, with no interference of Signal, and
power is attenuated by path loss coefficient lower than 2
Fig
Fig 6.2: Stratosphere by altitude

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CHAPTER 7: Current Progress
The Project Loon pilot test began in June 2013 on the 40th parallel south*. Thirty
balloons, launched from New Zealand’s South Island, beamed Internet to a small group of
pilot testers. The experience of these pilot testers is now being used to refine the technology
and shape the next phase of Project Loon.
Fig 7.1: Area covered by pilot test in New Zealand
The journey
Huge thanks to our pilot testers for taking the first step with us. Watch as Charles, a
Project Loon pilot tester, connects to balloon-powered Internet for the first time.
Fig7.2: Project loon pilot tester Charles connect s the balloon provide internet for fist time
Paul, an operations team lead, uses a red sounding balloon to test the wind direction at the
launch site.

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Fig 7.3: Before launch, the balloons are unfurled on top of a protective tarp. This ensures the
delicate envelope isn’t damaged by gravel or spiky grass. The balloon ascends to the
stratosphere.
The Nimmo family was the first to connect to balloon-powered Internet.
Our youngest pilot tester was just a few yare old.
If you are interested in learning how to become a Project Loon pilot tester for a future set of
test launches
Fig 7.4: Path of balloon in pilot test

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7.1 LOON COST
Cost(estimated according to current market prices)
A. Balloon
 Polyethylene plastic envelops manufactured by Raven Aerostat: $4,000
 Helium gas per loon per flight: $2,000 100W
 solar panels (5ft × 5ft): $500
 Navigation control system: $1000
 Equipment box (circuit boards, radio antennae, GPS, weather instruments and
batteries): $12,000
 Re-launch fee for a used balloon: $3,000
B. Ground station connectedto backbone Internet
 Station construction and equipment installation: $1.2 million
 Maintenance: equipment cost is $30,000/year and land cost depends on local market.
C. Need dedicated personnel to conduct regular maintenance and
troubleshooting.
D. Labour costvaries at different location.
E. Balloonlaunching and collecting point
 All the installation, maintenance costs depend on local land cost and human resource
cost.
 Due to properties of wind in the stratosphere, balloon moves along latitude line with a
± 5o latitude range, so please be aware of coverage limitation of balloons from one
balloon station.
F. Antenna for users
 Antenna: $500

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7.2 ADVANTAGES AND DISADVANTAGE
Advantages
 Easy to use
 Speed
 Increase internet usage
 Availability of information
 Education
 Heath and medicines
 Use of renewable resources
 Weather Surveillance
 Collaboration
Disadvantages
 Single time cost is high
 Balloon can work for few months
 Possibilities of Hardware Failure
 Internet privacy
 Not a replacement of satellite
communication.
 International politics

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CONCLUSION
Long distance tracking experiment of loon on 40th parallel south
There are many rules regarding airspace and who controls it, and also disagreements as to
how far (up) such control extends. Floating in the stratosphere means that almost certainly,
Google will always be required to seek permission from any government whose airspace the
balloons float into. In addition, while this project uses unlicensed spectrum, there's no
guarantee that will always be the case. Luckily for Google, approximately 70,000 weather
balloons are launched every year, which may mitigate some, though not all, of the legal and
regulatory issues

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REFERENCES
[1] https://plus.google.com/u/0/+ProjectLoon/posts
[2] http://www.google.com/loon/
[3]http://googleblog.blogspot.in/2013/06/introducing-project-loon.html
[4]http://slideshare.net
[5]http://google.com