Bangabandhu satellite-1

1. North Western University, Khulna
Radar & Satellite Communication
EEE-3307
Presentation Topic :
Bangabandhu Satellite-I
Presented by
Md. Mozammel Haque
ID No: 20183026021

2. Presentation Outline
1 What is A Satellite
2 Types of satellite orbits
3 Satellite Communication
4 Introduction of Bangabandhu Satellite 1
5 Bangabandhu Satellite-1 Mission
6 Technical Information About Bangabandhu Satellite-1
7 Multiple access in satellite networks
8 Block diagram of satellite system
9 Satellite communication earth station
10 Bangabandhu-1 to open doors for massive opportunities
11 Bangabandhu-1 to open doors for massive opportunities (cont..)
12 Bangabandhu-1 to open doors for massive opportunities (cont..)
13 Advantage of satellite communication
14 Disadvantage of satellite communication
15 Bangabandhu satellite project wins int'l award

3. What is a Satellite?
A satellite is an object that moves around a larger
object. Earth is a satellite because it moves around
the sun. The moon is a satellite because it moves
around Earth. Earth and the moon are called
"natural" satellites. But usually when someone says
"satellite," they are talking about a "man-made"
satellite. Man-made satellites are machines made by
people. These machines are launched into space and
orbit Earth or another body in space. There are
thousands of man-made satellites. Some take
pictures of our planet. These pictures help scientists
learn about Earth, the solar system and the universe.
Other satellites send TV signals and phone calls
around the world.

4. Types of satellite orbits
1. Low earth orbit (LEO)
2. Medium earth orbit (MEO)
3. Geostationary orbit (GEO)
4. Highly Elliptical orbit (HEO)

5. Satellite Communication
Two Stations on Earth want to
communicate through radio broadcast
but are too far away to use
conventional means. The two stations
can use a satellite as a relay station
for their communication One Earth
Station sends a transmission to the
satellite. This is called a Uplink. The
satellite Transponder converts the
signal and sends it down to the
second earth station. This is called a
Downlink.

6. Introduction Of Bangabandhu
Satellite 1
Bangladesh Communication Satellite Company
Limited was established on 15 August 2017.
Bangabandhu Communication satellite is the
first satellite of Bangladesh. The Bangabandhu
Satellite-1 (BANGABANDHUSAT- 1 or BS-1)
is the first Bangladeshi geostationary
communications and Broadcasting Satellite. It
was launched on 11 May 2018. The project is
being implemented by Bangladesh
Telecommunication Regulatory Commission
(BTRC) and was the first payload launched by
a Falcon 9 Block 5 rocket of SpaceX.

7. Bangabandhu Satellite 1 Mission
Mission Overview SpaceX is targeting launch of Bangabandhu
Satellite-1 on Friday, May 11 from Launch Complex 39A (LC-
39A) at NASA’s Kennedy Space Center, Florida. The launch
window opens at 4:14 p.m. EDT, or 20:14 UTC, and closes at
6:21p.m. EDT or 22:21 UTC. Bangabandhu Satellite-1 will be
deployed into a geostationary transfer orbit (GTO) approximately
33 minutes after launch. A backup launch window opens on
Saturday, May 12 at 4:15 p.m. EDT, or 20:15 UTC, and closes at
6:21 p.m. EDT, or 22:21 UTC. The Bangabandhu Satellite-1
mission will be the first to utilize Falcon 9 Block 5, the final
substantial upgrade to SpaceX’s Falcon 9 launch vehicle. Falcon 9
Block 5 is designed to be capable of 10 or more flights with very
limited refurbishment as SpaceX continues to strive for rapid
reusability and extremely high reliability. Following stage
separation, SpaceX will attempt to land Falcon 9’s first stage on
the “Of Course I Still Love You” droneship, which will be
stationed in the Atlantic Ocean.

8. Technical Information About
Bangabandhu Satellite 1
Orbital Position- 119.1° E
Transponders- Total 40 (14 C-band, 26 Ku-
band)
Platform- SPACEBUS 4000 B2
Solar Array- 3-panels per wing with GaAs
cells
Batteries- Li-Ion Mono-battery
Propulsion- Full chemical Launch
Mass- > 3600 Kg on Falcon 9
Mission Life- Minimum 15 Years
Design Life- 18 years

9. Multiple Access In Satellite
Networks
Basic Multiple Access Schemes:
Frequency Division bandwidth:
- Allows smaller size antennas
- Not flexible, not suitable for dynamic bandwidth allocation
Time Division bandwidth:
- Requires high transmission power and large antenna
- Highly flexible, suitable for dynamic bandwidth allocation
- Fits well in all-digital network management
- Synchronisation is a problem
- Better use of downlink power
Code division Bandwidth:
- Synchronisation is only an end-to-end problem
- Popular in military applications due its resistance against jamming
- Resistance against multi-path and frequency
- selective fading
- Popular in cellular networks

10. Block Diagram Of Satellite
System
The uplink frequencies (5.9---6.4 GHZ) are used for
TIN from the earth station to the satellite and down
link frequencies (3.7-4.2GHZ). The above
frequencies are used for TIN from the satellite to the
earth station the uplink frequencies are converted to
lower frequencies by the mixer and local Osc, the
com satellite acts as a repeater station it receives the
signal, amplifiers it and then transmitted over a next
frequencies to avoid interference between the uplink
signal and down link , the two way communication
is established with the help of transponder a com
satellite has multi transponder per satellite has in
creased over the year ,a satellite with 2 transponder
can support a signal T.V channel or 240 telephone
lines a satellite with 48 transponder can
accommodate 4000T.P CKTS and 2 TV channels
now-a-days in satellite using a digital tech , due to
which One satellite can handle 120,000 T.P4
channels and more then 500 T.V channels.

11. Satellite Communication Earth
Station
The equipment used in satellite earth station are
shown in fig the earth station consist of a dish
antenna transmitter which can transmit a high
frequencies (5.9-6.4GHZ) micro wave signals,
some earth stations also called ground station ,
which can transmit and receive the signals while
others can only receive signals. A high directive
and a high gain antenna is necessary at the earth
station , because the losses over the long TIN path
is very high the signals power reaching back to the
earth station from satellite is very small . there fore
at receiving end a parabolic dish antenna with 61m
diameter provides a high gain and thus amplify the
signal power , it is important to have a low noise
amplifier before the mixer stage in the receiver
C,K,T at the satellite earth terminal.

12. Bangabandhu-1 To Open Doors
For Massive Opportunities
Bangladesh becomes a member of the exclusive club of
satellite-owning countries as its first commercial
satellite, opening the doors for huge opportunities.
Experts, policymakers, and people related with the
country’s most sophisticated project said this satellite
will give extra space to the digitization process and at
the same time, the country will earn a huge amount of
respect from foreign nations after its successful journey.
They said the country's first geostationary
communication satellite will firstly help the expansion
of internet and telecommunication services in remote
and rugged areas which still remained beyond the
coverage.

13. Bangabandhu-1 To Open Doors For
Massive Opportunities (cont..)
Bangladesh’s annual expenditure for satellite
connectivity is $14m. The cost is due to
renting bandwidth from foreign operators.
After the BS-1 launch, it would be
unnecessary. Private TV channel operators
and Direct-to-Home (DTH) as alternative of
cable television service providers will be the
main consumers of the satellite, according to
officials. The weather department, as well as
the defense sector, will also benefit from the
satellite. The BS-1 will help to bring
uninterrupted telecommunication during
disasters like cyclone or tornado.

14. Bangabandhu-1 To Open Doors For
Massive Opportunities (cont..)
Faster broadcasting system Direct-to-
Home services always provide faster
access to worldwide television
entertainment. Currently, there are only
two companies that have a license from
the government. These are Beximco and
Buyer Media Limited. Before, the
operators conducted a monopoly business.
Now there will be a big change and easier,
faster access to global TV entertainment
will be ensured. The satellite will make
video distribution easier too. The
broadcasters can effortlessly distribute
their content to intermediaries like cable
TV network operators or re- broadcasters
like DTH operators.

15. Advantage Of Satellite
Communication
1. The satellite communication is very helpful for the people staying in remote
areas.
2. The satellite communication services are very helpful for the department of
defense, where the people on the fields cannot use the wired service every time.
3. The satellite communication provides with the status of weather.
4. Satellite communication services being so portable are very easy to install and
user-friendly as well.

16. Disadvantage Of Satellite
Communication
1. Launching satellites into orbit is costly.
2. Satellite bandwidth is gradually becoming used up.
3. There are a larger propagation delay and noise interference in satellite communication.
4. Impossibility to repair and maintain.

17. Bangabandhu Satellite Project Wins
Int‘laward
Bangabandhu Satellite Project has got the
prestigious “Recognition of Excellence”
award from the International
Telecommunication Union (ITU). State
Minister for Post and Telecommunications
Tarana Halim received the award on
behalf of the government at the
concluding ceremony of the four-day ITU
Telecom World 2016 in Bangkok.

18. Any Question ?