This presentation was made for my 2nd year 2nd term course. Me and my friend gave this presentation. We are very much interested in cosmology and space program. **If you want the script of this presentation leave a message in LinkedIn

1. HOW MUCH YOU WANT TO GO?
HOW MUCH YOU WANT TO REACH?
TO SEND MESSAGE!YOUR

2. KHULNA UNIVERSITY OF ENGINEERING & TECHNOLOGY
Electronics And Communication Engineering
Abidur Rahman
1509056
DEEP SPACE COMMUNICATION
Pritom Mojumder
1509053

3. Communication SysteminEarth

4. Distance has increased!
Lets go Beyond Earth
Lets think about DEEP SPACE

5. WhatisDeepSpaceCommunication?
Deep space communication includes communication with
satellites and spacecraft active in the outer space region as
well as collecting radio and radar astronomy observations for
the space exploration.

6. MainFunctionsofDeepSpaceCommunication
• Acquire telemetry data .
• Transmit commands to spacecraft.
• Gather science data.
• Monitor and control the performance of the network

7. ChallengesofDeepSpaceCommunications

8. 1.Distance
Distance is the main problem in space communications, since
the intensity of electromagnetic radiation decreases
according to 1/r2, that is why signals from deep space probes
are usually very weak when they reach the earth.
EARTH MARS
54.6 million kilometers

9. 2.TimeDelay
It takes over 5 hours for a signal from earth to reach the orbit
of Pluto in the outer part of the solar system.
EARTH PLUTO

10. 3.LineofSight
In order to communicate with the Earth the spacecraft or
satellite must have a free line of sight to the Earth, since radio
waves cannot pass through large solid objects such as planets
and moons.

11. 4.AntennaAlignment
Even if the probe has a free line of sight to the Earth, the
receiving antenna could be on the wrong side of the Earth.

12. DeepSpaceNavigation
• No GPS
• Requires ground stations
• Use precision measurements of the radio signals
Ranging: measurement of the distance to the spacecraft
Doppler Effect: measurement of relative spacecraft motion
Interferometric techniques: use multiple ground antennas to
measure spacecraft angle in the sky.
• Augmented by on-board sensors
Gyros
Star trackers
Sun sensors
Photographs of known objects against stellar background

13. Voyager 1
>The first human-made
object has entered into
interstellar space.
>Launched in 1977
Milestone

14. FUTURE
NASA is Laser-focused on Deep
Space Communication
Tapping the advantages offered by
laser communications is expected
to revolutionize future space
endeavors

15. It is not distance that keep people apart, but
lack of communication.