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Lecture-3 
Science & Technology
Page 2


Lecture-3 
Science & Technology
Space Technology
Page 3


Lecture-3 
Science & Technology
Space Technology
Previous Lecture
1.GSLV (GEOSYNCHRONOUS     
SATELLITE LAUNCH VEHICLE)
2.Cryogenic VS Semi-Cryogenic
3.COMMUNICATION SATELLITE
4. Earth Observation Satellites 
Page 4


Lecture-3 
Science & Technology
Space Technology
Previous Lecture
1.GSLV (GEOSYNCHRONOUS     
SATELLITE LAUNCH VEHICLE)
2.Cryogenic VS Semi-Cryogenic
3.COMMUNICATION SATELLITE
4. Earth Observation Satellites 
SATELLITE NAVIGATION (SAT –
NAV)
• Introduction:
Satellite navigation ("satnav") means 
using a portable radio receiver to 
pick up radio waves from orbiting 
satellites so you can figure out your 
position, speed, and local time. It 
works on the principle of 
Trilateration.
Page 5


Lecture-3 
Science & Technology
Space Technology
Previous Lecture
1.GSLV (GEOSYNCHRONOUS     
SATELLITE LAUNCH VEHICLE)
2.Cryogenic VS Semi-Cryogenic
3.COMMUNICATION SATELLITE
4. Earth Observation Satellites 
SATELLITE NAVIGATION (SAT –
NAV)
• Introduction:
Satellite navigation ("satnav") means 
using a portable radio receiver to 
pick up radio waves from orbiting 
satellites so you can figure out your 
position, speed, and local time. It 
works on the principle of 
Trilateration.
Since, it is a broadcast system based 
on radio signals that reach all parts of 
planet, any number of people can use 
it at once, anywhere they happen to 
be.
It is an emerging satellite based system 
with commercial and strategic 
application
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FAQs on PPT: Space Technology- 3 - Crash Course for UPSC Aspirants

1. What are the latest advancements in space technology?
Ans. The latest advancements in space technology include the development of reusable rockets, the use of artificial intelligence in space exploration, advancements in satellite technology for communication and Earth observation, and the development of spacecraft for deep space exploration.
2. How is space technology used in everyday life?
Ans. Space technology is used in everyday life in various ways. It enables communication through satellite-based services like GPS and satellite television. It also facilitates weather forecasting, disaster management, and navigation systems. Additionally, space technology plays a crucial role in studying Earth's climate, monitoring agriculture, and managing natural resources.
3. What challenges are faced in the development of space technology?
Ans. The development of space technology faces several challenges. These include high costs associated with research, development, and launch of space missions. Other challenges include ensuring the safety of astronauts, mitigating the effects of radiation in space, and dealing with the complexities of long-duration space travel. Furthermore, space debris management and international cooperation in space exploration are also significant challenges.
4. How does space technology contribute to scientific research?
Ans. Space technology contributes to scientific research by enabling the observation of distant celestial objects, studying the origin and evolution of the universe, and exploring other planets and moons in our solar system. It also helps in studying Earth's climate, atmosphere, and geology. Additionally, space technology aids in conducting experiments in microgravity environments, advancing our understanding of physics, biology, and materials science.
5. What are the future prospects of space technology?
Ans. The future prospects of space technology are vast. It includes the exploration of Mars and other celestial bodies, the establishment of permanent human presence in space, and the development of advanced spacecraft capable of interstellar travel. Furthermore, space technology is expected to contribute to the development of renewable energy sources, satellite-based internet services, and space-based manufacturing.
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