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Paper
GS-I
Question
Q4
Marks
10M
Word Limit
150W
Model answer will be available after you finish writing.
Model Answer
Source: Civils Daily · CivilsDaily Editorial
Approach
IRNSS constellation of eight satellites, NavIC. Three satellites are located in suitable orbital slots in the geostationary orbit and the remaining four are located in geosynchronous orbits with the required inclination and equatorial crossings in two different planes.
It is needed for the following
- Terrestrial, Aerial and Marine Navigation
- Disaster Management
- Vehicle tracking and fleet management
- Integration with mobile phones
- Precise Timing
- Mapping and Geodetic data capture
- Terrestrial navigation aid for hikers and travelers
- Visual and voice navigation for drivers
Besides the above applications, it has implications for India’s security. It will help India become self-reliant to keep a close watch on its boundaries and remove its dependence on US-based GPS. Hence, its military applications remain important.
It is also playing an important role in India’s softer diplomacy by providing services to our neighboring countries.
It helps in navigation in the following manner
>It uses the principle of triangulation.
> It requires only three satellites to provide a precise location. The other satellites add to the accuracy.
If you are positioned somewhere on Earth with three satellites in the sky and if you know how far away you are from satellite A, then you know you must be located somewhere on the red circle. If you do the same for satellites B and C, you can work out your location by seeing where the three circles intersect.
Original source: Civils Daily
Paper
GS Paper I — Indian Heritage, History, Geography & Society
Subject
Geography and EnvironmentSubtopic
Salient features of world's physical geography
Difficulty
Easy
Questions frequently practiced alongside this one by UPSC aspirants
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This question is from the Geography and Environment topic under GS-I (2018). It carries 10 marks with a 150-word limit. Difficulty: Easy.
Yes, a 247-word model answer is available from Civils Daily by CivilsDaily Editorial.
For a 10-mark question with 150-word limit, structure your answer with a brief introduction, 2-3 main body points with evidence, and a forward-looking conclusion.