The GATE Grind

GATE 2016 CE (CE1) – Question 34

Geomatics Engineering · Maps, scale, coordinate systems, cartography and map projections · 1 mark · Multiple choice

The system that uses the Sun as a source of electromagnetic energy and records the naturally radiated and reflected energy from the object is called

  1. Geographical Information System
  2. Global Positioning System
  3. Passive Remote Sensing
  4. Active Remote Sensing

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (C) Passive Remote Sensing

Explanation

A passive sensor records naturally available reflected or emitted electromagnetic radiation. It does not transmit its own probing signal as radar or lidar does. The system described therefore belongs to **passive remote sensing, C**.