Introduction to Remote Sensing

Remote Sensing Introduction

• Remote sensing is the practice of acquiring information about an object or area from a distance using sensors.
• Remote sensing systems use electromagnetic radiation to detect and measure the characteristics of objects and areas.
• These systems are often used in Earth observation and environmental monitoring.

Advantages of Remote Sensing over Conventional Systems

• Remote sensing can cover large areas quickly and efficiently.
• It can acquire data in areas inaccessible by ground-based methods
• Provides data that is often more accurate and objective than conventional methods.

Energy Interaction in the Atmosphere

• The atmosphere interacts with electromagnetic radiation, influencing its transmission and reflection.
• Factors such as scattering, absorption, and emission by atmospheric constituents affect the data collected by remote sensing systems.
• Understanding these interactions is crucial for interpreting the data and obtaining accurate information.

Indian Remote Sensing Satellite Series

• The Indian Space Research Organisation (ISRO) has launched a series of remote sensing satellites.
• The series includes satellites like IRS, Resourcesat, and Cartosat, which provide various types of data for applications ranging from agriculture to disaster management.

Global Positioning System (GPS) Introduction

• GPS is a satellite-based navigation system that provides users with accurate location, time, and velocity information.
• It uses a constellation of satellites orbiting Earth, transmitting signals to receivers on the ground.
• GPS receivers process these signals to calculate their precise location and time.

GPS Receivers

• GPS receivers are electronic devices that receive signals from GPS satellites.
• They consist of an antenna, a receiver unit, and processing software.
• The receivers process the received signals to calculate the user's position and time.

Advantages of GPS

• GPS provides highly accurate location and time information.
• It is a versatile technology with numerous applications in navigation, surveying, mapping, and other fields.
• GPS systems are widely available and affordable, making them accessible to a broad range of users.

This quiz covers the fundamentals of remote sensing, including its definition, advantages over conventional systems, and the interaction of energy in the atmosphere. Understanding these concepts is essential for applications in Earth observation and environmental monitoring.