Presented by:-Harvendra Singh

B.Tech 3rd yrIFTM UNIVERSITY MORADABAD (UP)

Under Guidance of:-Mr. Pranshu SaxenaAssistant Professer

What is Remote Sensing ?

Remote sensing is the art of science of recording , measuring and analyzing information about a phenomenon from a distance.

ORRemote Sensing is the science and art of acquiring information

(spectral, spatial, and temporal) about material, objects, area, or phenomenon, without coming into physical contact with the objects, or area, or phenomenon under investigation.

History of Remote Sensing-• Modern remote sensing began in 1858 when Gaspard-Felix

Tournachon first took aerial photographs of Paris from a hot air balloon.• Remote sensing continued to grow from there; one of the first

planned uses of remote sensing occurred during the U.S. Civil War when messenger pigeons, kites, and unmanned balloons were flown over enemy territory with cameras attached to them.

Types of Remote Sensing -There are two types of Remote Sensing-1. Passive SensorsA passive sensor system needs an external energy source. In most cases this source is the sun.2. Active SystemAn active sensor system provides its own energy source.Ex- A Radar sensor sends out sound waves and records the reflection waves coming back from the surface.

Satellites on which remote sensing works-Satellite may be of two types:-1. Natural ex- Moon2. Artificial ex- IRSECT

Artificial satellite may be classified into two types-

Geostationary Satellite- A Satellite which is stationary with respect to a given position of the Earth is known as Geostationary Satellite.

Sun Synchronous Satellite

When the orbit plane of a satellite is nearly polar and rotates at the same rate as the mean rotation rate of the around the sun , the satellite is known as Sun Synchronous Satellite.

Applications of Remote Sensing -1. Urban – Determining the status of growing crop.2. Rock- Recognizing rock type.

3. Military- Developing precise maps for planning and monitoring ships.

4. Geology Identification of rock type and structure .

Applications of Remote Sensing in Civil Engg.:-1. Regional Planning and Site Investigations Site investigations in general require topographic and geologic

considerations. Remote sensing data permits such an assessment. In case of dam site investigation, information on topography is essential.

In selecting river-crossing sites for bridges and pipelines, an important consideration is the stability of slopes leading down to and up from the water crossing.

Example:-Tagwai Dam using RemoteSensing Technique, Minna Niger State, Nigeria

Niger State Showing Tagwai Dam

Part of Shrinking Areas of the Dam-

2. Water Resources Engineering

By analyzing multi-date RS data, it would be possible to monitor the effects of dam construction. Remotely sensed data of pre and post dam construction can reveal the forest and other land at different water levels.

To study the feasibility of inter basin transfer of surplus flood flows, RS data can be cost effective.

Remote sensing in India-A. The satellite for Earth observations(SEO) now called BHASKARA was

1st Indian Remote Sensing Satellite.B. In 1973, ISRO started construction of Satellite.C. The 1st two IRS spacecrafts are- 1. IRS 1A in March 1988. 2. IRS 1B in August 1991.

Software used For Remote Sensing are-

Google Earth Grass GIS Open EV Opticks Remote View

Thank you

For your attention…..