Remote sensing is the collection and

interpretation of information about the earth

from far away. Information from space, the

air and ships (taking measurements from

the ocean depth) significantly aids our

understanding of the Earth. Remote sensing

is essential to accurately model the

environment and map the earth for use in

Geography Information Systems (GIS) and

global positioning system (gps).

1609 - Invention of the telescope

Galileo

1859 - First aerial photographer

Gaspard Felix Tournachon, also known as Nadar

1862 - US Army balloon corp

1903 - The BavarianPigeon Corps

1909 - Dresden International

Photographic Exhibition

1908 - First photos from an airplane

PASSIVE REMOTE SENSING ACTIVE REMOTE SENSING

Passive sensors detect natural radiation that is

emitted or reflected by the object or surrounding

area being observed.

Reflected sunlight is the most common source of

radiation measured by passive sensors.

Examples of passive remote sensors include film

photography, infrared, charge-coupled devices,

and radiometers.

Active collection, on the other hand, emits

energy in order to scan objects and areas

whereupon a sensor then detects and measures

the radiation that is reflected or backscattered

from the target.

RADAR is an example of active remote sensing

where the time delay between emission and

return is measured, establishing the location,

height, speed and direction of an object.

HOW DOES REMOTE SENSING WORK?

Humans can only

see a small portion of

the electromagnetic

spectrum called

visible light.

All remote

sensing systems

such as satellites

are dependent on

energy.

Energy comes in many forms, yet most traditional

remote sensing systems measure wavelengths from

within the electromagnetic spectrum.

Geology

Environmental monitoring

Commercial forestry

Reconnaissance mapping

Forestry

Agriculture

Hydrology

Sea Ice

Land Cover & Land Use

Spectral Signatures

Image Acquisition

Spatial Resolution

Spectral Resolution

Multispectral Images

Radiometric Resolution

Optical System

RADAR System

LIDAR System

Remote sensing makes it possible to collect data on dangerous or inaccessible areas and

Remote sensing also replaces costly and slow data collection on the ground, ensuring in the process that areas or objects are not disturbed.

Other uses include different areas of the earth sciences such as natural resource management, agricultural fields such as land usage and conservation.

A satellite system that projects information to GPS

receivers on the ground, enabling users to determine

latitude and longitude coordinates.

Software program that enable users to store and

manipulate large amounts of data from GPS and other

sources.

THE MOST EFFECTIVE TECHNOLOGY TO

GATHER INFORMATION ON ANY PART OF

THE EARTH WITHIN A SHORT SPAN OF TIME

WITHOUT FOOTING THE REGION IS THE

REMOTE SENSING TECHNOLOGY.

REMOTE SENSING TECHNOLOGY IS VERY

USEFUL TO MANKIND!!

KAUSHIKAA.N.JSUSHMITHA.R.S