Remote sensing involves collecting and interpreting data about the Earth from various distances, significantly enhancing our environmental and geographical understanding. It utilizes both passive and active sensors to measure electromagnetic radiation, with applications across geology, agriculture, and resource management. The technology is vital for efficient data collection, especially in inaccessible areas, and supports global positioning and geographic information systems.

2. 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).

3. 1609 - Invention of the telescope
Galileo

4. 1859 - First aerial photographer
Gaspard Felix Tournachon, also known as Nadar
1862 - US Army balloon corp

5. 1903 - The Bavarian
Pigeon Corps
1909 - Dresden International
Photographic Exhibition

6. 1908 - First photos from
an airplane

7. PASSIVE REMOTE SENSING ACTIVE REMOTE SENSING

8.  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.

9.  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.

10. 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.

11.  Geology
 Environmental monitoring
 Commercial forestry
 Reconnaissance mapping
 Forestry
 Agriculture
 Hydrology
 Sea Ice
 Land Cover & Land Use

12. Spectral Signatures
Image Acquisition
Spatial Resolution
Spectral Resolution
Multispectral Images
Radiometric Resolution

13.  Optical System
 RADAR System
 LIDAR System

14.  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.

15. 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.

16. 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!!

17. KAUSHIKAA.N.J
SUSHMITHA.R.S