What
is GPS?
· GPS is satellite based navigation system made up of a network of 24-satellites placed into orbit by U.S. Department Of Defense.
· Main Task: - Navigation.
· Position: - Network of 24-satellites.
HISTORY
· First GPS satellite was called GPS block-I launched in 1978.
· Basic purpose was for defense.
· System of 24-satellites was achieved in 1994.
GPS
SEGMENTS
WORKING
OF GPS
GPS
RECEIVER
ACCURACY
- The
GPS receivers are extremely accurate due to its multi-channel design.
- Its time signals are too much accurate.
- There is a difference of around 15 meters
from the object.
ADVANTAGES
· GIS conversion is simple.
· Data collection costs are lower.
· Feature visual inspection is possible while gathering data.
· Data gathering is possible 24-hours any time and anywhere.
· Unaffected by weather.
DISADVANTAGES
- Requires
training and retraining as technology changes.
- Buildings
can block satellite signals.
- Heavy
foliage and thick branched trees can attenuate and/or block satellite
signals
- Requires
careful attention to system.
APPLICATIONS
OF GPS
- DEFERENCE
- GEOLOGICAL SURVEY
- AUTOMOBILES
DEFERENCE
GEOLOGICAL
SURVEY
AUTOMOBILES
CURRENT
RESEARCH & FUTURE DEVELOPMENTS
- Earthquake
monitoring
- GPS management & technological innovations will make GPS surveying easier & accurate
- GPS
is poised to become most revolutionary positioning technique of new
century
- Soon
use it like cell-phone.
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