GPS (Global Positioning System) is a highly accurate navigation system using signals from satellites to determine a location on the Earth’s surface, irrespective of weather conditions.

 

It is dependent on GPS satellites high above the Earth which transmit signals containing the time and location of the satellite. Any ground-based receiver which receives signals from four or more GPS satellites can use navigation equations to calculate its location on the Earth’s surface. Constant signaling can then update speed and direction information for moving receivers.

 

Prismatic compass is a portable magnetic compass which can be either used as a hand instrument or can be fitted on a tripod. It contains a prism which is used for accurate measurement of readings. The greatest advantage of this compass is both sighting and reading can be done simultaneously without changing the position. Prismatic Compass made of Gun / Non magnetic metal in a Leather case with Teak wood tripod Stand. Size of compass 100 mm. dia as per IS specification.

Major parts of a Prismatic Compass are:

• Magnetic needle

• Graduated ring

• Adjustable mirror

• Sliding arrangement for mirror

• Object vane

• Eye vane

• Metal box

• Glass cover

 

A theodolite is a precision optical instrument for measuring angles between designated visible points in the horizontal and vertical planes. The optical level is sometimes mistaken for a theodolite, but it does not measure vertical angles, and is used only for leveling on a horizontal plane. 

 

Specification:

Magnification 30X

Accuracy Vertical +6" +10"

 

Accuracy Horizontal +2" +6"

 

Objective Aperture 40mm

Shortest Focusing Distance 1.6m 2.0m

 

Field of view 1"20 1"30

 

Multiplication constant 100

Setting Accuracy +0.3" +1"

 

Working Range + 3

 

A total station is an electronic/optical instrument used in modern surveying and building construction that uses electronic transit theodolite in conjunction with electronic distance meter (EDM). It is also integrated with microprocessor, electronic data collector and storage system. 

 

Specification:

Magnification 30 x

Accuracy 2" 5" 2" 5"

 

Min. Readout 1" and 5"

Single Prism 2.0km 1.7km 1.8km 1.5km

 

Triple Prism 2.6km 2.3km 2.6km 2.3km

 

Data Port RS232C RS232

 

Internal Memory 8000 point 10,000 point

 

Max. Display 999999.999m

Comp. Range + 3

Resolution 1"

Op. Temperature -20 Deg C - +45 Deg C