GPS Accuracy

There are 4 pass to pass accuracy choices available*:

GPS (Autonomous)

(Autonomous Global Positioning System)

Differential Correction
None

Typical Usage
Spraying
Spreading
Harvesting
Variable Rate Control
Mapping
Field Preparation

5Hz Receiver
GPS receiver and antenna, in a single rugged housing. The low-profile unit comes with an integrated magnetic base for easy mounting.

DGPS

(Differential GPS)
Frequency L1

Differential Correction
WAAS, Marine Beacon, EGNOS or VBS

Typical Usage
Spraying
Spreading
Harvesting
Variable Rate Control
Mapping
Field Preparation

VBS + Beacon
Consistent sub-metre performance with many differential correction options. Fast update rates (up to 5 times per second) provide the best guidance and machine control.

(High Performance)
Dual Frequency L1/L2

Differential Correction
OMNISTAR HP

Typical Usage
Planting
Cultivating
Tilling
Seeding
Seed Bedding

Map-HP
Offers a full range of accuracy options from approx 1m (using single frequency DGPS services such as EGNOS) to centimeter level when configured to operate dual frequency RTK.

RTK

(Real-Time Kinematic)
Dual Frequency L1/L2

Differential Correction
RTK Base Station

Typical Usage
Drip Tape Replacement
Topographic Mapping
Land Leveling
Strip Tilling

AGI-3 and HiPer
Hiper receives feature GPS plus GLONASS satellite tracking, giving up to 50% more satellites. The AGI-3 is ag's first triple constellation receiver, GPS, GLONASS, and Galileo.

80 Satellites

The total number of satellites will exceed 80 when all the Galileo satellites are in service, and system upgrades and additions to the GPS and GLONASS systems are completed.

Topcon's World First G3 technology is capable of receiving signals from ALL available satellites.

GPS: Currently 24 American satellites
GLONASS: Currently 18 Russian satellites
Galileo: Currently 1 European satellite

More Satellites

Varied frequencies provide better precision. This helps eliminate down-time duing poor satellite coverage and ensures higher productivity.

Differential Correction Signals

Satellite signals must be corrected to be suitable for the precision agriculture industry. This is known as Differential Correction. Not all signals are available in all world regions.

Sub Metre Correction

OMNISTAR: Subscription
Marine Beacon: Free
WAAS: Free Signal
EGNOS: Free Signal

* Pass to pass accuracy based on 15 minute intervals.