AFS Correction Signal Options

Our goal is to keep customers up-and-running during the season.

One of the easiest ways to increase productivity is to select the best signal for GPS-guided equipment. With the variety of options available today, it is worth the time to research and select a signal that fits your operation. Read the article below, and talk to your local Precision Farming specialist to learn more.


High Accuracy

Birkey’s RTK

Ground Based
<1” Pass to Pass Accuracy
Correction provided via radio

  • Subscription based signal offered by Birkey’s.
  • Individual ground based RTK correction stations broadcast correction for US GPS and Russian Glonass satellites.
  • Best suited to high performance row crop operations requiring high accuracy including planting and strip tillage.
  • Also provides high repeatability year to year.

*Compatible with Trimble displays and Case IH receivers unlocked for high-level correction.

DigiFarm VBN

Ground Based
<1″ Pass to Pass Accuracy
Correction provided via cellular modem

  • Subscription based signal offered by DigiFarm.
  • Uses multiple ground based correction stations to create a virtual RTK base station near the rover.
  • This provides high-level correction for US GPS and Russian Glonass satellites even when the nearest base station is 40 miles away.
  • Best suited to high performance row crop operations requiring high accuracy including planting and strip tillage.
  • Also provides high repeatability year to year.

*Compatible with many different displays and receivers including Trimble, Case IH, and Ag Leader unlocked for high-level correction.

CenterPoint RTX

Satellite Based
1.5” Pass to Pass Accuracy

  • Subscription based signal offered by Trimble Positioning Services.
  • High-level correction for US GPS and Russian Glonass satellites.
  • Best suited to high performance row crop operations requiring high accuracy including planting.

*Only compatible with Trimble FM750, FM1000, and CXN2050 displays, or Case IH 372 receiver unlocked for intermediate-level correction.

TerraStar C

Satellite Based
1.5” Pass to Pass Accuracy

  • Subscription based signal offered by NovAtel.
  • High-level correction for US GPS and Russian Glonass satellites.
  • Best suited to high performance row crop operations requiring high accuracy including planting.

*Compatible with Ag Leader 6500 receivers unlocked for intermediate-level correction.


Medium Accuracy

OmniSTAR HP

Satellite Based
2-4” Pass to Pass Accuracy

  • Subscription based signal offered by Trimble Positioning Services.
  • Intermediate-level correction for US GPS satellites only.
  • Best suited to high performance broadacre seeding, spraying, and harvesting.

*Must have a compatible Trimble or Case IH receiver unlocked for intermediate correction.

OmniSTAR G2

Satellite Based
3-4” Pass to Pass Accuracy

  • Subscription based signal offered by Trimble Positioning Services.
  • Intermediate-level correction for US GPS and Russian Glonass satellites.
  • Best suited to high performance broadacre spraying and tillage.

*Not recommended for operations requiring high accuracy such as planting. 
Only compatible with Trimble FM750, FM1000, and CXN2050 displays, or Case IH 372 receivers unlocked for intermediate-level correction.


Low Accuracy

OmniSTAR XP

Satellite Based
3-4” Pass to Pass Accuracy

  • Subscription based signal offered by Trimble Positioning Services.
  • Intermediate-level correction for US GPS satellites only.
  • Best suited to high performance broadacre spraying and tillage.

*Not recommended for operations requiring high accuracy such as planting. 
Must have a compatible Trimble display or Case IH receiver unlocked for intermediate-level correction.

RangePoint RTX

Satellite Based
<6” Pass to Pass Accuracy

  • Subscription based signal offered by Trimble Positioning Services.
  • Entry level correction which corrects for both US GPS and Russian Glonass satellites.
  • RangePoint is an improvement over WAAS but still best suited to broadacre application and tillage.

*Not recommended for operations requiring high accuracy such as planting.
Only compatible with Trimble FM750, FM1000, and CXN2050 displays, or Case IH 372 receivers.

WAAS (Wide Area Augmentation System)

Satellite Based
6-8” Pass to Pass Accuracy

  • Free correction signal provided by the US Government.
  • Originally designed for aviation it is now used extensively in agriculture.
  • WAAS provides correction for US GPS satellites only and does not correct for Russian Glonass satellites.
  • Suggested uses include broadacre application and tillage.

*Not recommended for operations requiring high accuracy such as planting.

By : Phil Stewart /July 07, 2015 /Agriculture, Precision Farming, Tech Tip /0 Comment

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