TopNEXT – California

TopNEXT Data Services and Subscription Rates

	Our premium package - Network RTK, RTK and DGPS
1 Month (30 days) $200 3 Months (90 days) $500 1 Year (365 days) $1,300 (Discounts for prepaid annual terms)
	Real-Time Differential GPS
3 Months (90 days) $200 1 Year (365 days) $795 (Discounts for prepaid annual terms)
	Agriculture Corrections
3 Months (90 days) $250 1 Year (365 days) $895 (Discounts for prepaid annual terms)

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For general inquiries regarding

• The TopNEXT Real Time Network
• Reference network products
• Hosting a Coop Real Time Network

Contact: TopNEXT@topcon.com

Topcon Cooperative Geodetic Reference Network – California

The Topcon Cooperative Geodetic Reference Network reliably delivers precision real time GNSS data where you need it, when you need it.

No longer limited to operating on your ‘home turf’, projects away from your typical operating area can be accommodated on short notice through online purchasing (Summer 2009) of short term accounts with a cooperative real time network covering the project area.

Geodetic Network Features

• Dual frequency, dual constellation GNSS reference receivers
• Reference Station coordinates have been professionally surveyed and adjusted by geodetic surveyors at Topcon Positioning Systems, Inc.
• All network reference stations are continuously monitored.
• Direct connection to the National Spatial Reference System
• Reliable 24/7/365 operation

TopNEXT GNSS Reference Network Real – Time Data Services Explained

TopNEXT DGPS

Real Time, differential GPS corrections (DGPS) are computed and broadcast from each reference station. GIS and mapping customers will be connected automatically to the nearest reference station to maximize accuracy potential.

RTK

The Real Time Kinematic (RTK) service will automatically connect your rover to the nearest reference station using the low bandwidth, industry standard RTCM 3.0 data format.

Network RTK

TopNET collects data from all the available Reference Stations and forms a correction field, where precise values can be calculated at any point inside the field. From these corrections and user’s coordinates sent by the Rover (standard NMEA-0183 GGA message), TopNET simulates a Reference Station receiver located close to the Rover. The generated data are sent to the Rover using the industry standard RTCM 3.0 data format and used for obtaining precise solutions.