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RTK ASSIST SERVICES

Item# RTK Assist

Powered by TerraStar, RTK ASSIST enables NovAtel receivers to maintain centimeter-level accuracy during RTK data outages, radio signal blind spots or cellular network connectivity interruptions. View Full Description

Category: All Equipment
Manufacturer: NovAtel
Manufacturer Number: RTKAP
NovAtel
 


 
 
 

NovAtel RTK ASSIST™ Services

Powered by TerraStar, RTK ASSIST enables NovAtel receivers to maintain centimeter-level accuracy during RTK data outages, radio signal blind spots or cellular network connectivity interruptions. RTK ASSIST automatically works in the background, engaging and disengaging between RTK correction outages. The positioning solution transitions to ASSIST™ mode and remains there until corrections are recovered, a timeout is reached, or position accuracy degrades beyond a defined threshold.
 
RTK ASSIST is available as a termed subscription directly from NovAtel for land, unmanned and airborne applications. 
 

RTK ASSIST™

(RTK ASSIST is available on all OEM7 products and is only available on OEM628, FlexPak6 and SMART6-L products.)

  • Extended RTK operation, which improves productivity by reducing the downtime caused by RTK correction signal outages and cellular signal interruptions
  • Operates seamlessly in the background from the onset of an RTK correction outage, during the outage and once the connection is re-established
  • Automatically compensates for datum differences and other biases to the RTK solution
  • Global coverage as the technology uses TerraStar GNSS corrections generated from a worldwide network
  • RTK ASSIST uses satellite-delivered corrections over L-Band directly to end users worldwide
  • Scalable solutions including RTK ASSIST and RTK ASSIST PRO to meet different application needs
  • With an RTK ASSIST subscription, RTK ASSIST maintains centimeter-level positioning for up to 20 minutes of RTK correction outages

RTK Assist Pro

(RTK ASSIST PRO is available only on OEM7® products.)

  • With an RTK ASSIST PRO subscription, unlock unlimited RTK assistance, maintaining centimetre-level accuracy for even longer RTK correction outages and downtimes
  • Provides centimetre-level positioning solution independent of RTK, enabling operations even in areas where there is no RTK base or network coverage
  • Uses corrections from GPS, GLONASS, Galileo and BeiDou constellations to provide highly accurate and reliable positioning
 

 

Frequently Asked Questions About TerraStar and RTK Assist Services

1. What is TerraStar and how does it work?

TerraStar GNSS correction services provide precise orbit, clock, biases and other system parameters to enable precise positioning worldwide. Combined with NovAtel OEM positioning technology, it enables sub-metre to centimetre-level positioning. TerraStar corrections are transmitted in real-time, with minimal latency, via satellites and through cellular networks (Internet Protocol). 
 

 2. What TerraStar services are offered currently?

TerraStar offers scalable correction services from sub-meter to centimeter-level to meet the individual application need.
 
  TerraStar Service Constellation Supported Horizontal Accuracy1 Initial Convergence1
Sub-meter TerraStar-L GPS and GLONASS 40 cm (RMS), 50 cm (95%) < 5 mins 
Sub-decimeter TerraStar-C GPS and GLONASS 4 cm (RMS), 5 cm (95%)  30 - 45 mins
Centimeter TerraStar-C PRO GPS, GLONASS, Galileo and BeiDou 2.5 cm (RMS), 3 cm (95%) < 18 mins

 

 
     
 
 
 
 
 
 
 
 
 
1 Performance may differ based on receiver capabilities, location, GNSS constellation health and visibility, GNSS/L-Band signal obstructions, level of multipath/interference, and local atmospheric conditions. 
 

3. What is RTK ASSIST and how does it work?

Powered by TerraStar, RTK ASSIST enables NovAtel receivers to maintain centimetre-level precision during RTK correction outages due to radio signal blind spots or cellular network connectivity interruptions.
 
RTK ASSIST operates in the background using the satellite-delivered corrections to compute and adjust precise positioning relative to RTK positioning with centimetre-level precision. RTK ASSIST automatically works in the background seamlessly engaging and disengaging between RTK correction outages. 
 

4. What is the difference between RTK ASSIST and RTK ASSIST PRO?

While RTK ASSIST can be enabled either via RTK ASSIST or RTK ASSIST PRO subscription, they are designed to overcome different RTK challenges.
 
RTK ASSIST is intended to extend RTK operations for brief RTK correction outages. RTK ASSIST will disengage after 20 minutes of continuous operation.
 
RTK ASSIST PRO extends RTK level performance without any timeout, allowing for even longer downtimes. It also enables centimetre-level positioning to operate in regions with no or severely degraded RTK coverage. RTK ASSIST PRO uses multi-constellation corrections to deliver highly reliable centimetre-level positioning and reducing the time to reach FULL ASSIST mode.
 
  Constellation Support RTK Outage Period Supported  Horizontal Precision1 Convergence Time (to FULL ASSIST2)
RTK ASSIST GPS and GLONASS Up to 20 minutes < 5 cm (95%) < 30 mins
RTK ASSIST PRO GPS, GLONASS, Galileo and BeiDou Unlimited < 3 cm (95%) < 10 mins

   

Performance may differ based on receiver capabilities, location, GNSS constellation health and visibility, GNSS/L-Band signal obstructions, level of multipath/interference, and local atmospheric conditions. 
 
See Application Note APN073: RTK ASSIST for more information. 
 

5. On which NovAtel products are TerraStar and RTK ASSIST services available?

TerraStar services are available on most OEM6® and OEM7® products, with minor exceptions shown in the table below. Customers using OEMV™ or SPAN® on OEMV products will need to upgrade to OEM6 or OEM7 hardware to get TerraStar services.
 
 
TerraStar Service OEM6 OEM7  Products Supported
TerraStar-L yes yes OEM628, FlexPak6 and SMART6-L. All OEM7, except OEM76001
TerraStar-C yes no OEM628, OEM638, FlexPak6, ProPak6 and SMART6-L products. All OEM7, except OEM7600.
TerraStar-C PRO no yes All OEM7, except OEM7600.
RTK ASSIST yes yes OEM628, FlexPak6 and SMART6-L. All OEM7 except OEM76001.
RTK ASSIST PRO no yes All OEM7, except OEM7600.

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
1OEM7600 will support TerraStar services in future releases. 
 

6. What applications can benefit from TerraStar or RTK ASSIST services?

TerraStar GNSS corrections and NovAtel OEM solutions are used in agriculture, survey, GIS, mobile mapping, construction and mining, unmanned and airborne applications. Contact NovAtel Sales, to discuss your specific needs.
 

7. How can I obtain a TerraStar or RTK ASSIST service?

NovAtel customers can purchase TerraStar or RTK ASSIST services for a specific receiver from NavtechGPS. TerraStar services are available on specific platforms and models. Models can be purchased and enabled through authorization codes similar to other receiver features such as ALIGN and SPAN.  The receiver should have the correct firmware version and the model for enabling the requested TerraStar service. The following table summarizes the required minimum model and the compliant FW versions, for different TerraStar services.
 
TerraStar Service OEM6  OEM7   Required Minimum Model
TerraStar-L
6.700 or later
7.02 or later  L-Band and GLIDE® (OEM6)
TerraStar-C 6.600 or later Not supported L-Band and PPP (OEM6)
TerraStar-C PRO 7.05 or later PPP Not supported PPP
RTK ASSIST 6.710 or later 7.02 or later L-Band and RTK (OEM6)
RTK ASSIST PRO
Not supported 7.05 or later RTK
 
Contact NavtechGPS for pricing and purchasing options.  
 

8. How is TerraStar or RTK ASSIST service activated on a receiver?

TerraStar and RTK ASSIST services are activated for a specific unit via a subscription. The customer can request the service to start immediately or at a specified start date/time (within 90 days).
 
Activation messages for the subscription are sent over the air via satellite at the start of the service and periodically afterward. Customers can request through NovAtel Support a resend of their activations if the initial activation was missed.
 
See TERRASTARINFO log for more details or contact us.
 

9. What is the difference between regional and global subscriptions?

Regional subscriptions are transmitted over three adjoining satellites to provide continent-wide coverage. Global subscriptions are transmitted over all seven satellites to provide worldwide coverage. 

10. Are there any restrictions in using TerraStar services?

Regional land subscriptions are limited to a maximum speed of 130 km/h (or 80 mph). Global land and unmanned applications have no speed limit and operate up to 10 km from shore to allow operation along coastlines. Airborne subscriptions are not restricted geographically and have no speed limitation. 
 
TerraStar subscriptions cannot be used for marine and offshore applications.

11. Is there a demo/test activation for TerraStar service?

Yes, customers can request demo/test activations. Contact us for more information.

12. Where can I get further support related to TerraStar subscription services?

Contact us first or we can direct you to NovAtel’s Applications Engineering team supports all products sold by NovAtel, including TerraStar and RTK ASSIST subscriptions.