GPS, Machine Control, Stake Out, Base Station

Set-up

Purchase! 2 GPS Rovers, a BASE Station, a Machine Control Indicate System, and get Data Collector for Stake out…… only $50 a day

NAVCOM StarFire 

The SF-2040G integrated GPS / StarFire™ receiver provides instant position information and decimeter accuracy anywhere in the world, anytime. With this all-in-one StarFire™ sensor, you don’t need a base station to achieve decimeter accuracy. Plus, onboard memory and a geodetic-quality antenna enable millimeter-level accuracy from post-processing.

With optional RTK and RTK Extend™, the SF-2040G comes loaded with features to perform at any accuracy, anytime, and anywhere.

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StarFiretm vs. dGPS

As a Global Satellite-Based Augmentation System (GSBAS), the StarFire™ Network holds a significant advantage over differential GPS (dGPS) systems. Since no base station is required, the StarFire™ user is free to roam, with no limitations on range. StarFire™ provides one set of corrections for the entire world, as opposed to dGPS systems’ baseline-dependent regional corrections, which are geographically limited.

Learn more about GSBAS vs. dGPS systems.

GSBAS vs. dGPS systems
In order to evaluate the satellite positioning options available, the primary error sources contributing to the corrections need to be understood.

Reference and rover errors include:

• Satellite Orbit
• Satellite Clock
• Ionosphere
• Troposphere
• Multipath
• Earth Tides
• Receiver Clock
• Receiver Biases

How these are handled can be placed into two broad classes: differential GPS (dGPS) systems and Global Satellite-Based Augmentation System (GSBAS) systems.

dGPS Systems
dGPS provides relative positioning; these positioning options determine corrections at the Earth’s surface, either at individual sites or averaged over a region. These corrections are an amalgam of primary reference error sources and are transmitted to the user via radio or satellite link. User coordinates are determined relative to the reference site(s). Accuracy degrades with distance from the individual reference site or the regional boundary, primarily because of differential ionospheric and tropospheric effects, satellite orbits, and clocks. Examples of correction services include:

• Beacon DGPS
• Commercial DGPS
• RTK / Network RTK
• Widelane RTK

Widelane RTK is a relative newcomer, which is only available in the few areas of the world that require high accuracy on a regular basis for oil and gas exploration surveys.

GSBAS
Importantly, GSBAS systems provide absolute positioning, meaning they do not determine position relative to some fixed point of the Earth’s surface. Instead, they determine a position within a space-based reference frame, thus they may also be considered to be within the Space Domain group.

Satellite communication links are used for some dGPS systems, so the term GSBAS does not relate to the communication link used but instead describes the nature of the corrections, i.e. that they are for the satellites. This class includes:

• Standalone GPS
• WAAS
• EGNOS
• MSAS
• StarFire™

Augmentation for Standalone GPS consists of satellite orbit and clock updates which are generated by the GPS Ground Control Segment and distributed to the user with an ionospheric model in the GPS signal structure. It is this basic principle of determining each error source instead of amalgamating them which distinguishes GSBAS from dGPS.

Figure 1 shows the GSBAS and StarFire™ service areas and the global reference stations that are used for the StarFire™ system. The reference network infrastructure, quality of hardware, algorithm sophistication, and the speed at which this is accomplished all contribute to the robust positioning accuracy attained by the user.

The first of its kind, this global satellite-based augmentation system (GSBAS) provides decimeter positioning accuracy on a worldwide basis, completely independent of geographical boundaries, allowing users to roam freely while maintaining the most precise positioning information.

As the only GPS manufacturer providing both GSBAS signal service and high-precision GPS products of its own design, NavCom is able to offer custom solutions for unique customer applications.

NAVCOM GPS Sensor

Base Station or Machine Control

VueStar™ is the world’s first complete global aerial survey navigation system. This self-contained system utilizes the StarFire™ Network’s Global Satellite-Based Augmentation System (GSBAS) to provide precise, decimeter-level positioning worldwide without the need for RTK base stations or GPS post-processing. It also eliminates the costs and logistical difficulties of establishing multiple reference station sites. The VueStar™ system includes a NavCom precision GPS receiver, FAA certified aerial antenna, and StarPac™ Utility Software; the optional Event Latch Interface adds integration flexibility to aerial cameras and survey sensors.

Fast, accurate positioning
The 12-channel, dual-frequency GPS receiver computes real-time positions at up to 25 times a second, re-acquires GPS signals faster, and includes improved troposphere modeling which better compensates for changes in altitude.

Ease of integration
Quick and easy to setup, VueStar™ seamlessly integrates into pre-existing workflows, and delivers precise positioning worldwide without the need for RTK base stations or GPS post processing. With a single ‘all-in-one’ FAA certified antenna capable of L1, L2 and L-Band reception, aircraft installation is minimal. Photogrammetry, LIDAR, SAR, and other Remote Sensing and Aerial Survey applications can rely on the real-time, decimeter results provided by VueStar. The optional Event Latch Interface provides for seemless integration with many cameras and other aerial survey sensors.

Higher productivity
Maximizing the advantages of the global StarFire™ Network, the system provides aerial surveyors with the ability to return customer surveys in days rather than weeks, freeing up ground-based survey crews to work on other projects.

Critical tools for mission planning
Providing both pre-mission and post-mission processing, the StarPac™ Utility Software provides critical tools for mission planning. It delivers RINEX conversion, datum conversion, trajectory plotting, and output of position data in a number of formats, along with a quality / figure of merit for each position. Also, the optional Event Latch Interface conditions the event signal, allowing VueStar™ to operate successfully with a variety of cameras and airborne sensors. This self-powered module also contains internal de-bounce circuitry to ensure proper event timing.

Features

  Ruggedized, dual-frequency GPS receiver

  FAA-certified StarFire™ / GPS aircraft antenna

  One-year, all-area StarFire™ license

  Decimeter-level accuracy using StarFire™ corrections

  Real-time navigation at up to 25 times per second

  Patented GPS technology

  Geodetic quality, dual-frequency GPS measurements

  RTK base/rover (optional software upgrade)

  Event input for minimal data latency

 64 MB for internal data logging

  One pulse per second output

 Outputs standard NMEA messages

  Dual WAAS / EGNOS channels

  StarPac™ software tool kit

  Event Latch Interface (Optional accessory)

lLLEASING OPTION (only in US)

NAVCOM SF2040G Rovers,   SF2050G Base,    CARLSON Machine Control AutoGrade                 hardware set up,          with a Carlson Explorer 600+ SurvCE for stake out          

 
                             3 GPS receivers       $23,000

                        1 Auto Grade          $12,500

                        Exp 600+             $ 2, 500      $38,000

    Example:  36 months     $2,500 down payment,   $1250 month,     $1.00 purchase

 
    NOTE:           you will need to add RTK Bridge with or  without  UHF 

                         and activate the AUTOGRADE software)

NAVCOM     STARFIRE satellite

Subscription Service

A PRODUCT of    John Deere Corporation

The StarFire™ global subscription service provides real-time accuracy typically better than 10cm (4 inches). Its globally corrected signal is available virtually anywhere on the Earth's surface on land or sea, from 76ºN to 76ºS latitude.

To accomplish this, StarFire™ utilizes a network of more than 60 GPS reference stations around the world to compute GPS satellite orbit and clock corrections. Two completely redundant processing centers and multiple communication links ensure the continuous availability of StarFire™ GPS corrections. These corrections are broadcast via three geostationary satellites, providing worldwide coverage and enabling precise real-time navigation without the need for local ground base stations.

Methodology
The StarFire™ Network is a major advance from earlier ground-based augmentation systems because it considers each of the GPS satellite signal error sources independently. GPS satellite orbit and clock corrections are calculated from a global tracking network of dual-frequency receivers; these corrections are transmitted via Inmarsat satellite links directly to StarFire™ receivers, resulting in worldwide operation and minimal data latency. All StarFire™ dual-frequency GPS receivers measure the ionospheric delay for each satellite; tropospheric zenith delays are calculated from a multi-state time and position model aided by redundant satellite observables.

Reliability
Redundant data links, geographically separated processing hubs, and dual satellite uplink equipment ensure continuous reliable positioning. The system is inherently robust, with the ability to calculate a full set of corrections even if multiple reference stations were to become unavailable. With an uptime of 99.999%, customers can be confident of the global availability and accuracy of the system.

History

During the mid-1990’s, Deere and Company challenged NavCom with developing a proprietary, global, cost-efficient GPS correction network capable of providing greater accuracy than existing available systems.

In response, NavCom implemented a fully redundant, worldwide, dual-frequency GPS reference network that was free from regional boundaries. It also devised new processing algorithms to allow for optimal compression of GPS correction data, to reduce both satellite bandwidth needs and operating costs. Launched globally in 1999, the StarFire™ Network uses the GPS satellite system, L-band communication satellites, and a global network of reference stations to deliver real-time high precision positioning.

In 2001, NavCom formed an historic agreement with NASA's Jet Propulsion Laboratory (JPL). This partnership combined StarFire™ with JPL’s RTG (Real Time GISPSY) technology to further enhance the unique capabilities of this robust global network. During the mid-1990’s, Deere and Company challenged NavCom with developing a proprietary, global, cost-efficient GPS correction network capable of providing greater accuracy than existing available systems.

In response, NavCom implemented a fully redundant, worldwide, dual-frequency GPS reference network that was free from regional boundaries. It also devised new processing algorithms to allow for optimal compression of GPS correction data, to reduce both satellite bandwidth needs and operating costs. Launched globally in 1999, the StarFire™ Network uses the GPS satellite system, L-band communication satellites, and a global network of reference stations to deliver real-time high precision positioning.

During the mid-1990’s, Deere and Company challenged NavCom with developing a proprietary, global, cost-efficient GPS correction network capable of providing greater accuracy than existing available systems.

In response, NavCom implemented a fully redundant, worldwide, dual-frequency GPS reference network that was free from regional boundaries. It also devised new processing algorithms to allow for optimal compression of GPS correction data, to reduce both satellite bandwidth needs and operating costs. Launched globally in 1999, the StarFire™ Network uses the GPS satellite system, L-band communication satellites, and a global network of reference stations to deliver real-time high precision positioning.

In 2001, NavCom formed an historic agreement with NASA's Jet Propulsion Laboratory (JPL). This partnership combined StarFire™ with JPL’s RTG (Real Time GISPSY) technology to further enhance the unique capabilities of this robust global network.

CARLSON Explorer 600+

SurvCE data collection software

In Spanish upon request

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