Chapter 4

SPAN-IGM Dual Antenna

NovAtel's ALIGN® heading technology generates distance and bearing information between a “master” and one or more “rover” receivers. This information can be used by SPAN to update the inertial error estimates and improve attitude accuracy. This is particularly useful in applications with reduced motion.

SPAN-IGM Dual Antenna provides the hardware necessary to run an ALIGN baseline with a second receiver.

With SPAN-IGM, the ALIGN GNSS baseline can be used to assist the initial alignment of the SPAN solution. In addition, the ALIGN baseline solution will aid the heading solution from the receiver if the heading drifts due to slow or constant dynamics.

ALIGN is capable of a 10 Hz heading output rate when integrated with the OEM6 receiver.

4.1Installation

The hardware for SPAN-IGM Dual Antenna is installed in a manner similar to other SPAN systems. Some points to consider during your installation are:

1.Install the SPAN-IGM and the two antennas in the vehicle such that the relative distance between them is fixed.

2.The antennas should be mounted where the view of the satellites will not be obstructed by any part of the vehicle. As heading accuracy is dependent on baseline length, mount the antennas as far apart as possible. A minimum separation distance of 1 metre is recommended.

3.The lever arms, or distance from the SPAN-IGM to the antennas, needs to be fixed and accurately measured using the coordinate axes defined on the outside of the SPAN-IGM. The baseline between the two antennas does NOT need to be aligned with the vehicle axes or with the axes of the SPAN-IGM.

4.Install the secondary OEM6 receiver.

A FlexPak6 receiver can be mounted directly on top of the SPAN-IGM using the SPAN-IGM Bracket Kit (01019091).

5.Both the SPAN-IGM and the rover receiver need to be powered and connected to each other via serial ports before sending any configuration commands. It does not matter which receiver is powered on first, or how long they are both powered before sending any commands.

When a FlexPak6 receiver is mounted directly on top of a SPAN-IGM (stack up configuration), connect the SPAN-IGM to the FlexPak6 using the SPAN-IGM ALIGN interface cable (01019089). This cable provides the required communication connections and powers the SPAN-IGM.

To mount the SPAN-IGM and FlexPak6 in a stack up configuration you need the SPAN-IGM Bracket Kit (01019091).

SPAN-IGM Dual Antenna operation requires the dedicated use of a serial port on each receiver for communication between receivers.

Use the USB port to connect the receiver to the computer used to send commands and receive logs.

Figure 8, SPAN-IGM - Dual Antenna Installation on page 39 shows dual antenna configuration using a SPAN-IGM and FlexPak6.

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SPAN-IGM User Manual Rev 2

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Novatel OM-20000141 user manual SPAN-IGM Dual Antenna, Installation
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OM-20000141 specifications

The Novatel OM-20000141 is a high-performance multi-GNSS (Global Navigation Satellite System) receiver designed for various applications including precision agriculture, autonomous vehicles, and surveying. This state-of-the-art device combines cutting-edge technologies to provide accurate and reliable positioning data, making it an indispensable tool for professionals in fields that rely on geolocation.

One of the standout features of the Novatel OM-20000141 is its multi-frequency support, allowing it to receive signals from GPS, GLONASS, Galileo, and BeiDou systems. This capability significantly enhances the accuracy and reliability of positioning information, particularly in challenging environments where signal interference can occur. By utilizing multiple frequencies, the OM-20000141 can mitigate errors caused by atmospheric disturbances and multi-path signals, resulting in improved precision.

In addition to its multi-GNSS capabilities, the receiver incorporates advanced RTK (Real-Time Kinematic) technology, enabling centimeter-level accuracy. This is particularly beneficial for applications that require pinpoint geolocation, such as precision agriculture, where farmers need to optimize crop yields and resource usage. The RTK technology allows users to achieve real-time positioning corrections, making it a vital tool for surveying and construction projects that demand high precision.

The Novatel OM-20000141 also features built-in connectivity options, including Bluetooth and USB interfaces, facilitating seamless integration with other devices and systems. This connectivity is crucial for enabling real-time data sharing and remote monitoring, enhancing the usability of the device in various operational environments.

Robustness is another significant characteristic of the OM-20000141. Designed to withstand harsh conditions, the receiver features a durable housing that protects it from dust, moisture, and extreme temperatures. This resilience ensures that the device operates effectively in all weather conditions, making it suitable for outdoor applications.

Furthermore, the receiver is equipped with intelligent positioning algorithms that optimize performance in urban canyons and dense foliage areas, where traditional GNSS receivers may struggle. By leveraging these algorithms, the OM-20000141 can maintain reliable positioning even in challenging environments.

Overall, the Novatel OM-20000141 stands out as a versatile and reliable GNSS receiver, merging advanced technologies to deliver high accuracy and reliability. Its exceptional features make it an invaluable asset for professionals in various industries, enhancing their ability to achieve precise geolocation and optimize their operations.
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