Released today, NAVsuite 3.6, enables users to enhance post-process performance in challenging GNSS conditions with quad-constellation support for OxTS’ gx/ix™ tight-coupling technology. In addition to existing support for GPS and GLONASS, gx/ix™ now tightly-couples signals from Galileo and BeiDou in post-process.
The launch of quad-constellation support for gx/ix™ will provide OxTS INS users with more accurate data, for longer. The improvement is particularly visible in conditions where GNSS signal is intermittent – such as urban canyons.
A complimentary addition to every INS purchased from OxTS, NAVsuite is used daily by hundreds of automotive test engineers and surveyors across the world to configure, monitor, post-process and analyse their INS data. NAVsuite helps to ensure OxTS INS users collect the best possible data – saving time, effort and money!
As well as quad-constellation support for gx/ix™, version 3.6 of NAVsuite also includes a number of user experience updates. These include, but are not limited to:
- Japanese language translations within NAVconfig.
- Chart in NAVsolve to show time overlap between RD and base station files
- Jerk measurements for NCOM and CAN.
You can download the latest version of NAVsuite here.
What is gx/ix™?
gx/ix™ is OxTS’ proprietary software application that provides users with an increased amount of time spent with accurate data where GNSS conditions are difficult. It is made up of OxTS’ RTK/PPK navigation processing engine and tightly-coupled integration of GNSS and Inertial Measurement Unit (IMU) sensors.
Tightly coupling the INS device’s GNSS and IMU sensors can have a positive impact on the amount of time spent with good usable position data both in real time and post-process.
Automotive Testing – As vehicle testing moves from the proving ground to the public road, Automotive Test Engineers require more accurate navigation data in non-perfect, GNSS conditions such as urban canyons and underneath tree canopies.
Quad constellation support for gx/ix™ will increase the amount of good data during test runs in these environments meaning engineers can more confidently test ADAS sensors and systems in urban and rural environments.
Survey and Mapping – For mobile mapping and LiDAR surveyors, quad constellation support for gx/ix™ will provide more time with accurate localisation data in environments where GNSS signal is difficult to obtain.
An increase in the amount of time spent with more accurate data will enable mobile mapping surveyors to more confidently report on the location of their vehicle, even in areas where GNSS signal is less than ideal, while those involved with LiDAR surveying will see an improvement in the clarity of their pointclouds over larger areas.
Key Technology Features
Make use of every visible satellite with gx/ix™ single-satellite aiding.
To compute accurate position, a GNSS receiver ordinarily needs to have direct line of sight to at least four satellites. In difficult environments like urban canyons or under tree canopies, the time spent receiving data from four satellites can be regularly interrupted.
OxTS processing algorithms take the raw GNSS measurements and integrates them into the navigation engine one satellite at a time. This process is known as ‘single satellite aiding’.
This helps stabilise the degradation of accuracy in difficult environments as it means that GNSS position data can still be used to aid the inertial measurements and navigation engine even if fewer than four satellites are available.
The addition of gx/ix™ on Galileo and Beidou gives users the ability to receive data from a much wider number of satellites therefore reducing the amount of time it takes to receive satellite signal.
RTK inertial relock
Drastically improve RTK relock time after brief GNSS signal interruptions.
GNSS signal can be lost, for example, when the INS/IMU enters a tunnel or travels underneath a bridge. Each time the process of narrowing down the possible location of the receiver must start from scratch – this process can take 20 seconds or more, leading to a significant portion of inaccurate data, multiplied by the number of bridges/tunnels the vehicle needs to travel under.
The inertial relock feature within gx/ix™ uses the inertial measurements from the onboard IMU to help the INS intelligently, and more accurately, determine it’s possible location, reducing the time it takes to reacquire RTK lock.
Using the feature can reduce the amount of time it takes for satellite signal to be reacquired from approximately 20 seconds down to less than two.
The addition of Galileo and Beidou compatibility with gx/ix™ further reduces this time by increasing the number of satellites that the GNSS receiver can use to determine its position.
When GNSS interruptions are inevitable, worsening position accuracy doesn’t have to be.
Tall buildings, tunnels, dense tree canopies and alike all make for challenging GNSS environments where multi-path, GNSS interruptions and complete outages are common.
You will be able to maintain accurate position in the face of these challenges with gx/ix™ tight-coupling technology equipped on your OxTS INS.
Read the datasheet to learn more.