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GNSS receivers operating in the single-point autonomous mode offer a horizontal accuracy of around 1.5 meters. While this might sound precise, it often experiences significant drift due to pseudorange accuracy inconsistencies and a lack of correction inputs during positioning calculations. In specific applications, like agricultural guidance systems, it isn't the absolute accuracy that counts but the relative precision across continuous epochs and adjacent paths. Discontinuities, even minor ones, can be highly problematic for users.

​In response to user feedback, we have noticed that some users encounter issues when setting the K8 GNSS module in RTK mode using the 'interfacemode' command. In this blog, we will provide a detailed explanation of these commands and their logical usage.

NMEATALKER (Sentence ID) (Talker ID) Sentence Identifier (ID): 10 sentence identifiers are available: GGA, GSA, GSV, GST, ZDA, HDT, RMC, VTG, GLL, ALL Among these 10 identifiers, the first 9 are sentence identifiers and the last one (‘ALL’) is used to fulfill the function of manipulating all the first 9 identifiers.

How to register your module/receiver? Registration status checking, After you connect device in CRU software, you can send below command to check current registration information.

Compass Receiver Utility (CRU) is professional Windows-based configuration software developed by ComNav Technology. Using the CRU software, you can convert the original observation data (cnb) into Rinex format; configure the parameters of the static collection of the receiver (only the receiver of the K7 platform is supported, the receiver of the K8 platform needs to use webUI configuration);

Low-power Anti-interference (LAI) technology is ComNav patented advanced anti-narrowband and anti-continuous-wave interference technology. The SNR can reach 60dB and the power consumption is only 0.1W when enabled. LAI technology can quickly detect and mitigate interference through simple setup to ensure the safety of equipment during operation.

In many cases, GNSS and INS are used together to provide a more accurate and reliable navigation solution. This is known as integrated navigation or GNSS/INS integration. ComNav K8-series combines the strengths of both systems, integrated navigation can be robust in challenging environments and provides continuous positioning even during short GNSS outages, here are some examples of K8 GNSS+INS performance in different environments.

The utility of GNSS technology in robotic mowers has emerged as a way to optimize mowing efficiency and accuracy. Historically, robotic mowers operated autonomously by using the local CORS or self built CORS is of high cost and continuous maintenance input. With ComNav Technology’s current robotic mower solution, it is accessible to benefit from reliable high precision service easily and cost saving- with zero operational input and highly integrated design.

Compared with general GNSS positioning, SBAS is capable of covering vast areas, increasing the accuracy and reducing position errors to less than 1m. At present, the world's leading powers have also developed their own satellite navigation systems, such as the WAAS system of the United States, the EGNOSS of the European Union, the MSAS of Japan, the GAGAN of India, the SDCM of Russia ,and the BDSBAS of China under development.

GNSS technology has brought a lot of convenience to our lives, for example autonomous driving development and CORS covering in every country, and this positive impact will be reflected in more aspects.

A GNSS module is a device that provides geolocation data by receiving signals from multiple satellites of GNSS constellation. The performance of signal acquisition and tracking directly determines PVT accuracy, so it is of great significance to evaluate the quality of GNSS data.

A GNSS receiver’s accuracy, stability and anti-interference mainly determined by a GNSS module’s various attributes such as supported signal types and quantities, speed and stability of satellite tracking, quality of original observations, positioning accuracy, etc. Thus, the better performance of a GNSS module will definitely enhance the performance of a GNSS receiver.

Dual engine RTK, just as the name implies, refers to two RTK calculation engines built on single board. From perspective of working mode, the master station and the slave station can calculate RTK result for positioning at the same time.

It is found that it takes some time for a enabled GPS module to obtain signal from enough satellites to determine its location accurately. So why? Before answering this question, firstly we have to know how many satellites need to be tracked to output positioning data.

Traditional RTK receiver is easy to implement in software. However it increases the surveyor’s burden and is not efficient and convenient, especially in case of wall corner where points are difficult to be measured or even inaccessible.

The ionosphere is generally defined as partially ionized atmospheric region roughly ranging from 60 to 1000 kilometers. Some people also regard the magnetosphere, the fully ionized atmosphere as the ionosphere. The ionosphere features a large number of free charged particles and ions, which can interfere with the intensity of electromagnetic waves propagating through the ionosphere.

The navigation and positioning of mowers are crucial for their autonomous operation. For the automatic and intelligent operation of lawn mowers, ComNav Technology provides high-precision positioning solutions.

CORS, also known as Continuously Operating Reference Stations, is one or several fixed and continuously operating GNSS reference stations, with the combination of computers, data communications and Internet (LAN/WAN) technologies to automatically provide multiple needs of users with different kinds of GNSS observations (carrier phase, pseudorange), various corrections, status and other GNSS service systems in real time.

From the users’ point of view, it is difficult to judge the algorithm when evaluating a GNSS device. This blog will introduce how to analyze the GNSS signal quality based on SNR indicator.

ComNav Technology leads to carry out PPP-B2b signal-related research and applies PPP-B2b technology and real-time Precision Point Positioning (PPP) algorithm to high-precision products, achieving real-time high-precision positioning without relying on communication networks. This is of great significance to high-precision applications in scientific research, land surveying and mapping, marine development, agriculture other fields.

This report introduces the DP-filter smooth positioning performance of K803 Lite (L1) based on the theoretical basis and test results, aiming to help users have a clear knowledge of DP-filter smooth function and related applications.

What is the accuracy of N3 in static mode?How long is the working range of internal/external radio?How many degrees of inclination N3 measures?

In the past two years, 5G went onto the stage. With the development of 5G and technology, the concept of smart city, Internet of Things and etc. are becoming more and more popular.

Except for SinoGNSS T/N series receivers mainly used for land survey, ComNav Technology has also introduced 3 levels of GNSS receivers for reference stations, including M300 Plus, M300 Pro and M300 Pro II, which can be used in CORS network, deformation monitoring and etc.

Agriculture, as an important part of the Indian economy, it contributes to less economic growth for various constraints, of which irrigation method is the major one

Since the first generation of chips and OEM GNSS modules announced in 2012, ComNav Technology adhered to technological innovation unremittingly to lead the GNSS industry and provide world-class GNSS products to global users.

In the early 2016, no well-established and nationwide CORS serving for surveyors was completed in Uganda. David Mulindwa, a sophisticated surveyor and a loyal user of ComNav Technology products, conceived a blueprint to build a CORS that covers the entire Uganda.

ComNav Technology has introduced 5 T series and N series GNSS receivers respectively since 2012. In this article we'll tell you the differences between ComNav Technology's T series and N series receiver.

One of our users from Azerbaijan applied T30 IMU GNSS receiver in a historic building restoration project to complete the preliminary mapping work, representing practical significance for historic building protection.

An excellent solution combining of Phantom 4 RTK (hereinafter referred to as P4R) and T300 Plus GNSS receiver is proposed with no image control points, short-time field work and labor-saving.