RTK GPS has brought great convenience to our survey work.

However, RTK GPS keeps displaying "Single", "DGPS" or "Float", and can't get the "Fixed" status, especially when the sun is scorching and therefore the body is exhausted.

First of all, we released a solution to the "Single" state.

Maybe we'll solve these RTK problems through the next tips.Why it’s “Single”?When the RTK displays the "Single" status, it means the RTK receiver doesn't use any differential correction information to calculate the three-dimensional coordinates.

If you're using the radio mode, there could even be a haul with the connection or settings of rover.How to deal with?Check whether the bottom station is functioning normally and whether the signal light of the bottom station is flashing and transmitting signals normally.

If it isn't normal, attend step 2.If the bottom station signal flickers abnormally (the signal cannot be transmitted normally), it's getting to be that the bottom station coordinates are abnormal, and smoothly obtain the transmitting coordinates again.

At the beginning of the article, we need to say sorry to everyone, because in the original plan, we will explain the solution to the host problem during the RTK rover setup process in this article.

During the writing process, it was found that the solution of the RTK rover was basically the same as the solution of the RTK base station in the previous article, so we did not describe the solution of the RTK rover in detail.

I believe that everyone will solve the RTK GPS problem easily after studying the content of the previous article.Additional point:What needs to be reminded here is that in radio mode, the coverage range of the general external radio is less than 20km, and the coverage of the built-in radio is less than 5km.

The specific situation depends on the actual area and terrain.One more tip:If your receiver has an abnormal voice broadcast, you can troubleshoot and solve the problem from the following aspects.In the external radio mode, check whether the external radio antenna is too close to the host and cause interference.

We recommend that the transmitting antenna need to be at least two meters away from the main unit; in the built-in radio mode, check whether an extension pole is used to isolate the base of the tripod and the main unit (the built-in radio antenna cannot be in contact with the metal object on the base or the tripod), Thereby reducing the interference of metal objects on radio transmission.If necessary, you can remove the battery of the main unit, place it on a metal object (to discharge static electricity), then reinstall it and turn it on.That’s all.Learn more about RTK solution: https://www.satlab.com.se/product_category/gnss/

With the rapid development and widespread use of measurement technology, the functions and performance of RTK GPS hosts are constantly improving.

However, the product upgrade iterations that follow after each technological advancement have become unspeakable helpless for many customers.

The measurement requires high precision.

If the equipment is used carefully and basic maintenance during use, the accuracy of the equipment can be minimized.

Whether in downtowns, rural areas, mines, or on the ground or in the air, location accuracy is only part of these customer needs, such as real-time quality control and improving user experience.

Therefore, this rtk base station becomes more and more important.

We are very glad that the previous article can assist you solve the issues in RTK GPS measurement.

I hope that regardless of what brand of instrument you're using, you'll gain tons from it and improve our proficiency in RTK measurement work.The base station doesn't transmit differential signals:If the base station doesn't transmit differential signals during the establishment of the bottom station, we will troubleshoot and affect the issues from the subsequent aspects:First check the hardware and equipment settings.

We'd like to make sure that the environment where the host is found isn't problematic, including no serious obstruction, no strong electromagnetic interference, and therefore the correct settings of the hand-held parameters.

If we are using radio mode:First confirm that the differential light on the panel of the host can flash normally.

If it flashes abnormally, check the bottom station settings within the handbook again to ascertain if it's correct.

If the settings are correct but the bottom station still doesn't transmit differential, it's going to flow from to a drag with the built-in radio of the base station host (such as poor contact, etc.

We are very glad that the previous article can help you solve the problems in RTK GPS surveying.

In this article, we will focus on explaining the host problem that occurs during the installation of the RTK base station.

I hope that no matter what brand of instrument you are using, you can gain a lot from it and improve our proficiency in RTK GPS surveying work.The base station does not transmit differential signals:If the base station does not transmit differential signals during the establishment of the base station, we can troubleshoot and deal with the problems from the following aspects:First check the hardware and equipment settings.

We need to ensure that the environment where the host is located is not problematic, including no serious obstruction, no strong electromagnetic interference, and the correct settings of the handheld parameters.If we are using radio mode:First confirm that the differential light on the panel of the host can flash normally.

If it flashes abnormally, check the base station settings in the handbook again to see if it is correct.

If the settings are correct but the base station still does not transmit differential, it may be due to a problem with the built-in radio of the base station host (such as poor contact, etc.

In daily RTK surveying and mapping work, the matter of "no fixed" within the radio mode plagues many surveying and mapping personnel, affecting measurement accuracy and measurement work progress.

We glance for the breakthrough of the matter from the three aspects of RTK base station, RTK rover and link, which can assist you find how to unravel the matter to RTK quickly.Solution for the base station:From the signal transmitted by the satellite to the signal received by the receiver, there's interference from the ionosphere, troposphere, and multipath effects, leading to weak signals.

The base station should be found out during a place with good viewing space, distant from strong electromagnetic interference sources (such as high-voltage lines, signal towers, etc.).

round the base station to scale back the impact of multipath effects.

Additionally, the radio aerial should be set at a distance of quite 2 meters from the base station to avoid UHF electromagnetic radiation interference.Solution for the rover:When the space between two points on the base is brief, the system can simulate the consequences of the ionosphere and troposphere, and therefore the residual effects also can be eliminated or reduced by differential processing of observations.

However, drastic changes may occur within the air at any time, and therefore the satellite signals will have varying degrees of impact during they reach base stations and mobile stations, and the longer the baseline, the greater the impact.

With various connection methods, such as Wi-Fi, Bluetooth, NFC, and internal radio, the RTK GNSS Receiver can be operated easier and more convenient.

Also, working as an rtk base station, it supports full constellation satellite signals tracked simultaneously with 555 channels and can get stable and reliable location information in different environments.

What is an RTK?RTK (Real-Time Kinematic) real-time dynamic measurement technology is a real-time differential GPS (RTDGPS) technology based on carrier phase observations.

It is a breakthrough in the development of measurement technology.

RTK consists of base station receivers, data links, and rover stations.

The receiver consists of three parts.

Due to lack of operating experience, adverse environmental effects, or instrument aging, RTK mainframes will have many headaches.

In this article, based on experience, we summarize one of the three common RTK host problems and propose corresponding solutions.

We will talk about specific host problems about RTK base stations and rover in the following articles.

I hope this can help you to do better RTK surveying work.Host does not lock the star：If the host does not lock the star during the work process, perhaps we can troubleshoot and solve the problem from these aspects:First confirm whether our host is in an extreme environment (such as ultra-high temperature, ultra-low temperature, strong electromagnetic interference).

It should be noted that if the base station uses the built-in radio mode for a long time, it will also cause the host to overheat;Secondly, confirm whether the host has experienced strong shocks that lead to poor contact of the host antenna interface;If the above situation is good, we need to check whether the registration code has expired;After confirming that the above conditions are correct, we can try to shut down and restart at this time;If the above method is invalid, we can reset the motherboard by long pressing the function key;Furthermore, we can clear the ephemeris data and recalculate;The last method, we can try to refresh the host firmware.Learn more about RTK GPS: https://www.satlab.com.se/product_category/gnss/ 

Equipped with a dual-mode Bluetooth and NFC (Near Field Communication), the GNSS RTK receiver can provide a convenient connection and communication in field operations.

With RTK (Real-Time Kinetic) GPS, it can realize centimeter accuracy.

Besides, with an IP67 design, this equipment can handle in all kinds of harsh environment.

Introducing of the RTKRTK is brief for real time kinematics.

A GPS receiver capable of RTK takes within the normal signals from the worldwide Navigation Satellite Systems alongside a correction stream to realize 1cm positional accuracy.

GNSS includes satellites from GPS (USA), GLONASS (Russia), Beidou (China), and Galileo (Europe).

NecessityWe have many questions about how to use GNSS RTK equipment to improve field accuracy.

The most common method for RTK to achieve high accuracy is differential correction.

Of course, it is also possible to perform correction (ie post-processing) after collecting the measurements.

Although GNSS satellites can calculate position with high accuracy, many errors are introduced between the signal leaving the satellite and hitting the receiver on the ground.

Generally, corrections are effective because most sources of error (such as the atmosphere) are similar in a wide area.

Differential correction can be applied to GNSS RTK receiver-rover measurements to eliminate most errors.PrincipleThe principle is to install the base station on a known point and continuously collect GNSS data.

In the last article we talked about the solution to the RTK "Single" problem.

This time we will talk about if RTK has been in the "Float" or "DGPS" state during the measurement work, what should we do to solve this problem, obtain higher-precision RTK coordinate data, and help us better complete the measurement work .

"Float":If the instrument displays a “Float” point solution, it means that the instrument has received the signal, but it still cannot be fixed.

It may be that there is serious interference around the surveying area, such as magnetic fields, trees, etc., resulting in insufficient receiving satellites.

At this time we should find an open place to rebuild the station.

Check whether the base station and the rover are connected incorrectly, or try changing the radio channel.

Designed with a long reflectorless ranging, the SLT Series is a type of total station for sale.

With a dual-axis compensator, this equipment can provide a precision result for the surveyors and Improve work efficiency within the total station surveying.

What can the total station do?To put it simply, a total station is a combination of level, theodolite, rangefinder and measurement software functions.

It can measure target height, target included angle and height angle as well as distance measurement.

Besides, it can be calculated according to the designed function of the instrument.

What data can we get from the total station?We can get the distance data.