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Typical Applications

This chapter introduces typical applications of TS21 receiver, and solutions for some possible issues.

 Install the radio antenna before switching the radio transceiver to transmit mode, or the radio transceiver may be damaged due to overheating. The energy to be transmitted cannot be emitted out without the antenna, which may cause the temperature rise and overheat of the radio module.

4.1 Rover operation​

Figure 4.10 TS21 as a Rover - Network Mode

Table 4.1 Devices of TS21 as a rover network mode

NO. Device Name

1 TS21 GNSS receiver

2 Ranging pole

3 Bracket for TC80

4 TC80 Controller

Figure 4.2 TS21 as a Rover - Internal Radio

Table 4.2 Devices of TS21 as a rover internal radio mode

NO. Device Name

1 TS21 GNSS receiver

2 450-470MHz radio whip antenna

3 Bracket for TC80

4 Ranging pole

5 TC80 Controller

Detailed steps of software operation:

  1. Set up TS21 according section 2.1 Setting up TS21 after all the components above are ready, ensure one battery and one SIM card are installed in TS21;

  2. Long press the power button to power on TS21;

  3. Use NFC function to launch Nuwa app. While the screen of TC80 Controller is unlocked, put TC80 Controller close to the TS21 NFC logo. The WiFi connects automatically after a beep and Nuwa is launched requesting to open the latest project. Click [OK] and start configuring TS21 from step 7. Also you can click [Cancel] to create a new project or open an existing project, and then start configuring TS21 from step 7.

  4. If using an android device without NFC function, ensure TS21 is powered on, and launch Nuwa application on the android device. Click [Project] in the main interface to create a new project or open an existing project and connect TS21 manually.

  5. Back to the main interface of Nuwa app, click [Device] -> [Connect] under an opened project;

  6. Select [TS21] for the Device Type, select [WiFi] for the Connect Type, click [Connect Config] to search and connect the WiFi SSID of TS21, select [TS21] for the Antenna and click [Connect] to enable communication between the android controller and TS21.

  7. Back to [Device] - > [Rover], click [New] to create a new configuration for rover.

Screenshot_20251106-100822

Figure 4.3 Rover setting interface

  1. Edit rover configuration for TS21 GNSS receiver under different data link selections. The Receiver Network and PDA Network have three protocol options respectively: Ntrip, TCP and Tersus Caster Service (TCS).

Screenshot_20251105-164550

Figure 4.4 Rover configuration - Internal Radio

Screenshot_20251106-100749

Figure 4.5 Rover configuration - Receiver Network (TCS)

Screenshot_20251105-174546

Figure 4.6 Rover configuration - Receiver Network (Ntrip)

Screenshot_20251105-174546

Figure 4.7 Rover configuration - PDA Network (Ntrip)

Note: Select PDANetwork when using cellular network of a PDA such as TC80 Controller.

  1. After filling the information for the above configuration, click [OK]. Select this configuration in the work mode list and click [Start] to start data transmission for rover which is shown as below.

Screenshot_20251105-153122

Figure 4.8 Link status of Rover using internal radio

4.2 Static survey​

Detailed steps of software operation:

  1. Long press the power button to power on TS21;

  2. Use NFC function to launch Nuwa app. While the screen of Controller is unlocked, put Controller close to the TS21 NFC logo. The WiFi connects automatically after a beep and Nuwa is launched requesting to open the latest project. Click [OK] and start configuring TS21 from step 6. Also you can click [Cancel] to create a new project or open an existing project, and then start configuring TS21 from step 6.

  3. If using an android device without NFC function, ensure TS21 is powered on, and launch Nuwa application on the android device. Click [Project] in the main interface to create a new project or open an existing project and connect TS21 manually.

  4. Back to the main interface of Nuwa app, click [Device] -> [Connect] under an opened project;

  5. Select [TS21] for the Device Type, select [WiFi] for the Connect Type, click [Connect Config] to search and connect the WiFi SSID of TS21, select [TS21] for the Antenna and click [Connect] to enable communication between the android controller and TS21.

  6. Click [Survey] -> [Static Survey], fill in the parameters of interval, cutoff angle, and etc. Then click [Start] to start static survey.

Figure 4.9 Static Survey configuration

  1. If the DataAutoSave function is turned on, the static data is recorded automatically in the internal storage when power up TS21 next time. You can download data file refer to section 2.3.

4.3 Tilt survey​

Tilt function is only applicable for TS21 GNSS receiver Ultimate version under rover mode.

4.3.1 Tilt initialization​

The tilt compensation of TS21 GNSS receiver Ultimate version is free of complex calibration. The tilt compensation will be initialized when the surveyor walks forward naturally for several meters after turning on the tilt compensation function. You can start tilt survey right after you walk to the survey point.

After the TS21 GNSS receiver Ultimate version is connect in Nuwa app, and we configure it working as a Rover. Click [Device] under the device functional group to enter the device information interface. Turn on the [Tilt Enable] on the device interface.

When tilt function is turned on, walk a few steps ahead, tilt the pole at any direction, then the tilt icon in the Survey screen turns green which indicates tilt compensation is valid. Now you can start tilt survey.

When the tilt compensation is valid, click the Satellite info icon to view the detailed information of tilt compensation including tilt status, tilt direction, tilt angle, heading and their quality index. Among them, the tilt direct indicates which direction is tilted, that is, the angle between the projection of the ranging pole on the ground and the north direction after tilting; the tilt angle indicates the degree of tilt, that is, the angle between the tilted pole and the vertical direction; Heading indicates the surveyor's orientation (the facing of TS21's back, we consider TS21's panel is always facing the surveyor).

Figure 4.10 Detailed information of tilt compensation

4.3.2 Tilt survey​

After turning on [Tilt Enable] and tilt initialization is finished, enter Survey interface and start tilt survey.

The tilt status is displayed at the top of the survey interface. When the tilt status is ON, it is considered that the tilt compensation accuracy is high and it is in a usable state. You can start survey using the tilted ranging pole. Please ensure that the antenna height setting is correct which will affect the tilt measurement results.

Figure 4.11 Tilt status is ON

When the status is displayed as N/A and blinking, it is considered that the accuracy of tilt compensation is reduced and it is in a state that is not recommended. At this time, the tilt indicator of the TS21 Ultimate OLED display turns flashing red. This may be caused by the surveyor standing for too long, rotating the ranging pole, or hitting the ranging pole to the ground. When the status is N/A, you need to redo the initialization. Generally, you do not need to stand still, just hold the ranging pole and walk forward to the next point, the initialization is complete automatically.

Note: during the tilt survey, please keep the TS21 OLED display facing the surveyor as much as possible. Please do not rotate the pole or hit the pole to the ground, which will invalidate the initialization or affect the accuracy of the tilt compensation. In addition, during the tilt point survey, if it does not continue at the third epoch reached when it is set smoothing 5 epochs for surveying points, please check whether the tilt compensation is invalid. It is not allowed to continue to complete the survey in the case where the tilt initialization accuracy is low.

4.4 Issues and solutions​

This section lists possible issues and effective solutions to solve them. Please read this section before contacting Tersus technical support.

  1. TS21 GNSS receiver cannot receive satellite signals.

Solution:

(1) Change the survey environment, and restart TS21 in an open space.

(2) Reset the GNSS module by Reset button in Device interface.

1.  The communication between Nuwa and TS21 fails.

Solution:

(1) Check whether the TS21 is powered on;

(2) Re-search and connect the WiFi;

(3) Upgrade Nuwa to the latest version.

1.  There is no correction data for rover when using receiver network Ntrip work mode.

Solutions:

(1) Check whether the IP address, port, user name, password is correct.

(2) Try to connect to CORS via controller network and receive correction data to ensure there is no issue on CORS service, then switch back to receiver network mode.

(3) Check whether the 4G SIM card is properly installed, and whether it can be used normally.

(4) Go to [Device] - [Cellular], check the registration status of the network. Try entering APN name and restarting cellular module.

(5) Try to log in with the same configuration and get a compared result if there is an extra receiver.

1.  How to export static observation data from TS21?

Solutions:

(1) Connect TS21 receiver with a computer through a USB Type-C cable.

(2) The computer detects the TS21 receiver as an external disk.

(3) Open the \Data\record folder, find the trs file and rinex file in its storage according to recording date.

(4) Copy the static observation data and paste them to the designated folder in your computer.

1.  How to apply Geoid model file correctly?

Solutions:

(1) Prepare the Geoid file at first and placed in the path of Internal storage\TersusSurvey\Geoid.

(2) Next step, launch Nuwa and go to select Project - Current Project and edit Coordinate System. Find the Height Fitting - Geoid and select Geoid, or directly download Geoid files from Tersus server after clicking More.

1.  How to configure TS21 serial port output NMEA log?

    **Solutions**:

    Nuwa can configure to output NMEA by the NMEA option. It can be specified the Baud Rate, the kind of sentence.

2.  A base receiver is working well, the rover receiver cannot get correction data via UHF, how to fix this?

Solutions:

(1) Check whether the radio antenna connects well with receiver. Carefully check whether the interface is tightened.

(2) Check whether the air baud rate, Protocol, Bandwidth, Frequency match right with that of the base receiver.

(3) Switchover the radio frequency to avoid the possible interference from nearby devices.

(4) Get a compared result when an extra receiver is configured as rover with the same settings.

1.  The TS21 rover works at a short distance (not normal distance) at the radio mode?

Solutions:

(1) Check whether the rover connects a radio antenna.

(2) Adjust the radio of base at the high power gear.

(3) Check the environment if there exists radio interference along the propagation line.