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NAV-Agro RTK navigation receiver: Description, operation and technical characteristics (part two)

NAV-Agro RTK navigation receiver: Description, operation and technical characteristics (part two)

Intended use of NAV-Agro RTK navigation receiver when transmitting corrective information via the Internet from the GNSS network (RTCM transmission messages to the rover via RS232)

Using the rover

Installation of the rover on the object

The location of the receiver must meet the following requirements:

surrounding objects should not block reception of satellite signals for the receiver above 5° above the horizon.
for the receiver, it is necessary to ensure the passage of only direct UAV signals and exclude the passage of UAV signals reflected from surrounding objects;

Install the receiver on the object using its rack with magnetic fastening.

Connect the receiver according to the connection diagram given in Appendix A.

Turning the rover on and off

To turn on the receiver, it is necessary to apply a supply voltage of 5…16 V from a direct current source.

To turn off the receiver, remove the 5…16 V supply voltage from the DC source.

Rover work as intended

After turning on the rover, no later than 60 seconds after turning on, the receiver automatically determines the current coordinates, altitude and time in offline mode. Within 120 seconds of receiving a navigation solution in offline mode and receiving corrective information, the rover determines navigation data with high accuracy in RTK mode.

Navigational information is issued to the consumer via the Bluetooth interface with the name "NMEA01" and serial asynchronous port RS-232, output to the output connector "X2" (socket DB9-F, pins 2, 3, 5) of the power cable and interfaces, in the form of RMC, GGA, GNS messages of the NMEA-0183 standard. Exchange speed via the RS-232 port – 115200 bit/s.

The time of continuous operation of the rover is unlimited.

Maintenance

General instructions

The maintenance of the rover is carried out with the aim of ensuring its operability during the entire period of operation.

People who have studied the structure of the rover and the rules of its operation and who have at least III qualification group in electrical safety are allowed to service the rover.

The only system of comprehensive maintenance of the rover in operation includes the following types of maintenance:

control review;
maintenance number one.

CO is carried out by service personnel before using the rover. Labor intensity of the KO – 0.2 people·h.

TO-1 is designed to maintain the rover in good condition and is carried out once a quarter. The labor intensity of the TO-1 maintenance – 4 people·h.

All malfunctions detected during maintenance must be eliminated during the current maintenance-1.

Safety measures

When servicing, it is necessary to follow the requirements of the safety instructions for working with electrical equipment at the facilities and the instructions given in clause 2.2.

Maintenance procedure

Table 3.1 shows the content of the work performed during maintenance, the sequence and methods of their execution.

The material consumption standards for one year of rover operation are:

ethyl alcohol – 0.1 l;

cotton fabric – 1.0 m².

Table 3.1 – Rover maintenance

Content of works	KO	TO-1	Method of performance of work
External view of the rover	+	+	Check: - absence of contamination on the surface of the rover. If there is contamination, clean the surface cloth rover; - absence of external mechanical damage to the components of the rover, affecting the performance of the rover; - sealing of rover components. In the event of a violation of the sealing of the components of the rover, diagnose the rover and make a decision regarding its further use; - the state (if necessary, charging) of the battery of the tablet
Checking the condition of the cable and connectors	–	+	Disconnect the cable from the connectors of the corresponding component parts of the rover. Check the condition of the connectors of the components of the rover, rinse the connectors with alcohol. Check the condition of the cable sheath, protect damaged areas of the sheath, if any, with insulating tape. Check the condition of the cable connectors, rinse the connectors with alcohol. Connect the cable connectors to the corresponding components of the rover
Rover diagnostics	–	+	Comply with the requirements of clause 2.3
Note – "+" perform, "–" do not perform.

Deconservation, conservation (reconservation)

Deconservation

Deconserve the rover in the following sequence:

open the packing box;

remove the contents of the packing box;

open polyethylene covers;

remove the component parts of the rover.

Conservation

If it is assumed that the rover, which has already been in operation for a long time, will not be in operation, it is necessary to carry out its conservation.

Preparation for conservation:

dismantle the rover in the following sequence:
remove the SIM card from the tablet;
clean the component parts of the rover from dirt and dust;
wash the connector contacts with alcohol;
if the RTK rover receiver was exposed to moisture before conservation, dry it under normal conditions for two days;
charge the tablet battery;
perform packaging

Package should be done in the following sequence:

enclose the operating documentation in a polyethylene cover together with a bag with silica gel;
wrap the cable connectors with polyethylene film and tie them with a cable tie. Roll up the cable, secure it with a PVC tape and put it in a polyethylene bag together with a bag of silica gel;
pack all the components of the rover and, together with the bags with silica gel, put them in the appropriate polyethylene covers;
Put the packed components of the rover together with the ED kit into the packing box, cover the empty spaces with sealing material, and close the packing box with tape.

Note – Place the silica gel in the covers no earlier than one hour before packing.

Reconservation

If damage to the packaging during storage or after 3 years of storage is detected, the rover should be re-conserved in the following sequence:

carry out rover deconservation in accordance with clause 3.4.1;
recharge the battery pack of the tablet;
change the silica gel;
perform packaging in accordance with clause 3.4.2.2.

Current maintenance

General instructions

If a malfunction occurred during the operation of the rover, it is necessary to determine and eliminate the malfunction in accordance with the instructions of clause 4.3, perform a performance check in accordance with the instructions given in clause 2.3. If the failure of the rover is confirmed, it must be sent for repair.
Repair of a faulty rover is carried out by the manufacturer or by organizations authorized by the manufacturer to carry out repair work.
After the end of the warranty period, the manufacturer carries out repair work and ensures the rover's operability under a separate contract.
In case of violation of the requirements of the conditions of storage, transportation, operation or violation of the seals on the components of the rover, the restoration of the rover's operability is carried out by the manufacturing enterprise at the expense of the organization guilty of violating the corresponding requirements.

Safety measures

When carrying out current repairs of the rover, you should follow the general rules for handling electrical equipment and the instructions of clause 2.2.1.

Troubleshooting and troubleshooting

Typical malfunctions of the rover and methods of their elimination are given in table 4.1.
All other malfunctions are eliminated at the rover manufacturer or by organizations authorized by the manufacturer to carry out repair work.

Table 4.1

Signs of failure	Possible causes of malfunction	Elimination methods
The power indicator on the receiver does not light	No power is supplied to the contacts of the receiver connector	Submit voltage power supply to contacts 5.9 of the "X2" connector; power cable and interfaces Check the correctness and quality of the cable connection receiver and power supply
NMEA messages are not output via the RS-232 port	Contacts 2, 3, 5 connector "X2" cable power and interfaces are not connected to the RS-232 port of the PC	Connect PC RS-232 port to relevant contacts connector "X2" cable power and interfaces Check the correctness and quality of the cable connection to PC and receiver
There is no information from the rover on the tablet display in the NTRIP Client program window	The receiver is installed in a place where it is not provided reception of NKA signals	Set RTK rover receiver in accordance with the instructions of clause 2.4.1.
	Incorrect connection settings	Check the correctness of the entered settings: - Bluetooth interface; - connection to Caster
	The tablet does not have a SIM card	Install a SIM card with paid communication services
	Insufficient funds on the SIM card or unpaid communication services	Top up your account or insert a new SIM card with paid communication services

Storage

Preparation for storage

Additional preparation for storage of the rover, which arrived at the warehouse in a packaged form from the manufacturer, is not required. The storage period is calculated from the moment the rover is packed at the manufacturing company. The packing date is indicated on the rover label.
When transferring a rover that was in use to a warehouse for storage, it is necessary:

- carry out TO-1 in accordance with the instructions of clause 3.3.;

- carry out rover conservation in accordance with the instructions of clause 3.4.2;

- transfer the rover to the warehouse for storage.

Storage conditions

The rover is stored in a packed form in heated and ventilated rooms with air conditioning, at an ambient temperature of 5 to 40 °C and a relative humidity of no more than 80% at a temperature of 25 °C. The rover's storage period in its standard packaging – not less than 3 years.
When the rover is stored for more than 3 years, the rover is re-conserved in accordance with the instructions of clause 3.4.3.

!!! TO KEEP TECHNICAL PARAMETERS, EVERY 5-6 MONTHS IT IS NECESSARY TO CHARGE THE BATTERY UNIT OF THE TABLET IN ACCORDANCE WITH THE OPERATING DOCUMENTATION ON IT.

Transportation

The rover is transported in standard packaging by any mode of transport in accordance with the rules established for this mode of transport, when transported by air transport – in heated compartments. (hermetic)
Rover is transported in regular packaging by road transport on all types of roads for a distance of at least 5,000 km, including:

- by highway, not less than 2500 km;

- on a dirt road, not less than 2000 km;

- off-road, not less than 500 km.

During transportation, the rover in standard packaging is fixed in such a way that during transportation there are no shifts and impacts.
In the case of transporting the rover on an open platform (vehicle), the rover must be protected from the effects of atmospheric precipitation in its standard packaging.

Disposal

The component parts of the rover are safe for life and health of people and the environment.

After the end of the rover's designated service life, indicated on the label NAV-Agro RTK ET, the rover is subject to disposal, which is carried out in accordance with the rules approved in the prescribed manner in the organization where the rover is operated.

Warranty obligations

Warranty conditions

The manufacturer guarantees the rover's compliance with the requirements of the current design documentation for 12 months from the date of delivery, subject to the consumer's compliance with the conditions and rules of storage, transportation, installation and operation.

Warranty service includes free repair of the rover or its component parts.

!!! THE MANUFACTURER'S WARRANTY IS TERMINATED IN THE FOLLOWING CASES:

expiration of the warranty period;
non-compliance with operating and storage conditions: mechanical damage, traces of disassembly, exposure to moisture, high temperature, intense microwave radiation, aggressive substances, microflora, insects and rodents;
damage or lack of seals on the component parts of the product;
missing or damaged signs with serial numbers on the component parts of the product.

Warranty service procedure

Warranty repair of faulty equipment is carried out at the manufacturer after a preliminary examination of it, with the drawing up of an Inspection Report, indicating the reasons for the equipment malfunction.
If the equipment fails due to the fault of the consumer, the repair or replacement of the equipment or its components is carried out at the expense of the consumer.
The warranty repair period is determined by agreement between the manufacturer and the consumer, but no more than 30 days, not including the time for delivery of defective equipment from the consumer to the manufacturer and back.
The consumer sends the defective equipment to the manufacturer by his own efforts and at his own expense. Delivery of equipment after warranty repair is carried out at the expense of the manufacturer. Delivery of equipment to the consumer after non-warranty repair is carried out at the expense of the consumer.

Appendix A
(mandatory)
Rover connection diagram

Figure A.1

A1	- NAV-Agro RTK navigation receiver;
A2	- tablet;
G3	- power source from 5 to 16 V;
1	- power cable 3.3 m;

APPENDIX B

(mandatory)

Configuring the NTRIP-Client program

NTRIP-client (client) — program for receiving packages of corrective information from the caster and transfer to the rover.

NTRIP – is a protocol based on HTTP (Network Data Transfer Protocol) used to transmit corrective information from individual base stations or networks of base stations to operate in RTK mode with mandatory user authorization.

Description of NTRIP-Client program

The NTRIP-Client program of the Lefebure for Android OS is freely distributed and can be downloaded from the PlayMarket application.

The program allows you to transmit RTK corrections from the rover base station via the Bluetooth channel.

Receiving information on the tablet via the GSM channel or WI-FI.

Startup and setup NTRIP-Client

programs

Starting the program

Start the NTRIP-Client program on the tablet (further on in the text – program), for which touch the icon on the main screen of the tablet

The main program window will open as shown in Figure 1.

Figure 1

When connected to the rover and configured parameters, the program will look like this (Figure 2)

Figure 2

The program interface has information boxes (Info Box), which display the information selected during configuration. Touching the screen in the Info Box 1 area switches the type of information displayed on the information panel - from service information to NMEA messages (Figure 3), and vice versa.

Figure 3

Program Settings

Tap to mark brings up the application settings menu (Figure 4).

Figure 4

In the Display Settings menu, the appearance and content of information on the tablet screen.

In the Receiver Setting menu, the parameters of the interface for working with the receiver are adjusted.

In the NTRIP Setting menu, the connection parameters to the caster (sources of correcting information) are configured

Display Settings

Touching the Display Settings menu brings up the settings tab for the appearance and content of information on the tablet screen (Figure 5)

In this menu, the info boxes Info Box 1, Info Box 2, Info Box 3, Info Box 4 are configured (the location of the boxes is shown in Figure 2). Touching each of the information boxes brings up a tab with a list of options for selecting the content of this information box (Figure 6).

Recommended settings:

Info Box 1 - "Correction Age" (age of amendments);

Info Box 2 - "Latitude DD.ddd" (latitude geographical);

Info Box 3 - "Elevation (Meters)" (height);

Info Box 4 - "Longitude DD.ddd" (geographical longitude).

Other menu options of this menu are intuitive and can be adjusted by the consumer at their own will. Touching the selected parameter brings up the settings panel for that parameter.

After the necessary settings, return to the settings menu (Figure 4) by touching the mark on a tablet.

Setting Receiver Settings

Touching the Receiver Settings menu brings up the receiver settings tab (Figure 7)

In this menu, you need to select the name of the Bluetooth module of the rover, with which a connection will be established (Figure 8). It should be borne in mind that before that the Bluetooth of the tablet must be paired with the rover's Bluetooth module according to the procedure described in paragraph XXXXX. Otherwise, the name of the Bluetooth module of the rover will not be displayed in the list on the tab Choose Bluetooth Device.

Other settings of the Receiver Settings menu fields are recommended to be done as follows:

Receiver Connection - "External via Bluetooth" (communication with an external receiver via Bluetooth;

Bluetooth Connection Method – "Insecure(Default)";

Auto-Enable Bluetooth – □ (disabled)

Auto-Configure Receiver – "No Auto-Config" (receiver auto-configuration)

Antenna Height - "No Offset" (height of the receiver antenna);

Save GPS Data to File – □ or ✔ (disabled or enabled).

Recording information in NMEA format received from the rover in a log file. The recording will be made in the Download folder (as a rule). The file name will look like GPS-YYYY-MM-DD.txt, for example GPS-2019-08-05.txt. During the current day, data is written to this file without interruption. Therefore, if there is a need to distribute log files, you need to turn off communication with the rover, rename the current log file using tablet editing tools, and re-enable communication with the rover. Automatically in the folder NTRIP will create a new log file named GPS-YYYY-MM-DD.txt.

Save NTRIP Data to File - □ disabled or ✔ enabled

Recording information in NTRIP format received from the base station in a log file. The recording will be made in the Download folder (as a rule). The file name will look like NTRIP-YYYY-MM-DD.txt, for example NTRIP-2019-08-05.txt. During the current day, data is written to this file without interruption. Therefore, if there is a need to distribute log files, you need to turn off communication with the rover, rename the current log file using tablet editing tools, and re-enable communication with the rover. Automatically in the folder NTRIP will create a new log file named NTRIP-YYYY-MM-DD.txt.

GPS Mock Locations – □ (disabled)

After the necessary settings, return to the settings menu (Figure 4) by touching the ◄ mark on the tablet.

NTRIP Settings

Touching the NTRIP Settings menu brings up the caster connection settings tab (Figure 9)

In the Network Protocol menu tab, select NTRIP Rev 1 (Figure 10). If None is selected in the NTRIP-Client program, the connection to the caster will be disabled

The following fields are recommended to be configured as follows:

In the field Caster IP (Caster IP address), you should enter the IP address of the caster to which the connection will be made using the virtual keyboard of the tablet.
In the Caster Port field, use the virtual keyboard of the tablet to enter the port of the caster to which the connection will be made.
In the Username field, use the tablet's virtual keyboard to enter a login to connect to the caster.
In the field Password (access password) you should enter the password to connect to the caster using the virtual keyboard of the tablet.
In the Data Stream tab (mount point), select from the list of base stations that are available on this caster, the name of the base station that will be the source of corrections for the rover.

The information to be entered in the fields Caster IP, Caster Port, Userneme, Password must be received by the user from the owner of NTRIP-caster. Based on needs, the user orders and pays for access to corrective information services that best suit his work for the most convenient period.

The mount point (mount point) is the unique name of the patch source through which NTRIP-caster is accessed.

In the Reported Location tab, select the "Get from External receiver"
The Saved Profiles field allows you to save the current settings profile in the program's internal memory or load a previously recorded one as the current one. After all the menu settings, return to the main window of the NTRIP-Client program.

Program operation

In the main window of the NTRIP-Client program, touch the button

If all the settings are made correctly, there is a connection with the rover and the caster, then the main screen of the program will have information like this (Figure 11).

Figure 11

The main window displays

-rover solution status (GPS, DGPS, Float RTK or RTK)

- age of amendments

- current latitude - 99.9999999

- current longevity - 99.9999999

- current height - 113,414m

Coordinates indicate the current location of the phase center of the rover antenna. The current service information window displays the time-related progress of program actions.

If the bar indicating the current acceptance of amendments is missing or there is no information on the amount of amendments accepted – this indicates that there is no communication with the caster or that the base station is missing (does not work). You should check the communication settings with the caster and touching the mark call up the list of caster mount points, in which touch Refresh Stream List. The NTRIP-Client program will ask the caster list - a catalog of mounting points and will display them in its window for selecting the necessary one (Figure 12).

Figure 12

In the list, you should touch the name of the necessary mounting point, after which the list will automatically close and the main window of the program will accept the corrections from the caster.

Appendix V
(required)
Exchange protocol NMEA-0183

NMEA status messages

The factory settings of the rover have the following parameters:

- set of NMEA messages issued: RMC, GGA; GNS

- speed of issuing NMEA messages – 115200 bps;

- period of issuing NMEA messages is 1 s;

- a time stamp synchronized with the GPS time scale.

The rover RTK receiver can issue the following NMEA messages via the port and Bluetooth: RMC, GGA, GNS, containing coordinates, speed, date, time data (in accordance with the NMEA-0183 standard).

GGA – GPS location data

$GGA,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x,xx,xx,xx,M,xx,М,xx,xxxx

The fields of this message are:

- hhmmss.ss – the time of navigational determinations on the UTC scale, consisting of two fixed digits of hours, two fixed digits of minutes, two fixed digits of seconds, and digits that change in the fractional part of seconds. Leading zeros are always included for hours, minutes, seconds to keep the length fixed. All values are in decimal;

- lll.ll – the width of navigation definitions, consisting of two fixed degrees degrees, two fixed digits of minutes and digits that change in the fractional part of minutes. Leading zeros are always included for degrees and minutes. All values are in decimal;

- a – character that takes the value N – for northern latitude or S – for southern latitude;

- yyyyy.yy – longitude of navigational determinations, consists of three fixed digits of degrees, two fixed digits of minutes and digits that change in the fractional part of minutes. Leading zeros are always included for degrees and minutes. All values are in decimal;

- a – a character that takes the value E – for eastern longitude or W – for western longitude;

- x – indicator of the quality of navigational determinations, one fixed number in decimal. Can take values:

- 0 – navigation definition not received;

- 1 – navigation definition received;

- 2 – observation in the differential mode;

- 4 – Fix RTK;

- 5 – Flood RTK;

- 6 – predicted observation;

- 7– time stamp issuing mode or differential station;

- xx – the number of satellites used in navigation determination;

- xx – the value of the horizontal geometric factor (HDOP), a numeric field with a floating point;

- xx – height above the geoid;

- M – height unit, meters;

- xx – the difference between the surface of the ellipsoid in the WGS-84 system and the mean sea level;

- M – unit of measurement of the difference between the surface of the ellipsoid in the WGS-84 system and the mean sea level, meters;

- xx – time in seconds since the last differential correction was received, a floating-point numeric field. The zero field is used when the differential mode is turned off – empty field;

- xxxx – differential station number, can take values from 0
to 1023, four fixed digits in decimal number – empty field.

Note – The time and date correspond to GPS time.

RMC – recommended minimum set of GPS and GLONASS data

$GNRMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,xx,xx,xxxxxx,xx,a,a*hh

The fields of this message are:

- hhmmss.ss – UTC time;

- A – status:

- A – the data is reliable;

- V – the data is invalid;

- lll.ll,a – latitude, N/S;

- yyyyy.yy,a – longitude, E/W;

- xx – speed in knots;

- xx – path angle in degrees; (the angle between the direction of the velocity vector and true north, expressed in degrees);

- xxxxxx – date: dd/mm/yy (day/month/year);

- xx,a – magnetic declination in degrees, E/W;

- a – mode indicator:

- A – autonomous solution;

- D – solution in the differential mode;

- E – data obtained by calculation;

- N – data unreliable.

GNS – GNSS location data

$GNS,hhmmss.ss,llll.ll,a,yyyyy.yy,a,c—c,xx,xx,xx,xx,xx,xxxx

The fields of this message are:

- a – character that takes the value N – for northern latitude or S – for southern latitude;

-c—c - mode indicator. It consists of several symbols (letters), each of which corresponds to a separate navigation system. The first symbol corresponds to GPS, the second to GLONASS, the third to GALILEO, the fourth and so on – others Each symbol means:

And – offline mode;

D – differential mode;

F – Float RTK;

N –no decision received;

R – RTK.

- xx – the number of satellites used in navigation determination;

- xx – the value of the horizontal geometric factor (HDOP), a numeric field with a floating point;

- xx – height above the geoid;

- xx – the difference between the surface of the ellipsoid in the WGS-84 system and the mean sea level;

- xx – time in seconds since the last differential correction was received, a floating-point numeric field. The zero field is used when the differential mode is turned off – empty field;

- xxxx – differential station number, can take values from 0
to 1023, four fixed digits in decimal number – empty field.

Note – The time and date correspond to GPS time.

APPENDIX G

RTK-Config program settings

The RTK-Config program was developed by the SmiLab company for Bluetooth connection, settings, configuration, data saving and for working with NAV-Agro RTK or SmiLab-RTK navigation receivers, receivers depending on the settings of the RTK-Config program can work in RTK rover or RTK Base mode.

Figure D

Menu and assignment of buttons in the RTK-Config program

Functions performed by the RTK-Config Android program:

1) Selecting the bluetooth of the device and connecting to the NAV-Agro RTK navigation receiver (SmiLab-RTK) via bluetooth;

2) Information about hardware and software versions;

3) Settings of world and sound indication;

4) LoRa module settings, power, operating frequencies and other ;

5) GNSS configuration - selection of RTK rover or RTK Base mode, selection of navigation systems, selection of data output frequency;

6) Current basic reference coordinates or the possibility of manually entering reference coordinates, selection of RTCM messages issued in Base mode;

7) Setting the output stream channels for the Base mode, input stream (for Rover mode), and setting the output channels of output NMEA messages;

8) Setting output of output NMEA messages;

9) Display of current coordinates with the possibility of using them as reference base coordinates for the Base mode, the status of the navigation solution, the number of visible satellites.

10) Connecting via the Internet to the NTRIP caster (server), receiving corrective messages from the NTRIP-RTK server, and transmitting these messages via Bluetooth to the NAV-Agro RTK navigation receiver.

11) Saving and loading coordinates of points, recording in a file the data received from the navigation receiver.

Video instruction- https://www.youtube.com/watch?v=G8fy9gUMlZ

APPENDIX D

Quick setting of the base station by pressing a button
(see also p.2.3)

D.1 Apply power to the NAV-Agro RTK navigation receiver

D.2 Press the button on the receiver three times, in response the receiver will beep three times, which indicates that the receiver is working in rover mode.

Note - if it is known that the receiver is already working in the rover mode, it is possible to perform clause D2 skip (to find out in which mode the receiver is currently working, you need to press the button once, if in response the sound indication sounds three times, then the receiver is working in rover mode, if four times, then in base mode, see p. 1.8.2.3, 1.8. 2.4)

D.3 After 3-5 minutes, the light indicator starts flashing twice per second, which indicates that the rover has determined the current coordinates.

D.4 To convert the current coordinates obtained in point 3 into reference coordinates of the base station, it is necessary to press the button twice, in response the sound indicator should signal one long sound signal, which indicates the successful entry of reference coordinates for the base station .

D.4.1 If the sound indicator signals twice, this indicates that the reference coordinates could not be entered, in this case, repeat step 4 after a few minutes.

D.5 Press the button four times, in response the receiver will beep four times, which indicates that the receiver has entered the base station mode. After 1-3 minutes, the base station is ready and will start transmitting RTCM messages on the configured channel (see Notes below).

Notes:
1) Sound indication must be turned on (see Appendix D).
2) In order for rovers to receive RTCM messages from the base station, there must be a correctly selected and configured transmission channel between them data, channels are configured in the RTK-Config android program, in the "Streams" menu (see Appendix D).

APPENDIX F

Setting up the SmiLab-Agro program for transmission to the NAV-Agro RTK receiver, correcting NTRIP-RTK information via the Internet, from the GNSS network

Figure G.1

To set up the SmiLab-Agro program to transmit to the NAV-Agro RTK receiver the correcting NTRIP-RTK information via the Internet, you need to perform the actions shown in Figure G.1 in the program:

Go to the settings menu;
Go to RTK Settings;
Enter the NTRIP-RTK server data and click apply;
Go to the main menu of the program, and click the button to connect to the server, which is located on the right side in the middle (picture of the rectangle of the PC system unit). The NAV-Agro RTK navigation receiver will start receiving NTRIP-RTK corrective information from the SmiLab-Agro program (the indicator of this will be a countdown of the transmitted information in the left part of the program window with the inscription "Server") and the receiver will switch to the RTK-Fix coordinate determination mode with centimeter accuracy ; (the indicator of this will be a change in the color of the satellite indicator from white (no Fix) to yellow (Float), and then to blue (Fix-RTK).