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Vutog Releases GPS Simulator 2.2

The Vutog GPS Simulator provides a complete suite for all your GPS simulating needs and more. It is designed to assist in developing, testing and debugging programs and equipment working with the NMEA-0183 protocol.

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January 21, 2013 (FPRC) -- This product can be used with a hardware null-modem (COM port - RS232) cable or Network for TCP/IP. Multiple connections together can be created and managed from same workspace. This is very useful which you want to test multiple devices with same or different test scenarios.

Vutog GPS Simulator acts as a GPS Receiver which works without visible GPS satellites, thus it's much more efficient when used indoors and provides significant productivity. It gives out GPS data (reception quality, speed of relocation, position, satellite constellation and more) based on the NMEA-0183 protocol of chosen version. Three different input modes of it provide you the maximum flexibility to configure NMEA Sentences in the way you want. NMEA Sentences can be selected for GPS Simulation based on your need.

Vutog GPS Simulator supports 3 input modes for GPS Device Simulation -

1. World Map Input mode
2. Log files playback input mode (Advanced NMEA Player)
3. None Input mode

In World Map Input mode, it works in tracking mode. That is, you just need to select Start Point and End Point before starting GPS simulation. The Vutog GPS Simulator starts generating NMEA Sentences with all data by auto calculation for the object movement from Start Point to End Point.

For example, for $GPRMC sentence, it auto calculates:

 the True Course based on Start Point and End Points selections
 UTC Time based on system time
 the distance travelled based on speed selected per hour
 the latitude and longitude for current point after travelled distance
 magnetic variation of same latitude and longitude
 depicts it on map
 And generates the $GPRMC.

The output NMEA Sentences can be saved to .NMEA/.TXT file or transmitted via COM port or/and TCP/IP. Any program or equipment that works with the NMEA protocol will recognize transmitted messages, created by the Vutog GPS Simulator, as data from a real GPS receiver. A certain amount of parity errors (CRC) can be introduced in the generated protocol for testing consistency of operation in navigation programs.

The Log files playback input mode provides a lots of high end capabilities to replay the stored log files. You can view analyze the tracking path (the path of object moved) on XY Plot Graph and World Map. The latitude & longitude can be viewed and plotted into Nautical Miles (NM), miles, kilometer and meter on XY axis. You can see the NMEA File (replay log file) statistics like total number of NMEA sentences, total number of $GPRMC, total number of $GPGSA etc.
Replay speed controller gives high flexibility to control the speed of NMEA replay just like a MP3 player - like 1 NMEA per Sec, 10 NMEA Per Sec or maximum speed.

This capability of saved file re-playing provides an opportunity for creating repeatable test scenarios (for example, for regression testing), which would be difficult to do with an actual GPS receiver. Also, the track of any object movement stored in a standard NMEA file can be seen on XY Graph Plot and Map.

The None Mode provides lots of capabilities to play with NMEA sentences. You can type, load and send the NMEA to TCP/IP and COM Port. You can select loop for a repetitive replay. You can also mention the delay in milliseconds among all replay passes.

Apart from this, it also provides certain utilities like CRC calculator, NMEA Sentence Selector and Logger. These are very useful while doing any GPS related development and testing work.
Advanced Docking GUI and Multithreaded environment of Vutog GPS Simulator provides a full control over GPS debugging and Testing. N number of connections can be configured from a single Vutog GPS Simulator and broadcasts the same NMEA to all connections or each connection can work separately to provide simulation to different GPS Devices at same time.
Vutog GPS Simulator provides a powerful feature list to fulfill your all GPS Simulation needs. A quick highlights for all features are below

1 Core Features

Current position information display during simulation
Multithreaded and Advanced Docking GUI for flexible and easy usage
Tree View workspace for configured communication channels
Tab based workspace for each connection
Advanced NMEA File Player with track display on XY Plot and world map
Continuous generation of NMEA sentences on world map same as a GPS Device
NMEA Simulation & broadcasting via multiple different communication channels (TCP/IP and COM Port) from single GPS Simulator at one time

2 Input Modes for GPS Simulation

2.1. NMEA Generation by Log Files Playback Input Mode
Turbo speed in loading NMEA log file
XY Track plotting based on NMEA log file
Flexible center aligned or auto adjusted XY plotting
Latitude and Longitude conversion and plot display in Nautical Miles (NM), miles, kilometer and meter
Location and Track plotting on World Map
NMEA file statistics view
Ability to parse and simulate NMEA Sentences from Log File
Replay speed controller like N NMEA per second or at maximum speed
Replay status view
Real Time Stamping for sentences from NMEA Log File
File Replay in Loop

2.2. NMEA Generation by World Map Input Mode
Latitude & Longitude generation by location selection
View and choose position with Mouse Movement
Auto-moving Map for simulation
True Course and Magnetic Variation auto-calculation
Speed configuration in KPH, MPH and KNOTS
UTC time calculation based on current system time
Satellites constellation (PRN, azimuth, elevation, SNR)
Start and End positions selection by mouse
Dilution of precision factors (PDOP, HDOP, VDOP) inputs
Altitude and Geoid Height values inputs
2D/3D selection mode (manual/automatic) inputs
Position fix mode (2d/3d/not defined) selection

2.3. NMEA Generation by None Input Mode
Send text (NMEA) to communication channel by typing without CR
Send in Loop with its interval setting
Send text (NMEA) to communication channel by typing with CR
Send raw file to communication channel

3 Logger (Tool to log file) for generated NMEA sentences

Connection wise Logger
Logger for raw NMEA Sentences
Logger for parsed NMEA Sentences
Log raw NMEA and same NMEA parsed in one file

4 NMEA Sentence selector

Connection wise NMEA Sentence selector
Select the needed sentences for generation

5 Communication channels (connection options) for GPS Simulation

2.1. Serial Port
Unlimited Serial Port connection support
NMEA Simulation through COM Port
File sending through COM Port

2.2. Network (TCP/IP)
Unlimited TCP/IP connection
NMEA Simulation through TCP/IP
File sending through TCP/IP

6 Utilities

CRC Calculator
History Manager for performed activities
NMEA Sentence selector

For regular updates and feedbacks, please follow product Blog at -

For more information on Vutog GPS Simulator, please write to us at

Send an email to Simmi Kumar of Vutog

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