CHASE and AVL - Automatic Vehicle Location

8/9/2019 CHASE and AVL - Automatic Vehicle Location

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Remote tracking using

GPSS on Pocket PC ...

A simple example is where the target being trackedhas a small personal tracker like the TR-101 planted on it. A text message from a

mobile 'phone will result in the tracker responding with a text message within

typically less than a minute.

The text message from the tracker will include a latitude and longitude in decimal

degrees. e.g. 51.3968 -0.6603. This could be looked up on a paper map, with a grid of

lat/lon lines printed on it, such as from google earth. Or you could type it into google

maps if you are online.

But you can also just type the lat/lon into GPSSppc running on the Pocket PC based

GPS. The destination will then be placed on the maps at the target location, and youwill be guided to it.

The information below is for the more direct, but technically more difficult,

automatic live tracking.

It seems any Pocket PC based GPS with bluetooth could be used with a bluetooth

'phone to use GPSSppc for remote tracking in "chase" mode. For an introduction to

GPSS for the Pocket PC see the GPSSppc page, and the brief GPSSppc User Guide.

Sham Bahri has managed to get GPSSppc working in "chase" mode, by using

GPSSppc running on a Pocket PC based platform, receiving both local GPS andremote GPS data over bluetooth. Details are: T-Mobile Vario (WIZA200)

Smartphone running GPSSppc v9m under WM6: Holux Slim 236 Bluetooth GPS on

COM 8 at 4800 and Remote Tracking using Sony Ericsson K800i phone as a modem

on Bluetooth COM 7 at 9600. More information on work by Sham getting GPSSppc

remote tracking to work on Pocket PC based smartphones is on the ChasePPC

page.

GPSS "CHASE" mode

For the majority of applications the GPSS PC may be fixed, within home or office.

However, it may also be mobile, as a Laptop PC which can be taken to a potentialcustomer for demonstration, or used near the target vehicle for "chase".

If the Laptop (or Car-PC) has a GPS, then GPSS can be used in it's simpler

"navigation mode" - showing your own location on the map, and providing voice

guidance to a destination. If GPSS is switched to "CHASE" mode, it will show two

symbols on the map: your own position, based on the GPS directly connected, and

the target location, based on data coming in over the 'phone network. The Laptop
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must obviously have a suitable modem for this. In

CHASE mode GPSS will show both vehicles on the

moving maps and treat the target as a destination. i.e.

the driver will receive voice guidance to the target -

which could be moving. UK Police were among the

very first users of GPSS for Covert Tracking. i.e.tracking of a vehicle without the driver knowing. The

picture on the right was from the "Put It To The Test"

UK Television programme, first broadcast in 1996,

which is on our AsOnTV page.

communications are important ...

Some applications or countries may require alternative communications to be used:

For ORBCOMM Low Orbit Satellite communications, see the ORBCOMM page.

For Inmarsat-C satellite communications, see the INMARSAT page.For Thuraya satellite communications, see the THURAYA page.

For use of other radio communications, see the RADIOpage.

For phone-to-phone tracking, see the Where R U page.

For use of GPSS with GSM SMS, see the SMS Page

For a strange example of web based tracking, see the Bottle Story page :-)

GPSS can be used with any one, or any mix of the above communications systems.

When GPSS is used in "multi-vehicle tracking" mode, it shows each of the vehicle

locations on the maps. The "Vehicles Tracked" summary shows a line for each

vehicle, and more information such as status, decoded text messages, pictures and/or

sounds, can be retrieved simply by clicking on the summary or vehicle symbols.Text reports may also be generated from stored GPS data.

Alternative 'Direction Finding' Technology

Small "bugs" or radio beacons have been used for years to track animals or used as

low cost car security devices. See the Direction Findingpage for how a computer

and GPS can be used to triangulate and chase the transmitter on the car, person,

animal or bird. This DF technology was first televised in the UK when Meridian

filmed GPSS being used to find escaped falcons. See the Finding Falcons page.

These devices have the advantage of being cheaper, and much smaller. The

disadvantage is their range is normally only a few miles, so they need to be "hunted

down" with a suitable DF receiver.

a message from Robin ...
http://gpss.npl.com/asontv.htmhttp://gpss.npl.com/orbcomm.htmhttp://gpss.npl.com/inmarsat.htmhttp://gpss.npl.com/thuraya.htmhttp://gpss.npl.com/radio.htmhttp://gpss.npl.com/radio.htmhttp://gpss.npl.com/whereru.htmhttp://gpss.npl.com/sms.htmhttp://gpss.npl.com/bottle.htmhttp://gpss.npl.com/df1.htmhttp://gpss.npl.com/df1.htmhttp://gpss.npl.com/falcondf.htmhttp://gpss.npl.com/asontv.htmhttp://gpss.npl.com/orbcomm.htmhttp://gpss.npl.com/inmarsat.htmhttp://gpss.npl.com/thuraya.htmhttp://gpss.npl.com/radio.htmhttp://gpss.npl.com/whereru.htmhttp://gpss.npl.com/sms.htmhttp://gpss.npl.com/bottle.htmhttp://gpss.npl.com/df1.htmhttp://gpss.npl.com/falcondf.htm


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We do not sell hardware or complete

solutions. We simply licence others to use

our GPS Software, GPSS.

If you wish to sell this type of remote

tracking system, or build it yourself, pleasevisit the business Page. You will see that I

ask you to get what I call "the minimum

tools of the trade" - a Laptop PC and a GPS,

and test GPSS with GPS before contacting

me via the "Quiz" on the download page.

It is best to start simply, testing GPSS in it's simplest "navigation" mode, with the

GPS connected directly to a Laptop PC running GPSS. After adding mapping for

your country, you can then move on to remote tracking tests - with my help.

Anyone in business is welcome to make one initial 'phone call to me, using a numberon the contact page, to establish if GPSS will be of any use to their business, before

investing time in these steps.

The steps we normally go through with new business contacts are:

1. Free use of GPSS, and support from me, while you test the software, with real

hardware, and demonstrate it to your existing business partners.

2. Purchase of a GPSS Demonstration Licence to enable you to demonstrate GPSS

to possible future investors, partners and customers. This is an important step for us

both.

3. Selling or exploiting GPSS-based solutions within an agreed framework.

We encourage our business partners to collaborate rather than compete, and I do

not issue demonstration licences lightly.

Our large network of "enthusiast" GPSS users can also often be of

great help - particularly to those involved in export from their own

country. These enthusiasts also help us test new developments such

as GPSS for the Pocket PC which now supports "chase" on suitable

Smartphone products.

I look forward to speaking with you soon.

Robin LovelockSunninghill UK, January 2008.

Partners licenced to use GPSS

You will find information on these companies on the partners page.
http://gpss.npl.com/ifyouare.htmhttp://gpss.npl.com/download.htmhttp://gpss.npl.com/contact.htmhttp://gpss.npl.com/gpssonce.htmhttp://gpss.npl.com/partners.htmhttp://gpss.npl.com/ifyouare.htmhttp://gpss.npl.com/download.htmhttp://gpss.npl.com/contact.htmhttp://gpss.npl.com/gpssonce.htmhttp://gpss.npl.com/partners.htm


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GPS +

Mobile

Phone forCovert

Tracking

In recent years the most popular technology for remote tracking involves a

combination of GPS receiver and mobile 'phone.

The GPS and 'phone will normally operate through glass, plastic or fabric, so is not

difficult to install (e.g. hidden near front or rear window).

It just needs a 12 volt supply, from the car battery. Typical current drain is between

0.05A and 0.2A, depending on the product and whether the GPS is switched on (e.g.

from the vehicle ignition). So even a small car's 35AH battery is often sufficient,

without installing more complex power-saving devices. Some companies obviously

specialise in hardware more suitable for covert installation. e.g. inclusion of the

battery.

AVL hardware products, such as the Falcom STEPP shown here, include

"intelligence" in addition to the GPS and mobile 'phone electronics. i.e. they include

a processor and memory to allow the product to be used in a number of different

ways.

One of the most useful features is to store the GPS locations for a number of days,

even if the vehicle is not in communication with the GPSS PC. This often provides

the lowest cost solution to the requirement, "where has that vehicle been every

minute last week ?". i.e. GPSS makes communications contact and downloads the

data when it is needed, avoiding the expense of minute-by-minute tracking. The user

can also answer the question, "where is the vehicle now ?" whenever they wish.

Hardware Components for AVL and CovertTracking

There are now many "GPS/GSM" products becoming available of smaller size amd

lower cost - such as the S-911 Personal Tracker from www.laipac.comon the left.

Another example is the G-19 Trackstar from www.sanav.com on the right. The
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Falcom STEPP, further down on the right, has been a popular product for many

years, suitable for installation in any vehicle. Typical cost of these products, for one-

off purchase including the distributor's markup is in the ballpark of 200 GBP / 300

Euro / 400 USD. Shop around and you may find new products at much lower prices

- but be careful you know exactly what you are buying.

For years many GPSS-based systems were delivered using the Falcom

A2 GPS/GSM unit pictured on the left. In recent years this was replaced

by the Falcom STEPP seen here on the right. These products include

both GPS and mobile 'phone electronics in a small container. Falcom is

based in Germany on www.falcom.de Scan Projects Solutions in Denmark, on

www.scanp.dksupply hardware including modified Falcom units able to download

stored GPS data to GPSS (see testing section below). This capability can now be

found in more recent Falcom products such as the "STEPP". This supports both

dialup facilities including recorded history using the SIM card data line and SMS

capability using the voice line (see "the SIM card" below). Distributors for Falcom

products include Sequoia in UK on www.sequoia.co.uk. You can see their FalcomSTEPP pagehere. Azzurri in UK, once appearing on this page, no longer distribute

Falcom products. Be careful what you buy. See "STEPP2 Problems" below.

Globalsat have the TR-101 personal tracker, shown here on the left. Globalsat have

been on our Partners page for years, and their TR-101 page is here.

Before buying any product, ask the supplier if it will work with the GPS Software

from www.gpss.co.uk.

If anyone knows of other products, well-proven with GPSS, please let Robin know

via the contact page so he can update this section.

Products such as these include three elements to construct the GPS-'Phone device:1) the GPS receiver with it's antenna; 2) the mobile 'phone electronics with its

antenna; 3) electronics to connect (1) and (2) and provide

"intelligence".

For years the most popular GPS component for covert tracking

seemed to be the Garmin GPS35 - see the picture on the left. This

can be setup to output at a different speed to standard 4800 for

NMEA. e.g. 9600 for GSM and 1200 for analogue. It can also be setup to output only

the $GPRMC sentence, which carries location, speed and heading. Another popular

device was the Siemens M20 GSM Modem, which combined items (2) and (3) above

within one package. The M20 may be purchased from TDC in the UK on fax 44

1256 332810 or e-mail [email protected]. Distributors of the Wavecom in France is

also a manufacturer of GSM modems popular in this market. Garmin GPS35 and

other GPS receivers may be found on the GPS page. Voxson in Australia on

www.voxson.com had a complete solution to compete with the excellent Falcom

products. Version 5.5 and later GPSS.EXE supports the Voxson +LOG recorded

data feature. Commands to download stored GPS data from Falcom or Voxson

units appear within the section "Testing of GPSS with GPS/GSM" below.
http://www.falcom.de/http://www.scanp.dk/http://www.sequoia.co.uk/http://www.sequoia.co.uk/wireless/Combined_GSM_GPS_terminals.phphttp://www.sequoia.co.uk/wireless/Combined_GSM_GPS_terminals.phphttp://www.usglobalsat.com/item.asp?itemid=96http://www.usglobalsat.com/item.asp?itemid=96http://gpss.npl.com/contact.htmhttp://gpss.npl.com/wheregps.htmhttp://www.voxson.com/http://www.falcom.de/http://www.scanp.dk/http://www.sequoia.co.uk/http://www.sequoia.co.uk/wireless/Combined_GSM_GPS_terminals.phphttp://www.usglobalsat.com/item.asp?itemid=96http://gpss.npl.com/contact.htmhttp://gpss.npl.com/wheregps.htmhttp://www.voxson.com/


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The iTrac units by Cheng Holin in Taiwan are being used with GPSS by Secure

Tech International, listed on our Partners page. GPSS v6.6 and later supports the

proprietory &GPS message format used by the iTrac, instead of the preferred

industry-standard NMEA GPRMC format. This was the result of collaboration

between Secure Tech and Sunninghill Systems. Technical Specifications on the

iTrac are available hereand we hope to release more information in the future.

STEPP2 Problems

The Falcom STEPPII does not include "built in" capability found in earlier Falcom

products such as the A2 and first STEPP.

Falcom, based in Germany, have been making good, reliable GPS/GSM products

for many years, and have been supplying these products through their distributorsinto many of the 160 countries in which GPSS is now used. All these products,

including the first STEPP units, could be used "straight from the box", with the

required software and default settings already available. These simple, default

facilities included:

the automatic answer of a data call from any modem with live NMEA GPS

data (typically $GPGGA and $GPRMC sentences).

the automatic reply to a polling SMS such as "&REQ POS" from any mobile

phone or GSM modem with texted NMEA data.

These "built in" default facilities, which only required the solution provider toinsert a SIM card and apply 12v power, made the Falcom product line very

attractive. The more sophisticated features, such as following up a direct

GPSSDIAL.CFG connection with downloading stored "history" data, or

configuring the product to make a text position report on a regular basis, or in

response to a closed switch - were not difficult to configure - IF needed for the

particular application. The advanced features, if needed, could be setup using a

simple data cable and software plus documentation downloaded from the Falcom

web site.

The more recent STEPII product is being supplied without this built in default

capability. Furthermore, it seems that the process to do the required loading ofparameters, and maybe even software, cannot be done with a simple serial data, but

may require a "starter kit" costing two or three STEPP units. It is understood that

the STEPII has many additional features, not found in earlier Falcom products, but

that of replying to a text from any 'phone will not be available until the next

software update, planned for March 2007.
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If you intend using the STEPPII with GPSS, have your distributor configure it for

you, or make sure you are capable of doing it yourself.

getting a SIM card

These GPS/GSM tracking products need a SIM card - as does any product that

exploits the mobile 'phone network. Some suppliers will include a SIM card, but

many will not. If the product is only using SMS then almost any SIM would do, the

text messages going on the voice line. However, some products like the Falcom

STEPP support both SMS based reporting and direct dial-up connection. For this

the SIM should also have a data line. Solutions will vary between country and

'phone network provider, including some where there is a regular subsciption cost

(a "contract") at perhaps 5 GBP/month or more. One of the lowest cost options is a

"pay as you go" SIM, but you need to make sure there is an outgoing text (or 'phone

call) every few months, or the network may "switch it off". Remember your

GPS/GSM product might only be receiving calls from your GPSS computer, andtherefore not "spending money" with the SIM provider. One option I've tested with

success in UK is to buy a pay as you go Vodafone SIM at 5 GBP (total), register it,

then have a data line added, at no additional cost, other than perhaps 10 or 20 GBP

of "top up" to ensure that the occasional outgoing

texts (at least one every three months to keep it alive)

do not result in it being switched off. i.e. the GPSS

PC may dial into the STEPP, for second-by-second

tracking, or retrieval of stored data. Occasionally this

PC (or any mobile 'phone) sends an &REQ POS

message to cause it to reply with a position report

and spend perhaps 0.12 GBP.

Hardware vs

Communications Costs

Typical cost of hardware to be installed into each vehicle will obviously depend on

the product, the distributor, and how many are purchased. However, in 2003/2004

the cost of hardware such as the Falcom STEPP might be as little as 350USD in one-

off quantity. Remember that this does not include the cost of the "solution

provider" travelling to a customers' premises and installing hardware into each

vehicle - he also needs to make a profit ;-) The lowest cost solution may be a

combination of GPS and mobile 'phone. The total cost is then that of the hardware,

and the monthly rental of the 'phone. There will be an additional cost, for each

'phone call made, but this will be small if the number of calls is small. For many

anti-theft or security applications this may be sufficient. If the vehicle owner wants

to know where the vehicle has been, each minute of each day, this can achieved with

memory in the hardware. e.g. the device might be called once per day, to download


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stored locations recorded every minute of previous 24 hours. The GSM Short

Message Service (SMS) can be used to reduce the running costs for applications

(such as Taxi Fleets) that require continuous minute-by-minute tracking of the

vehicles. A GSM modem will then be needed on the GPSS PC - which could then

also be mobile.

Getting Your First GPS/GSM Prototype

If you are a business, and have already visited the business page, got the minimum

"tools of the trade" (Laptop PC and GPS for in-car tests), and registered with

Robin, you may then be ready to get your first piece of remote tracking hardware.

You might assemble it from components, or buy a complete hardware solution by

mail-order (without GPSS or installation) from a distributor of Wavecom, Falcom,

or others that build these hardware solutions.

You require a GPSS Licence

ANY USE OF GPSS FOR REMOTE TRACKING MUST BE REGISTERED.

YOU MAY NOT USE GPSS FOR DEMONSTRATION WITHOUT PERMISSION.

DEMONSTRATION TO OTHERS REQUIRES PURCHASE OF A LICENCE.

Those businesses who follow the procedure on thebusiness page, are often granted a

free licence, so they can test GPSS use for remote tracking.

The cost of GPSS licences depend on the application, and the quantity purchased.

Those who buy in quantity get a large discount.

Prices here are in GBP (Pound Sterling. 1 GBP = approx 1.5 USD)

The cost is 100 GBP per vehicle tracked - if 9 or less licences are purchased.

The cost is 50 GBP per vehicle tracked - if 10 licences are purchased (50%

discount).

Purchase in larger quantities will cost less. The discount is negotiable.

This is for vehicles tracked via radio, ORBCOMM, GSM and other mobile phonesystems.

In-Car navigation licence cost is less, at 20 GBP per vehicle, for purchase of 1

licence. So a "chase" car fitted with own GPS, chasing 1 vehicle, is 120 GBP (1 off

cost).
http://gpss.npl.com/ifyouare.htmhttp://gpss.npl.com/ifyouare.htmhttp://gpss.npl.com/ifyouare.htmhttp://gpss.npl.com/ifyouare.htmhttp://gpss.npl.com/ifyouare.htm


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first "dial-out" tests ...

You will need a modem, connecting your PC computer running GPSS to a telephone

line. e.g. the one you use for Internet access. If the modem is NOT on COM1 (e.g.

COM2) you must edit GPSS.CFG and change COM1 (e.g. to COM2).

You must also make a file GPSSDIAL.CFG holding the remote GPS/GSM unit

'phone number. An example of GPSSDIAL.CFG is :

1

Dial,ATDT12345678@9600

- where 12345678 should be replaced by the telephone number of the device.

The duration of the call may be limited, such as the example below of 59 seconds,

by use of a file DIALTIME.CFG

59

When you run GPSS it will now display two buttons [Dial] and [Hangup].

Clicking on [Dial] will dial up the remote unit, using your modem, and the black

lamp on the dial form will turn red. After perhaps 10 seconds, it should turn yellow,

as a connection is made with the modem in the remote hardware. If there is a GPS

in the remote hardware, the light should turn green, and a map be selected

automatically to show the vehicle position. GPSS should continue tracking it,

second-by-second.

If you wish, you can record the incoming GPS data for later analysis (with Control-

A Form), by hitting the % key to create a NME File

Clicking on [Hangup] will terminate the 'phone call.

DO NOT TRY TESTING SUCH AS THIS ABOVE UNLESS

YOU HAVE PERMISION AND A "1B9V" KEY CODE FROM ROBIN.

Thinking of using GPSS without permission ? If so, please visit the PIRATE Page.

Sending commands to Falcom or Voxson units

Some GPS/GSM units require to be send a "password" or particular command,

before they will send back GPS data. Additional commands are used for things like

requesting transmission of the stored GPS data (e.g. vehicle position every 1 minute

for past 24 hours).

The Falcom STEPP unit would not normally require such a command, since it

would respond with the GPS data as soon as the connection is made.
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These commands can be sent manually, by adding buttons to the GPSS Dial Form.

e.g. a second button labelled "LIVE" in GPSSDIAL.CFG

2

Dial,ATDT12345678@9600

LIVE,&REQ INT

The user clicks on "Dial" as before, to make the GPSS PC dial out through the

modem and connect with the remote unit. When the connection is made, the GPSS

"dial light" will go from red to yellow. The user then clicks on "LIVE" to send the

command "&REQ INT" to the Falcom unit, which should then immediately

respond with live GPS data (light goes green).

The equivalent command for a Voxson unit might be:

START LIVE,AT+WDMOD=0_1_0_1_1_1

- to start live data transmission, or

STOP LIVE,AT+WDMOD=0_0_0_1_1_1

- to stop the data. The Voxson unit would remain in this state, so could beconfigured to reply with live data when the connection is made. However, this may

not be best if recorded data is to be retrieved from the unit - the user might be

confused by what is live and what is recorded.

Use of other files, like CONNECT.CFG, AUTOREC.CFG, HANGUP.CFG enable

you to configure GPSS, so only one button might be needed in GPSSDIAL.CFG for

each vehicle tracked.

You can make GPSS do the LIVE automatically, by adding a file named

CONNECT.CFG holding:

1dial,ATDT12345678,&REQ INT

Before dialling, you can start GPSS recording by hitting % key. (so the recorded

GPS data can be plotted later with Control-A) You can make GPSS start recording

with the % key automatically, by adding a file name AUTOREC.CFG holding:

1

dial,ATDT12345678,FREDB

data will then be recorded to FREDB001.NME, then FREDB002.NME, etc.

Some Falcom-based systems like to be configured so that they are sent a commandtelling the remote unit to hangup the line (although this should happen

automatically when the line is hungup from the GPSS PC end). You can make GPSS

do the remote REQUEST HANGUP automatically, when you click on the Hangup

button, by adding a file named HANGUP.CFG holding

1

dial,ATDT12345678,&REQ HANGUP

(if you wish the Falcom unit to hangup the line at the vehicle end)


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Some Falcom units, such as those from Scan Project Solutions in Denmark, can

store the GPS data for later retrieval at high speed by GPSS. The data might

typically be stored every 1 minute, or when the vehicle has moved another 100 yards

- so several days movement can be retrieved when wanted. i.e. to answer the user's

question, "where has my vehicle been every minute in the past day ?".

For Falcom units the command line in GPSSDIAL would be:

GET,&REQ HIST

and for Voxson units it would be:

GET,AT+WDLOG="READ ALL"

Configuration of GPSS for remote tracking

GPSS has a very "open" design, and changes can be made in how it behaves by the

simple removal, addition, or change to files, including WAV sound files. e.g. "let me

show you something I did earlier" is implemented by playing the sound file

LETMESHO.WAV, so removal of this file will remove this spoken message. IfGPSS does not receive GPS data, it reads data from the file GPSS.NME which

simulates incoming GPS data and operator keystrokes. So replacing this file by a

simpler one (e.g. NOTHING.NME) will replace the demonstration by a default map

(or picture).

Here is a checklist of typical changes to GPSS for remote tracking:

addition of GPSSDIAL.CFG for direct dial-up use described above.

addition ofSMSH to handle incoming SMS messages.

replace GPSS.NME by NOTHING.NME or an alernative.

removal of LETMESHO.WAV - "let me show you something I did earlier...". remove or replace $$$START.WAV - "This GPS software is given free to

individuals ..."

removal or change to other sound files.

addition of $$$START.BMP (640x480x256 colours) with your own startup

logo.

Configuration for Multiple Vehicle Tracking

For technical information of Multiple Vehicle Tracking with GPSS, please visit the

MVTECH Page
http://gpss.npl.com/smsh.htmhttp://gpss.npl.com/sounds.htmhttp://gpss.npl.com/mvtech.htmhttp://gpss.npl.com/smsh.htmhttp://gpss.npl.com/sounds.htmhttp://gpss.npl.com/mvtech.htm

Documents

CHASE and AVL - Automatic Vehicle Location