TEST ROUTE DESCRIPTION

ATR TRACK III: THE REAL – TIME GPS
FOR PUBLIC SECURITY
Janusz KWIECIEŃ
Marcin MALINOWSKI
Sławomir BUJNOWSKI
Adam BUJARKIEWICZ
University of Technology and Agriculture
Bydgoszcz Poland
ABSTRACT
GPS
In the project a system was developed, that visualizes real time GPS
navigation data over the public security system. Vehicles equipped
with a GPS/GSM unit can connect to the security system via internet
and multiple viewer users can track their motion in real-time. A clientserver system passes GPS position data from the vehicles on the GIS
editor and vector/raster MultiViewer application.
GSM
Center
BTS
ATR Track III EQUIPMENT
ATR Track III
IP 1
ATR Track III
System has 3 functional modules:
• GPS / GPRS / I/O integrated unit with 16 channel GPS receiver,
GSM/GPRS modem and digital input/output for optional sensors (i.e.
alarm signals Fig.2)
• MultiViewer GPS Server – central unit for system monitoring (Fig.1 and
Fig.3)
• MultiViewer GIS Integrator console (Fig.4)
IP 3
ATR Track III
INTERNET
IP 2
INTERNET
MultiViewerGIS
Integrator
MultiViewer
GPS SERVER
MultiViewerGIS
Integrator
VEHICLE EQUIPMENT
MultiViewerGIS
Integrator
MultiViewerGIS
Integrator
Fig. 1. The ATR TRACK III system architecture
GSM antenna
input
HOW DOES IT WORK?
GPS antenna
input
I/O data port
RS232
GSM/GPRS
MODEM
16 channel
GPS receiver
Fig. 2. GPS / GPRS / I/O integrated unit of ATR Track III
ATR Track III is based on mobile stand-alone terminals, which combine
GPS technology to determinate their own position. GSM wireless networks
set a two-way communication between the mobile unit and control center.
ATR Track III devices use GSM/GPRS modem to connect with internet,
then this medium allows to send position data and get messages from
remote server.
After connecting to internet, ATR track III devices retrieve MultiViewer
GPS Server basing on defined IP number and try to log in. If IP of device
is coincident to the list numbers define on server then it is accepted to
service. The MultiViewer GPS Server start up to collect position data and
make them available to outside clients. Every user equipped with
MultiViewer GIS Integrator console can connect to server by internet and
to receive position data from the whole fleet.
Fig. 4. MultiViewer GIS Integrator console
Fig. 3. MultiViewer GPS Server console
TEST ROUTE DESCRIPTION
Deviation of positions of ATR TRACK III in relation to road axis determined by DGPS
Field tests of the ATR Track III system were conducted in the city of Bydgoszcz.
A 25 km traverse going in one of the city district was selected. This particular stretch of the city has
significant changes in buildings and curvature, making it a suitable traverse for testing the system.
In figures 5 and 6 the comparison of ATR Track III , Magellan ProMARK X-CM GPS/DGPS positions
versus digital map coordinates is presented.
10
[m]
9
8
7
ATR TRACK III
6
5
4
3
2
1
0
0
5000
10000
15000
20000
25000
Length of route [m]
Loss of signal
8
6
PDOP
4
2
DGPS position from
Magellan ProMARK X-CM
GPS position from Magellan
ProMARK X-CM
0
0
5000
10000
15000
20000
25000
Deviation of positions of GPS Magellan ProMARK X-CM in relation to road axis determined by DGPS
10
[m]
9
8
7
Magellan ProMARK
6
5
4
3
2
1
0
ATR TRACK III position
0
5000
10000
15000
20000
25000
Length of route [m]
Multipath signal effects
8
6
PDOP
4
2
0.00
0.02
0.04
0.06
0.08
0.10
Kilom eters
0.0
1.0
2.0
3.0
4.0
0
0
5000
10000
15000
20000
25000
5.0
TERRAIN BARRIERS
Kilom eters
Legend:
Fig. 5. The whole test route
- low buildings
- high buildings
Fig. 6. The positions of ATR Track III, Magellan ProMARK X-CM
(route fragment)
Adventages of ATR Track III:
•
•
•
- open terrain
- forest terrain
no limitation of monitored vehicles,
no limitation in possibilities data access
minimalization of cost service and installation
University of Technology and Agriculture
FACULTY OF ENVIRONMENTAL AND CIVIL ENGINEERING
DEPARTAMENT OF RESOURCES ECONOMICS AND
SPATIAL INFORMATION
Address: Prof. S. Kaliskiego 7, 85-796 Bydgoszcz Poland
Tel.: (48 52) 340 84 82 Fax.: (48 52) 340 86 17
E-mail: jkw@atr.bydgoszcz.pl
Website: www.sat-gis.atr.bydgoszcz.pl