The SCANTER 1002 Radar System is optimized to ensure a high level of situational awareness on land platforms in all weather conditions.
The purpose of this manual is to provide a functional description of the radar system and the transceiver hardware interface.
The manual also provides a guide to the Radar Service Tool software application
used to control and monitor the system.
1.2Warnings and safety instructions
The following outlines basic warnings and safety instructions when working on the
radar system. Further warnings and safety instructions can be found in doc. no.
970637-HT: “Warnings and Safety Instructions for Terma Radar Antenna Systems”.
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Page 7/62
Rev. A
2017-12-04
In no event, Terma A/S shall be held liable for any direct, indirect, punitive, incidental or consequential damages whatso-ever arising out of or connected with the use or misuse of its products.
Only maintenance for authorized personnel.
This radar produces low power non-ionising electromagnetic radiation. Radiation is normally
not dangerous for the human body, however precautions should be taken, and a safety
distance of 1 meter when operating should be kept.
Always disconnect power before maintaining the radar. The rotating antenna may cause
injury.
Part of the equipment may have hot surfaces. Precautions should be made.
MAINTENANCE OF THE RADAR SYSTEM
WARNING
SAFETY
FIRST
WARNINGS,
CAUTIONS AND
SAFETY
INSTRUCTIONS
AUTHORIZED
PERSONNEL
ONLY
CAUTION
CAUTION
High voltage may be present at several points of the equipment. Observe and follow all
electrical safety precautions. These voltages may cause injury or even death.
When maintaining The radar, radar and instruments must be connected to the same electrical
protective ground.
Always use ESD (Electrostatic Sensitive Device) precautionary procedures when handling
ESD marked modules. The equipment contains components sensitive to damage by
electrostatic discharge. Wrist strap connected to earth bonding point must always be used
when handling unshielded electronics. Modules must be stored in static shielding packaging
(EIA-541). Module repair must be done on a ESD workstation, by qualified personnel.
Equipment weighs about 35 kilograms and to avoid injury, use proper lifting technique, 2
person lifting or lifting aids.
WARNING
Page 8/62
Rev. A
2017-12-04
SCANTER 1002 Radar System
User’s Manual
1255194-HO
1.2.1Microwave radiation safety margins
Additional safety margins in respect of microwave radiation can be obtained by
increasing distances to the radiating antennas.
As a rule of thumb, the power density is inversely proportional to the square of the
distance from the radiating source. Thus, increasing the distance with a factor of 10
will reduce the power density with a factor of 100.
However, this is only true in the far fields distance.
•According to the ICNIRP guideline, the limit for the incident power density
level for the general public is 10 W/m
GHz and over any 6 minute period. The SCANTER 1002 radar operates
within this frequency range. The corresponding level for occupational exposure is 50 W/m
Furthermore, sector transmission is normally implemented, stopping transmission
for the parts of the antenna rotation not covering the ground surface. Also, power
sectors can be defined in which the transmitted power is reduced.
For additional safety, the SCANTER 1002 transmitter is closed down when antenna rotation is stopped.
Further information is available in doc. no. 721099-RK.
1.2.2Physical safety
Be careful and use extreme caution when removing and lifting heavy objects as this
can cause physical injuries.
For rotating machinery in normal operation, the hazard zone is inside the cover of
the radar and is not accessible for any operator.
1.3References
2
in the frequency band from 1-300
2
.
721002-DPSCANTER 1002 GSR Radar - Product Specification
357641-HOSCANTER Radar Service Tool - Operator’s Manual
357641-HISCANTER Radar Service Tool - Installation Manual
721089-RASCANTER 1000 Series Transceiver Core Software Open
721089-SCSCANTER 1000 Series Transceiver Core SW GPL Source Code
721099-RKSCANTER 1000 Series Antenna Power Density Analysis
970637-HTWarnings and Safety Instructions for Terma Radar Antenna Sys-
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Source Licenses
tems
Page 9/62
Rev. A
2017-12-04
(Intentionally left blank)
Page 10/62
Rev. A
2017-12-04
SCANTER 1002 Radar System
User’s Manual
1255194-HO
2SCANTER 1002 Radar System
Radar Service
Tool
Power
IP network
The SCANTER 1002 Ground Surveillance Radar (GSR) is designed to perform
ground surveillance of high-sensitivity areas and critical infrastructure.
The SCANTER 1002 radar is a Ku-band, 2D, fully coherent pulse compression
radar, based on Solid State transmitter technology with digital software-defined
functionality.
Both the radar transmitter and receiver, the signal processing electronics, the
embedded tracker and the antenna are enclosed inside a radome, giving an
extremely compact and portable system.
SCANTER 1002 meets the requirements for professional GSR, where detection of
slow and fast-moving targets in adverse weather conditions is required.
Terma’s proven pulse compression technology, Frequency Diversity (FD) combined with the unique discrimination between stationary and slowly moving targets
gives a truly high-end surveillance radar system.
SCANTER 1002 uses Solid State Power Amplifier (SSPA) transmitter technology,
which ensures long service life and high availability.
A receiver with low noise and superior dynamic range provides high resolution and
detailed radar images, in all weather conditions, with no need for operator intervention. Combined with the advanced moving target filtering software, the system is
able to discriminate a walking or crawling man from the background clutter, even in
rain.
An embedded tracker (ET2) using Interacting Multiple Model technology and Multi
Hypothesis Tracking is integrated in the radar unit to detect and track agile and
small targets in severe weather conditions. The tracker is also used to detect large
vessels. Information to track surface targets is obtained from a combination of normal radar and Doppler-processed signals.
Fig. 2.1 Simplified system components schematics
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Page 11/62
Rev. A
2017-12-04
Communication interface to the transceiver is established via a standard IP net-
Radome
Sun
cover
work (LAN or WAN), which provides network radar video, plots, tracks, control, etc.
Service information is obtained via the IP network.
The SCANTER Service Display (Radar Service Tool) provides an easy interface for
controlling the radar and gives detailed status and diagnostics information from the
Built-in Test Equipment (BITE). It also provides access to powerful radar imaging
and tracking information.
2.1System components
The SCANTER 1002 Radar System is mounted in an enclosure consisting of a
radome and a sun cover (see Fig. 2.2 (p. 12)). The system consists of the following
main assemblies and modules:
•Antenna system including antenna radiating the RF power (and subsequently
receiving the radar echoes), and antenna motor including azimuth encoder,
rotary joint and waveguide filter
•Transceiver including power supply module (PSU Module), transceiver module
(TR Module), processing and control module (PC Module), Motor Controller
Module, bottom plate with internal/external interfaces, and top plate holding
antenna system and GPS antenna
The antenna is a parabolic reflector with a horizontally polarized pencil beam.
It has a beam width of <4 degrees in azimuth, and the gain of the bea m is >= 32 dBi.
Page 12/62
Rev. A
2017-12-04
Fig. 2.2 SCANTER 1002 Radar System
SCANTER 1002 Radar System
User’s Manual
1255194-HO
2.2SCANTER 1002 product features
Featuring
GSR Ground Surveillance, full c oherency and frequency diversity
Freque ncy
Program mable frequencies between 17.1–17.3 GHz
4 sub-bands
Transmitter
8 W SSPA
Receiver
Digital sampling on IF in 12 bits at 200 MHz
Range cell size: 6 m (3 m at instrumented range ≤ 6 km)
External Interfaces
IP network radar s ignals
Control and m onitoring via IP network / serial connec tion ports
Design
Encapsulated, integrated unit arc hitecture
Maintenance
Remote acc ess to radar video, control and monitoring
BITE for fault m anagement and diagnosis
Antenna
Parabolic reflector
Standards
CE, IEC, UL-60950
The SCANTER 1002 technology and product features are listed in the tables
below.
•Software-defined functionality
•Frequency diversity
•Full coherency and pulse compression
•Transmitter power level control in sectors
•Environment adaptation
•Control / profiles / BITE
2.2.1Embedded tracker (ET2)
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Fig. 2.3 SCANTER 1002 product features
SCANTER 1002 is equipped with an embedded tracker (ET2), which automatically
identifies moving objects in the radar image. The tracker assigns to each object a
unique identity; determines the position, speed an d course of the object; follows the
track of the object by predicting its position from scan to scan, and makes this information available in the radar image.
Page 13/62
Rev. A
2017-12-04
The embedded tracker detects and tracks any moving object. It gives the operator
an overview of moving objects, which the normal radar video alone cannot provide.
The tracker combines the information from the different Doppler filter channels with
the scan-to-scan movements in the normal video to achieve separation of small
moving targets from ground clutter.
2.2.2Physical appearance of SCANTER 1002
Page 14/62
Rev. A
2017-12-04
Fig. 2.4 Transceiver dimensions (model)
Weight:35 kg installed
~ 50 kg packed for transportation
H x W x D850 x 500 x 500 mm installed
~ 1090 x 800 x 600 mm packed for transportation
SCANTER 1002 Radar System
User’s Manual
1255194-HO
3Functional Description
PC Module
Map interface
The SCANTER 1002 Radar System is an integrated unit containing both the radar
transceiver, power supply, embedded computer and antenna with motor and
encoder. The system is enclosed in a radome and a sun cover, which p rovide environmental protection and passive cooling.
The transceiver utilizes frequency modulation (chirping or frequency sweeping)
and pulse compression to increase the range resolution as well as the S/N (signalto-noise) ratio. This allows for transmission of long frequency-modulated chirps
with low peak power, and the ability of high range resolution and probability of
detection.
The system uses Digital Frequency Synthesis to generate chirps within the fo ur frequency bands, which can be selected by the application. The signal is generated
in the PC module, which contains the SCANTER 1002 transceiver processing section. The receiver will automatically tune to the transmitted frequency bands and
pass the received signal to the PC Module which will sample the signal, demodulate it, perform pulse compression and post-processing. This will generate radar
video used for plot extraction and tracking.
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Fig. 3.1 Transceiver block diagram
Page 15/62
Rev. A
2017-12-04
3.1Software-defined functionality
Multiple types of SCANTER radars utilize identical core software, which enables a
high level of testability, ensures deployment flexibility and makes it easy to add new
functionality.
A variety of radar signal processing techniques are available. Multiple functions,
such as automatic adaptation to weather scenarios, etc. are performed simultaneously. This, in combination with the use of multiple, identical and powerful commonplatform processing modules, leads to the concept “software-defined functionality”.
The entire processing structure is defined by software and functions relevant for the
individual application and can be invoked as appropriate. It is also possible to
switch between different modes of operation by modifying both the synthesized
transmit waveforms and receive signal processing tasks, even on the fly. All settings can be specified in a profile, making configuration easy.
In summary, the radar transceiver is configured to the application scenario, and
adaptation to the environment is highly automated.
3.2SSPA - Solid State Power Amplifier
The SSPA - Solid State Power Amplifier - for SCANTER 1002 is part of the TR
Module in the transceiver. It is designed using state-of-the-art MMIC (Monolithic
Microwave Integrated Circuit) GaAs high-power amplifiers (HPA). The SSPA
amplifies the signal to be transmitted and produces 8 watt of Ku-band microwave
power.
The power sector mode feature allows the SSPA output power to be adjustable in
azimuth sectors or turned off. This is achieved by sector wise attenuating the input
signal into the SSOA from the transmitter.
3.3Frequency diversity
One of the most difficult challenges for a GSR system is to separate a small target
from background clutter. In SCANTER 1002 this is achieved by a combination of
transmission diversity and intelligent signal processing.
The effect of the Terma SCANTER frequency diversity is to reduce fluctuation of
the echo from desirable targets, thereby enhancing targets relative to clutter. In
combination with coherent pulse compression and interference filtering, the radar
images become clear and well-suited for tracking.
A prerequisite for the frequency diversity is the ability of the transmitter to change
frequency instantaneously from chirp to chirp. The transmitter and receiver support
four sub-bands and can freely jump between these frequencies according to predefined profiles.
The advantage of using frequency diversity is that the noise and clutter will be different in the frequency bands, while the echo from the target remains con stant. This
means that the clutter can be cancelled by integrating echoes from different time
intervals and different frequencies.
Page 16/62
Rev. A
2017-12-04
Full benefit from the frequency diversity is obtainable only if dynamic characteristics are adapted to actual weather and complex clutter situations.
SCANTER 1002 Radar System
User’s Manual
1255194-HO
The sensitivity is therefore matched to the actual clutter levels, providing optimum
detection at all ranges and in all directions.
Furthermore, receivers and the processing chain have sufficient dynamic range
and all components provide sufficient resolution to handle the variety of signals
coming from small and large targets at all ranges. This contributes substantially to
the quality of the of the radar images. In addition, high resolution improves discrimination of clutter from wanted targets, thereby allowing the processing to separate
targets from clutter.
3.4Full coherency
SCANTER 1002 is fully coherent utilizing amplitude and phase information during
transmission and reception. A common, phase stable reference oscillator is used
for transmission and reception. Coherency enables pulse compression and allows
the receiver to compare the phases of the received echoes from chirp to chirp and
thereby detect if targets are moving or not, utilizing the Doppler shift.
In order to detect moving targets, SCANTER 1002 also includes Doppler processing. This improves detection of targets moving radial (moving in range) and with a
radial speed different from clutter.
Fig. 3.2 Coherency principle
3.5Pulse compression
A compact solid-state radar with low power consumption, SCANTER 1002 has a
limited peak power. In order to illuminate a target with sufficient energy for detection, it has to transmit long pulses. Unless some clever processing is used, this
would lead to a significant loss of range resolution. The SCANTER 1002 transceiver utilizes frequency modulation (chirping or frequency sweeping) and pulse compression to increase the range resolution as well as the signal-to-noise ratio.
When closely separated targets reflect these chirps, the frequency content of the
echoes from different targets at a given time will be different, as illustrated in
Fig. 3.3 (p. 18).
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Page 17/62
Rev. A
2017-12-04
Fig. 3.3 Pulse compression principle
Antenna
Transmitter
Receiver /
Processing
Power
Power
Antenna
Transmitter
Receiver /
Processing
PowerPower
PowerPower
AB
AB
Echo
Chirp wit h
frequency sweep
Equivalent
compressed power
3.6Power sector transmission
In order to avoid interference from strong echoes from large stationary targets like
buildings, mountains or ship superstructure and to reduce the risk of interfering with
other Ku-band systems, a power sector mode is available. This feature allows definition of up to 16 individual user defined sectors where the transmitted power can
be controlled. Each sector is defined as either:
•Prohibit sector
•Transmit sector
•Reduced power sector
The sectors are aligned relative to north.
Prohibit sectors take precedence over transmit sectors.
For the transmit sectors the power may be attenuated by up to 16 dB in each sec-
tor, thus providing a mode with low RF emission.
3.7Environment adaptation
Page 18/62
Rev. A
2017-12-04
A false alarm is an erroneous radar target detection caused by clutter, noise or other interfering signals exceeding the detection threshold. In general, it is an indication of the presence of a radar target when there is no valid target.
Land suppressor adjusts the sensitivity to the stationary surroundings. Scan integration of SCD - Sea Clutter Discrimination - increases the suppression of clutter
and detection of slow-moving targets.
CFAR – Constant False Alarm Rate – and other adaptation techniques provide
automatic adjustments such as false alarm rate. CFAR provides a flat noise floor also based on proprietary algorithms.
The radar can be controlled and monitored remotely in the following ways:
•In the Radar Service Tool application, a software package connects to the
transceiver via an IP network connection. From the software package all
parameters, settings, BITE measurements and errors can be accessed.
•Via an open IP network protocol, all parameters, settings, BITE measurements and errors can be accessed.
3.8.2Profiles
Profiles are predefined parameter sets used to set optimal transceiver performance
according to varying weather conditions or specific operational demands. Thus, the
16 available profiles allow the operator to adjust the radar system transmission
mode and/or receiver processing in a fast and reliable way.
The profiles eliminate the risk of maladjustment of the radar and reduce the operator need to acquire detailed knowledge about radar characteristics and meaning
as such.
At any time, the operator may set a specific radar parameter, e.g. pulse width, to
override the definition of the profile.
The profiles are selectable via the Service Display (Radar Service Tool) or per
remote IP network.
3.8.3Built-in Test Equipment (BITE)
Continuous status monitoring of a significant number of parameters/signals on
each module is performed in real time by the housekeeping system. The status of
the parameters/signals is internally assessed to initiate appropriate actions automatically to maintain operation to the extent possible if an error is detected.
The BITE reporting, see Fig. 3.4 (p. 19), clearly describes the actual event or error
and relates it to a specific module, i.e. no need for translation of code numbers. The
details of these reports will allow identification to the level of the Line Replaceable
Unit (LRU) at fault.
Fig. 3.4 Built-In Test Equipment (BITE)
At power up, the following diagnostic tests are performed:
SCANTER 1002 Radar System
User’s Manual
1255194-HO
Page 19/62
Rev. A
2017-12-04
Loading...
+ 43 hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.