DAAD Alumni Seminar :„Natural Hazards“
Research on natural disasters, civil defense, disaster prevention, and aid .
TECHNOLOGY INNOVATION IN THE SATELLITE
POSITIONING
AND
HYDROGRAPHY
CONTRIBUTING IN THE PREVENTION OF
NATURAL DISASTERS.
Claudia Pereira KRUEGER, Suelen Cristina Movio HUINCA, Anderson Renato VISKI
(UFPR/PPGCG/LAGEH)
Tobias BLENINGER (UFPR/PPGRHEA)
June, 2012
Introduction
• Technological innovations
technological changes of
products;
• Products and processes
not mutually exclusive,
but rather may combine.
• Innovation is fundamental
Brazil has advanced (2011);
LAGEH (2006)
Laboratory of Space Geodesy and
Hydrography
In engineering area:
geographic coordinates (ellipsoidal)
high accuracy
object movements
repeated or
continuous measurements
• baseline evolution,
• ground subsidence,
• subsidence of offshore
structures,
• land slides,
• water level variations,
• currents in coastal waters
Baseline evolution
Source: NASA (2001)
Coordinates: different technologies in Satellite Geodesy
Source: Wells (1987)
high accuracy ????
Minimize the systematic errors
in satellite positioning
multipath effect and
antenna phase center
variation
LAGEH:
02 new technologies
monitoring devices for water levels and currents
in coastal waters
LAGEH:
new products
1) establishment of a GNSS receiver antenna calibration
field (BCAL/UFPR);
2) Attenuator of the Multipath Effect (AEM-02-LAGEH).
Materials & Methods
a) The technological innovations aimed at reducing the
effect of multipath and antenna phase center variation.
Error: few cm - m
Source: Krueger (2006)
Ignoring the variations of the phase center can lead to significant vertical errors, which can even reach up to 10 cm (e.g. Menge et al., 1998).
antenna phase center variation.
vertical errors :
up to 10 cm
Source: Huinca et al (2010)
1ª. Technologie: AEM-02-LAGEH
• the property of reflecting or absorbing electromagnetic waves;
• based on the principle of MARE technology (civil)
(Electromagnetic Radiation Absorbing Materials) or
Stealth) (militar)
undetectable to radar and sonar
MARE technology
AEM- LAGEH
2ª. Technologie: BCAL/UFPR
PROBRAL:
Precise positioning and height determination by means of
GPS: Modeling of errors and transformation into physical
heights, which was funded by CAPES (Brazil) and DAAD
(Germany).
http://digbid.ubka.uni-karlsruhe.de/volltexte/10000027417
BCAL/UFPR: providing the proper parameters of these
antennas.
DRB device
Source: Huinca et al (2010)
b) The technological innovations: monitoring devices for
water levels and currents in coastal waters.
drifting buoy
(Lagrangeana platform)
Static buoy
(Eulerian platform)
Source: Visky (2010)
Vossoroca Reservoir :
located in Tijucas do Sul (25º55'40''S
and 49º11'56''W, Reference System
WGS-84), at 40 km away from Curitiba,
the capital state of Paraná, Brazil.
Results and discussion
AEM-02-LAGEH:
• Nowadays: results positive, similar;
• The third prototype has a gain of 21% for the L1 carrier
phase and 17% for the L2 carrier phase as compared with
the first prototype;
• It is a cheaper product;
AEM-02-LAGEH:
• It is recommended for situations in which aims precision
and which detects the presence of overhead signals
acting on the GPS antenna.
Source: Visky (2012)
AEM-02-LAGEH:
• It is important to use adjustable support
Source: Visky (2012)
BCAL/UFPR:
• Experiments showed that the ellipsoidal height differences
could reach values ​of 5 to 10 cm;
•
is a technological innovation – Brazil and Latin America,
it provides a new service;
• It is validated (relative calibration and absolute calibration,
performed in Germany);
PCV Dependente de Azimute e Elevação
para a Portadora L1 –
Antena TRM 22020.00+GP
PCV Dependente de Azimute e Elevação
para a Portadora L2 –
Antena TRM 22020.00+GP
• These parameters
object movements, besides the application
in the prevention of natural disasters.
• New research's about the proper parameters.
• Investigations on the influence of meteorology on the
calibration and multipath effects will be carried out.
Buoys:
Results and discussion
dh = c.a 12 cm
New prototypes are being developed following a drifting
buoy model adopted by NOAA (National Oceanic and
Atmospheric Administration).
• GPRS tracking system.
Source: Visky (2012)
• An economic product will be placed to the community.
• Enable further efficiencies in the process of monitoring
the water
Sees to the future new developments.
• One of them is a set of floats installed in bodies of water
can, in real time, indicating modification of the water
level to a main control station by telemetry. This station
can activate an alarm system for the region.
• The second development consists of a network of
stations with Global Satellite Navigation System (GNSS)
as well as local terrestrial positioning systems (LPS), for
the realtime monitoring of movements on the earths
surface. It is necessary a continuously registered points
and a deformationanalysis. The alerting will be based on
the online-deformation-analyses estimation moving
average and Kalman filter.
Thanks for your attention!
Obrigada!
Vielen Danke!