SIPEG nov 2011 INPE

siennatearfulΠολεοδομικά Έργα

25 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

60 εμφανίσεις



Integrated
GNSS
Geodynamic System for
Brazil







Icaro

Vitorello

INPE


National
Institute for Space
Research


IBGE; ON/MCT; INCRA; UNESP
-
PP; UEA; UFRN;
IAG/USP;
Poli
/USP;
UnB
; UFPR




Funds from PETROBRAS



São José dos Campos

November/2011







USE OF SPACE TECHNOLOGICAL
GROUND
-
BASED NETWORKS to
PROBe

THE DEEP EARTH’S
INTERIOR

SCOPE OF FIRST PHASE

Deployment of an integrated instrumental
system to continuously measure, monitor,
process, store, assimilate and distribute high
precision and low latency data of horizontal and
vertical geodesic positioning from permanent
and temporary GNSS stations in continental and
oceanic islands of Brazil.



ULTIMATE GOAL

document and model the continental and
oceanic lithosphere’s dynamic responses to
the tectonic forces that are acting on the
South American Plate


INFORMATION FLOW

GNSS data from each station


corrections


orbit of the satellites


ionosphere delay (TEC; scintillations)


troposphere water vapor


multipath interference


Integration with different techniques


(GGOS stations)


Models integrating GNSS velocity vectors
with mm accuracy and Earth’s internal fields


Gravity; Geomagnetic; Telluric;


Seismic travel times


EQUIPMENT & SITE REQUIRENMENTS

Equipments and mechanical support:
state
-
of
-
the art sensors and


components that were designed and built for the intended climate and


areas subjected to a high rate of deterioration, such as high


humidity in the Amazon region and salinity of the air at sites located


near the ocean.

Network configuration:

site locations to have an

homogeneous


geographic and tectonic distribution; ideally with equidistant spatial


site separation, in order to monitor translation and rotation of the


plate;

Local Geology and Monuments:
ideally construction should be in


bedrock; away from known faults; Reinforced concrete pillars for


survey monuments, at least 2m into subsurface are required in


sedimentary areas;

Weather and Sky Conditions:
The ideal meteorological parameter is a


clear and dry sky with no air pollution;

Radio Frequency, Acoustic and Electromagnetic Interference:
Sites


should not be located in the path of, or near the emitters of radio,


television, or microwave signals in the sensitive frequency regions in


the band of 1.1


1.6 GHz range; Also, explosions and the 60Hz


electrical energy noise should be avoided.



Horizon Conditions:

the viewing horizon should have a 5
-
degree
elevation and obstruction free view over 95% of the horizon.
Reflective surfaces, bodies of water, cliffs, walls and metal walls
should be avoided because of GNSS multipath interference from
structures (particularly metal), including wires separated by 15 to
25 cm and metallic fences, within 100m of the GNSS antenna.


Communications:
adequate to transmit a stream of data
electronically for rapid processing, ideally broad
-
band internet
communications for near real
-
time data transfer, instrument
control and monitoring. Must have data safeguard against
communication and power failures.


Power system & lightening protection:
robust, reliable solar
power generation with sufficient backup to maintain continuous
operation; underground cable guides to avoid impacts or damage
by lightening.


Site Security and Safety:
to protect the equipments and
monuments that might be destroyed, vandalized, or stolen.



Basic Topology of Integrated GNSS System

Permanent Stations / Data repository, analysis & web


DATA GATHERING INFRASTRUCTURE

Ground
-
based co
-
located multipurpose sensors for
continuous monitoring of the Earth’s surface changes


multi
-
frequency GNSS
receiver (Trimble Net
-
R8)


choke
-
ring antenna



three component vector
fluxgate magnetometer,


two component telluric
sensor (electrodes),


three component
atmospheric parameter
sensor (temperature,
pressure and humidity).

HIGH PERFORMANCE TWIN COMPUTER SYSTEM

São José dos Campos &
Cachoeira

Paulista

(SP)

HOMOGENEOUS GEOGRAPHIC DISTRIBUTION

HOMOGENEOUS TECTONIC DISTRIBUTION


Geographic distribution of proposed GNSS sites showing the places of future sites in black and
stations already in operation, in other colors. The dashed red line shows the present day
magnetic equator. The colored background indicates the limits of tectonic provinces.







CRUST INSTABILITY


SEISMICITY MAP OF SOUTH AMERICA





MAGNETIC OBSERVATORIES + GGOS STATIONS


SÃO JOSÉ DOS CAMPOS (SP)


CENTRAL BRAZIL (MINAS GERAIS)

GNSS STATION: TEFÉ RIVER IN THE AMAZON



RELATED RESEARCH AND APPLICATIONS





AMAZON DENSE GNSS METEOROLOGICAL NETWORK

understanding the complex water vapor/deep convection
relationship of Amazonian rain forest.

Twenty one stations
in and around Manaus, to capture the dry
-
to
-
wet transition
and the wet season
.



GPM
-
CHUVA IOP:
Fifteen stations were deployed during
the dry season in Belem, July 2011
.



GPM
-
CHUVA VALE DO PARAIBA:
Three stations deployed
during the rainy season from September, 2011.



COLLABORATIONS

EMBRACE
-

Space weather program in Brazil.

SCINTEC PROJECT


Scintillation and TEC.

LISN


Low Latitude Ionospheric Sensor Network.

GEORED

-

Geodesy Network for Geodynamics
Research in Colombia.

PIRATA


Pilot Research Moored Array in The Tropical
Atlantic