| Railway Track
Irregularity Measurement
Using an integrated system with
double frequency DGPS, high precision INS and four ultra-sonic
sensors the three dimensional position of railway
tracks can be derived on millimeter accuracy level. The data is especially
used to minimize the derailment risk of high speed trains.
Further information |
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Car Navigation
On the top of our institute car
several inertial sensors and
up to five GNSS antennas can be installed. Basing on this test environment
several sensor combinations( low cost/ high precision IMU, double/single
frequency GNSS, GNSS attitude systems) can be investigated for car
navigation applications.
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Attitude
Determination
Using the observations of three
or more antennas also the attitude information of an object can be calculated
basing on the interferometric principle. The attitude accuracy depends on
the availiable baseline
length. As a rule of thumb a standard deviation
of 0.1° for a 1 m baseline is achievable. In order to increase the accuracy,
availiability and data frequency an integrated system
with a GNSS attitude system and a low-cost IMU was investigated.
Further information |
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Tight Coupling
Investigations
Especially for high dynamic
applications or in a jamming environment the implementation of tightly coupled
GNSS/INS system can increase the system performance.
In several theoretical and numerical simulations the
tracking loop performance is investigated using
different loop bandwidths and inertial data generated by various inertial
measurement units. A practical test system is implemented using the LITTON
LN 200 IMU and the MITEL GNSS receiver development tool.
Further information |
Airborne Vector
Gravimetry
Gravity data is of great relevance
for many applications in geophysics, geodesy and exploration. Basing on the
specific force f measured by inertial sensors and the kinematic acceleration
calculated using GNSS observations this gravity information can be derived.
In order to close the gap in spatial resolution between terrestrial and satellite
methods currently an airborne vector gravimetry system using GNSS and a
commercial high precision strapdown INS is in development.
Further
information
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