TY  - GEN
A1  - Tu, Rui
A1  - Chen, Kejie
T1  - Tightly integrated processing of high-rate GPS and accelerometer observations by real-time estimation of transient baseline shifts
T2  - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
N2  - The complementary advantages of high-rate Global Positioning System (GPS) and accelerometer observations for measuring seismic ground motion have been recognised in previous research. Here we propose an approach of tight integration of GPS and accelerometer measurements. The baseline shifts of the accelerometer are introduced as unknown parameters and estimated by a random walk process in the Precise Point Positioning (PPP) solution. To demonstrate the performance of the new strategy, we carried out several experiments using collocated GPS and accelerometer. The experimental results show that the baseline shifts of the accelerometer are automatically corrected, and high precision coseismic information of strong ground motion can be obtained in real-time. Additionally, the convergence and precision of the PPP is improved by the combined solution.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 598 
KW  - high-rate GPS
KW  - accelerometer records
KW  - baseline shift
KW  - tight integration
KW  - Precise Point Positioning
Y1  - 2019
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-415182
IS  - 598
SP  - 869
EP  - 881
ER  - 
TY  - JOUR
A1  - Tu, Rui
A1  - Chen, Kejie
T1  - Tightly integrated processing of high-rate GPS and accelerometer observations by real-time estimation of transient baseline shifts
JF  - The journal of navigation
N2  - The complementary advantages of high-rate Global Positioning System (GPS) and accelerometer observations for measuring seismic ground motion have been recognised in previous research. Here we propose an approach of tight integration of GPS and accelerometer measurements. The baseline shifts of the accelerometer are introduced as unknown parameters and estimated by a random walk process in the Precise Point Positioning (PPP) solution. To demonstrate the performance of the new strategy, we carried out several experiments using collocated GPS and accelerometer. The experimental results show that the baseline shifts of the accelerometer are automatically corrected, and high precision coseismic information of strong ground motion can be obtained in real-time. Additionally, the convergence and precision of the PPP is improved by the combined solution.
KW  - High-rate GPS
KW  - Accelerometer records
KW  - Baseline shift
KW  - Tight integration
KW  - Precise Point Positioning
Y1  - 2014
U6  - https://doi.org/10.1017/S0373463314000150
SN  - 0373-4633
SN  - 1469-7785
VL  - 67
IS  - 5
SP  - 869
EP  - 880
PB  - Cambridge Univ. Press
CY  - New York
ER  - 
TY  - JOUR
A1  - Tu, Rui
A1  - Ge, Maorong
A1  - Zhang, Hongping
A1  - Huang, Guanwen
T1  - The realization and convergence analysis of combined PPP based on raw observation
JF  - Advances in space research
N2  - In order to speed up Precise Point Positioning (PPP)'s convergence, a combined PPP method with GPS and GLONASS which is based on using raw observations is proposed, and the positioning results and convergence time have been compared with that of single system. The ionospheric delays and receiver's Differential Code Bias (DCB) corrections are estimated as unknown parameters in this method. The numerical results show that the combined PPP has not caused significant impacts on the final solutions, but it greatly improved Position Dilution of Precision (PDOP) and convergence speed and enhanced the reliability of the solution. Meanwhile, the convergence speed is greatly influenced by the receiver's DCB, positioning results in horizontal which are better than 10 cm can be realized within 10 min. In addition, the ionosphere and DCB products can be provided with high precision.
KW  - GPS and GLONASS
KW  - Precise Point Positioning
KW  - Raw observation
KW  - DCB
KW  - Combine
Y1  - 2013
U6  - https://doi.org/10.1016/j.asr.2013.03.005
SN  - 0273-1177
VL  - 52
IS  - 1
SP  - 211
EP  - 221
PB  - Elsevier
CY  - Oxford
ER  -