instantaneous ambiguity resolved glonass fdma attitude ...€¦ · epoch number-0.05 0 0.05 up [m]...
TRANSCRIPT
Instantaneous Ambiguity Resolved GLONASS FDMA Attitude Determination
G1 – Geodetic Theory and Algorithms --- G1.3 High-precision GNSS: methods, open problems and Geoscience applications
PJG Teunissen1,2, A. Khodabandeh3, S. Zaminpardaz4
1GNSS Research Centre, Curtin University, Perth, Australia2Geoscience and Remote Sensing, Delft University ofTechnology, The Netherlands3University of Melbourne, Melbourne, Australia4RMIT University, Melbourne, Australia
EXAMPLE
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0
0.1
0.2
0.3
0.4
0.5
ADO
P [c
ycle
]
0 3600 7200 10800 14400 18000
Epoch number
4
6
8
10
# sa
tellit
es
-0.03 -0.02 -0.01 0 0.01 0.02 0.03
East [m]
-0.03
-0.02
-0.01
0
0.01
0.02
0.03
Nor
th [m
]
0 3600 7200 10800 14400 18000
Epoch number
-0.10
0
0.10
Up
[m]
Dual-frequency, single-epoch GLONASS positioning
Instantaneous Integer-Fixed GLONASS Positioning
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-3 -2 -1 0 1 2 3
East [m]
-3
-2
-1
0
1
2
3
Nor
th [m
]
L1 GPS
-10
-5
0
5
10
Up
[m]
0 576 1152 1728 2304 2880
Epoch number
0
0.15
0.3
[cyc
le]
0 576 1152 1728 2304 2880
-0.05
0
0.05
-0.02 0 0.02
-0.02
0
0.02
Single-frequency, Single-System, GPS Single-Epoch positioning
(Perth, Australia):
JAVAD TRE-G3T DELTA receivers and Trimble TRM59800.00 antennae
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-3 -2 -1 0 1 2 3
East [m]
-3
-2
-1
0
1
2
3
Nor
th [m
]
L1 GPS + L1 GLONASS
-10
-5
0
5
10
Up
[m]
0 576 1152 1728 2304 2880
Epoch number
0
0.15
0.3
[cyc
le]
0 576 1152 1728 2304 2880
-0.05
0
0.05
-0.02 0 0.02
-0.02
0
0.02
Single-frequency, Dual-System, Single-Epoch positioning
(Perth, Australia):
JAVAD TRE-G3T DELTA receivers and Trimble TRM59800.00 antennae
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Single-frequency, Dual-System, Low-Cost, Single-Epoch positioning (Dunedin, New Zealand):
U-blox ZED F9P receivers and Trimble Zephyr 2 antennae
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-0.01 -0.005 0 0.005 0.01
East [m]
-0.01
-0.005
0
0.005
0.01
Nor
th [m
]
GPS (code & phase) + GLONASS (phase)
0 2160 4320 6480 8640 10800
Epoch number
-0.05
0
0.05
Up
[m]
-0.01 -0.005 0 0.005 0.01
East [m]
-0.01
-0.005
0
0.005
0.01
Nor
th [m
]
GPS (phase) + GLONASS (phase)
0 216 432 648 864 1080
Epoch number
-0.05
0
0.05
Up
[m]
Single-epoch Multi-epoch (10 epochs)
Mixed-receivers GLONASS Phase-only IAR: Trimble NetR9 and U-blox M8T
(Delft, The Netherlands)
The GNSS Compass Model for Direction-Finding
Solved with C-LAMBDA method(Teunissen, 2010)
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GLONASS single-frequency, single-epoch direction finding
Grey: ambiguity float solutionRed: wrong integer fixesGreen: correct integer fixes
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GLONASS single-frequency, single-epoch direction finding
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GLONASS single-frequency, single-epoch direction finding
Grey: ambiguity float solutionRed: wrong integer fixesGreen: correct integer fixes
Conclusions:
With the above performance studies, we have only presented a few of the many possible applications of the new GLONASS FDMA model (1).
Many more can be considered, such as those for long baselines, network-RTK, PPP-RTK and even for the direct combination of current GLONASS FDMA with its near-future GLONASS CDMA that is currently under development.
We therefore believe that the flexibility of the model and its close resemblance to CDMA models open up a whole variety of carrier-phase-based GNSS applications that have hitherto been a challenge for GLONASS ambiguity resolution.
1717IUGG General Assembly, 8-18 July, 2019, Montreal, Canada
Selected References
- Teunissen P.J.G. (2010): Integer least-squares theory for the GNSS compass. J Geod (2010) 84:433–447
- Giorgi et al. (2010): Testing a new multivariate GNSS carrier phase attitude determination method forremote sensing platforms.
- Giorgi et al. (2012): Instantaneous Ambiguity Resolution in Global-Navigation-Satellite-System-BasedAttitude Determination Applications: A Multivariate Constrained Approach. JOURNAL OF GUIDANCE,CONTROL, AND DYNAMICS Vol. 35, No. 1, January–February 2012
- Teunissen P.J.G. (2019): A New GLONASS FDMA Model. GPS Solutions, doi:10.1007/s10291-019-0889-0
- Teunissen P.J.G., Khodabandeh A. (2019): GLONASS Ambiguity Resolution. GPS Solutions,doi:10.1007/s10291-019-0890-7