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WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
Atmospheric Impact on GPS Observations
Project of GEODESY/GIANT
program of SCAR WGGGI
Report 2000 - 2002Prepared by Jan Cisak - project leader
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
Project Background
• Establishment of the project - Tokyo 07- 2000
• Receiving a grant from Polish Committee on Scientific Research
Warsaw 03-2001• Report in Siena coordinators meeting
Siena 07 - 2001• Presentation of first results on AGS’01
St. Petersburg 07 - 2001• Presentation of Iono WG Activities
St. Petersburg 07 - 2001• Presentation of WGGGI/GIANT Activities
Darmstadt 01- 2002• International Workshop
Warsaw 05 - 2002• WGGGI meeting
Shanghai 07 - 2002
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
International Cooperation
• Irk Shagimuratov - IZMIRAN, Kaliningrad, Russia• Yevgen Zanimonskiy - „Metrologia” Kharkov, Ukraine• Alla Zanimonskaya - „Metrologia” Kharkov, Ukraine• Reinhard Dietrich - Institut für Planetare Geodäsie
Technische Universität Dresden• Sibylle Vey - Institut für Planetare Geodäsie
Technische Universität Dresden • Henk Brolsma - Australian Antarctic Division • John Manning - National Mapping Division, Australia• Glenn Johnston - National Mapping Division, Australia• Larry Hothem - National Mapping Division
US Geological Survey • Michael Mayer - Geodetic Institute (GIK) of the University • of Karlsruhe (Germany).• Bjorn Johns - UNAVCO • Joachim Feltens - Iono_WG Chairman ESOC, Darmstadt• Norbert Jakowsky - Deutsches Zentrum für Luft- und • Raumfahrt e.V. (DLR), Institut für Kommunikation und • Navigation, NL, Neustrelitz • Uk Han - Dept. of Environmental Sci. Korea Military • Academy Seoul, Korea
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
Contribution of Polish researchers and Organizations to the project
• Jan Krynski - Institute of Geodesy and • Cartography, Warsaw• Jan Cisak - Institute of Geodesy and Cartography, • Warsaw• Marcin Sekowski - Institute of Geodesy and • Cartography, Warsaw• Wlodzimierz Baran – University of Warmia and• Mazury, Olsztyn• Andrzej Krankowski - University of Warmia and• Mazury, Olsztyn• Pawel Wielgosz - University of Warmia and• Mazury, Olsztyn• Mariusz Figurski – Warsaw University of • Technology, Warsaw• Michal Kruczyk - Warsaw University of • Technology, Warsaw
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
Studying of the repeatability of the vector components during
the ionospheric storms
STORM OF 15-18 FEB 1999
DAVIS - MAWSON permanent 24-hours obserwations
-60.0-50.0-40.0-30.0-20.0-10.0
0.010.020.030.0
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13-24 February 1999
[mm
]
DAVIS - MAWSON12:00 - 24:00 UTC
-80.0-60.0-40.0-20.0
0.020.040.060.080.0
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13-24 February 1999
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DAVIS - MAWSON12:00 - 18:00 UTC
-120.0-100.0
-80.0-60.0-40.0-20.0
0.020.040.060.0
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13-24 February 1999
[mm
]
Day-to-day changes of the Davis-Mawson baseline length (636 km)
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
Studying of the repeatability of the vector components during
the ionospheric storms
OHIGGINS - ARCTOWSKI permanent 24-hours obserwations
-6.0-5.0-4.0-3.0-2.0-1.00.01.02.03.0
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14-18 February 1999
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OHIGGINS - ARCTOWSKI00:00 - 12:00 UTC
-8.0-6.0-4.0-2.00.02.04.06.08.0
14 15 16 17 18
14-18 February 1999
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OHIGGINS - ARCTOWSKI06:00 - 12:00 UTC
-8.0-6.0-4.0-2.00.02.04.06.08.0
14 15 16 17 18
14-18 February 1999
[mm
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Day-to-day changes of the O’Higgins-Arctowski baseline length (132 km)
STORM OF 15-18 FEB 1999
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
The ionosphere in Antarctic region has considerable influence on the accuracy determination of the vectors.
Strong correlation between TEC changes and North, East and Up vector components were obtained.
The changing conditions of ionosphere mostly affect height component. The height differences obtained during the quiet and disturbed ionosphere reach a few dozen of millimeters even for 132 km long vectors (O’Higgins-Arctowski).
Because of the great dynamics of the TEC during the ionospheric storms the special attention should be paid to the differences of vectors co-ordinates obtained from semidiurnal GPS sessions.
Conclusions after the first experiments
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
6 1 6 1 . 5 6 2 6 2 . 5 6 3 6 3 . 5 6 4 6 4 . 5 6 5 6 5 . 5 6 6 6 6 . 5 6 7D O Y 2 0 0 1
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dH B O G O -LA M A 3h sessions
B O G O -JO ZE 24h sessions
E nve lope w as ca lcu la ted on the base o f IG S TE C da ily m aps.
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chi-s
quar
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24h sessions 3h sessions
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IPS Geomagnetic W arn ing
TZD from E U R E F data se ts
runn ing average 1day in terva l
BO G O -LA M A 24h sessions
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Efects of ionospheric storm on vectors in Europe
STORM OF 3 March 2001
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
DAVIS - MAWSON 636 km
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58 59 60 61 62 63 64 65 66 67
DOY 2001
RE
SID
UA
LS
mm
N
E
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DAVIS - CASEY 1398 km
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58 59 60 61 62 63 64 65 66
DOY 2001
RE
SID
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MAWSON - CASEY 2028 km
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DOY 2001
RE
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mm
N
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MACA 2028 km
050
100150200250300350400
58 59 60 61 62 63 64 65 66 67
DOY 2001
N AMB. 400%
N ABM. 800 %
% RES. AMB.
MADA 636 km
050
100150200250300350400
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DOY 2001
N AMB. 400 %
N AMB. 800 %
% RES. AMB.
DACA 1398 km
0
50
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58 59 60 61 62 63 64 65 66 67
DOY 2001
N AMB. 400%
N AMB. 800%
% RES. ABM.
MAWSON - O'HIGGINS 4624 km
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MAOH 4624 km
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DOY 2001
N AMB. 400 %
N AMB. 800 %
% RES. AMB.
MAXIONO - parameterAnd number of ambiguityVECTORS
Studying of the repeatability of the vector components during
the ionospheric stormsSTORM OF 3 March 2001
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
STORM OF 3 March 2001
2 0 2 5 3 0 3 5 4 0 4 5 5 0 5 5 6 0 6 5 7 0 7 5D O Y 2 0 0 1
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BO
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4Ant-a .grf
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EC
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MA
W1
[TE
CU
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IPS Geom agnetic W arn ing
Envelope o f V TE C varia tions w as ca lcu la ted on the baseof IG S TEC da ily m aps.
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
STORM OF 3 March 2001
6 1 6 1 . 5 6 2 6 2 . 5 6 3 6 3 . 5 6 4 6 4 . 5 6 5 6 5 . 5 6 6 6 6 . 5 6 7D O Y 2 0 0 1
-20
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sess
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s [m
m]
dH M A W 1-D A V 1 24h (636km )
E nve lope w as ca lcu la ted on the base o f IG S TE C da ily m aps.
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D O Y 2 0 0 1
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EC
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2.28
2.29
2.3
2.31
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m]
IPS Geomagnetic W arn ing
TZD from IG S data se ts (G P S output so lu tions)
TZD for D A V 1
TZD for M A W 1TZD for C A S 1
dH D A V 1-C A S 1 (1398km )
dH M A W 1-C A S 1 (2028km )
Daily solutions for heights between Antarctic stations
and tropospheric parameters from IGS solutions
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
STORM OF 3 March 2001
6 1 6 1 . 5 6 2 6 2 . 5 6 3 6 3 . 5 6 4 6 4 . 5 6 5 6 5 . 5 6 6 6 6 . 5 6 7D O Y 2 0 0 1
-20
-10
0
10
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dD
24
h se
ssio
ns
[mm
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dD M A W 1-D A V 1 24h (636km )
E nve lope w as ca lcu la ted on the base o f IG S TE C da ily m aps.
6 1 6 1 . 5 6 2 6 2 . 5 6 3 6 3 . 5 6 4 6 4 . 5 6 5 6 5 . 5 6 6 6 6 . 5 6 7
D O Y 2 0 0 1
2 0
2 4
2 8
3 2
3 6
4 0
4 4
enve
lop
e o
f V
TE
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EC
U]
2 .25
2.26
2.27
2.28
2.29
2.3
2.31
TZ
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m]
IPS Geomagnetic W arn ing
TZD from IG S data se ts (G P S output so lu tions)
TZD for D A V 1
TZD for M A W 1TZD for C A S 1
dD D AV 1-C A S 1 (1398km )
dD M A W 1-C A S 1 (2028km )
Daily solutions for heights between Antarctic stations
and tropospheric parameters from IGS solutions
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
STORM OF 3 March 2001
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
6 0 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 6 9DO Y2001
-400
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dD [m
m]
-400
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dH [m
m]dD M A W 1-D AV 1 dH M A W 1-D A V 1
P IN N A C LE (L1& L2c)
6 0 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 6 9DO Y2001
-200
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dD [m
m]
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dD D AV 1-C A S1 dH D AV 1-C A S1
P IN N A C LE (VLBL)
3Ant-a .grf
STORM OF 3 March 2001
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
Final Remarks
• Analysis of recent data does not prove considerable influence of ionosphere storm on resolved vector components
• The magnitudes of variations in vector components due to atmospheric impact seem to be dependent on data processing procedure used
• No correlation between the strength of ionospheric storms and variability of vector components derived from GPS data was observed
• Further investigations on– software applied for data processing– parametrization– data modelingare needed to study atmospheric impact
on GPS solutions
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
PAPERS PUBLISHED / PRESENTED (1)
• Krankowski, A., Baran, L.W., Shagimuratow, I.I., Cisak, J., (2001): Influence of Ionosphere in Arctic and Antarctic Regions on GPS Positioning Precision, SCAR Report, Publication of the Scientific Committee on Antarctic Research, Scott Polar Research Institute, Cambridge,UK
• Baran, L.W., Wielgosz, P., Cisak, J., Shagimuratow, I.I., (2001): The Response of Polar Ionosphere to a Magnetic Storm Obtained from GPS Observations, SCAR Report, Publication of the Scientific Committee on Antarctic Research, Scott Polar Research Institute, Cambridge,UK
• Kryński, J., Zanimonskiy, Y., (2001): Contribution of Data from Polar Regions to the Investigation of Short Term Geodynamics. First Results and Perspectives, SCAR Report, Publication of the Scientific Committee on Antarctic Research, Scott Polar Research Institute, Cambridge,UK
• Manning, J., Cisak, J., (2002): Overview of the SCAR/WG-GGI/GIANT activities within the project on the Atmospheric Impact on GPS Observations in Antarctica and possible fields of cooperation with IGS/Iono WG. Proceedings of IGS/IAACs Ionosphere Workshop, Darmstadt, 17-18 January 2002
• Krankowski, A., Baran, L.W., Shagimuratow, I.I., Cisak, J., (2001): Influence of Ionosphere in Antarctic Regions on GPS Positioning Precision, Proceedings of IGS/IAACs Ionosphere Workshop, Darmstadt, 17-18 January 2002
• Ephishov I.I., Cisak J., Shagimuratov I.I, Wielgosz P. (2002): Phase fluctuations of GPS Signals at High attitude Ionosphere during the Storm, presented on 16th International Wroclaw Symposium “Electromagnetic Compatibility”, June 25 – 28, 2002
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
PAPERS PUBLISHED / PRESENTED (2)
• Cisak, J., (2002): Overview of the SCAR/WG-GGI/GIANT Activities as an Introduction to the Workshop, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Figurski, M, (2002): Atmospheric Impact on Precision of the Positioning in Regional GPS Network, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Krynski, J., (2002): Variations in GPS Solutions versus Atmospheric Delay, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Zanimonskiy, Y., Krynski, J., Cisak, J., (2002): Correlation of the Atmospheric and Geodetic time Series of GPS Results. Impact, coincidence or artifact? Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Krankowski, A., (2002): Modeling of the Ionosphere in Polar Regions, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Shagimuratov, I., (2002): Storm-time Ionospheric Effects Obtained from GPS TEC Measurements, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Wielgosz, P., (2002): Use of Deterministic Ionospheric Component in GPS Observations Processing, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
WORKING GROUP ON GEODESY & GEOGRAPHIC INFORMATIONShanghai, China, 14 – 17 July 2002
PAPERS PUBLISHED / PRESENTED (3)
• Zanimonskaya, A.Y., Prokopov, A.V., (2002): Some Effects of Ionosphere Model Thickness on GPS Results, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Vey, S., (2002): Tropospheric Research using GPS, Activities in Dresden, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Kruczyk, M., (2002): Tropospheric Delay in GPS Permanent Networks – a Tool for Atmosphere Research, Paper presented at the International workshop on "Atmospheric impact on GPS observations focused on polar regions", 15 May 2002, Warsaw, Poland
• Kryński, J., Zanimonskiy, Y., Wielgosz, P., (2002): Modelling biases in GPS Positioning Based on Short Observing Sessions, Presented at the XXVII General Assembly of European Geophysical Society 2002, Nice, France, 21-26 April 2002.
• Cisak, J., Kryński, J., Zanimonskiy, Y., (2002): GPS and internet in recent remote geophysical research in polar regions (in russian), Paper presented at the International Conference on Modern Progresses of Geodetic Sciences and Industry, 28-30 March, Lvov, Ukraine.
• Kryński, J., Cisak, J., Zanimonskaya, A., Prokopov, A., Zanimonskiy, Y., (2002): On some errors in zenith tropospheric delay determination from GPS data, Paper presented at the International Conference on Modern Progresses of Geodetic Sciences and Industry, 28-30 March, Lvov, Ukraine