A Velocity Field for Romania and Bulgaria

Cornelia Aichhorn, Sandro Krauss (1) Günter Stangl (2)

(1) Space Research Institute, Austrian Academy of Sciences

(2) Federal Office of Metrology and Surveying

2IWF/ÖAW GRAZ

Contents

Investigation Area

GPS Permanent Stations

2 Networks processed by the OLG

Velocity Estimation

Normal Equation Stacking of Weekly Solutions

Detection and Elimination of Offsets and Outliers

Processing of absolute and relative Velocities w.r.t the Eurasian Tectonic Plate

Velocity Comparison

OLG Velocities (2 Networks)

EPN Time Series Project

IERS Solutions

Velocity field for Romania and Bulgaria

Conclusions

3IWF/ÖAW GRAZ

Investigation Area# GPS Station City Country CEG MON EPN IERS CARP

1 AUT1 12619M002 Thessaloniki Greece

2 BACA 11405M001 Bacau Romania

3 BAIA 11406M001 Baia Mare Romania

4 BRAI 00000M001 Braila Romania

5 BUCU 11401M001 Bucuresti Romania

6 CLUJ 00000M001 Cluj Romania

7 COST 11407M001 Constanta Romania

8 CRAI 00000M001 Craiova Romania

9 DEVA 11408M001 Deva Romania

10 GRAZ 11001M002 Graz Austria

11 ISTA 20807M001 Istanbul Turkey

12 MATE 12734M008 Matera Italy

13 MIKL 12335M001 Mykolaiv, Ukraine

14 NYIR 11208M001 Nyirbator Hungary

15 ORAD 00000M001 Oradea Romania

16 ORID 15601M001 Ohrid Macedonia

17 OROS 11207M001 Oroshaza Hungary

18 ROZH 00000S001 Rozhen Bulgaria

19 SIBI 00000M001 Sibiu Romania

20 SOFI 11101M002 Sofia Bulgaria

21 SUCE 00000M001 Suceava Romania

22 TIMI 00000S001 Timisoara Romania

23 VARN 00000S001 Varna Bulgaria

24 ZECK 12351M001 Zelenchukskaya Russia

4IWF/ÖAW GRAZ

Investigation Area

Bulgaria and Romania with Surrounding Area

Results of 2 OLG networks combined

5IWF/ÖAW GRAZ

CERGOP – Network (CEG)

Legend

investigation area

compared with IERS and EPN estimated velocities

Investigation Area

6IWF/ÖAW GRAZ

Monitoring Oriental Network (MON)

Legend

investigation area

compared with IERS and EPN estimated velocities

Investigation Area

7IWF/ÖAW GRAZ

Velocity Estimation

Time series splitted at GPS week 1400 for better velocity estimation

OLG (data and analysis centre)

4 networks

weekly processing (BSW5.0)

EPN standards

NEQ-stacking of weekly solutions

Detection and Elimination of Offsets and Outliers

8IWF/ÖAW GRAZ

Velocity Estimation

Repeatability

Raw Time Series Cleaned Time Series

AUT1 12619M002

AUT1 12619M000

AUT1 12619M002

N [mm] 2.10 1.88 1.56

E [mm] 4.56 4.11 1.89

U [mm] 5.42 5.26 3.11

OLG (data and analysis centre)

4 networks

weekly processing (BSW5.0)

EPN standards

NEQ-stacking of weekly solutions

Detection and Elimination of Offsets and Outliers

9IWF/ÖAW GRAZ

Velocity Estimation

Jump in N, E and U at GPS week 1400 reduced

OLG (data and analysis centre)

4 networks

weekly processing (BSW5.0)

EPN standards

NEQ-stacking of weekly solutions

Detection and Elimination of Offsets and Outliers

Repeatability

Raw TS

Cleaned TS

N [mm] 1.49 1.11

E [mm] 1.88 1.43

U [mm] 4.68 3.76

10IWF/ÖAW GRAZ

Velocity Estimation

Outliers at GPS weeks 1459 and 1460 eliminated

Repeatability

Raw TS

Cleaned TS

N [mm] 1.19 1.23

E [mm] 1.32 1.33

U [mm] 9.13 7.93

OLG (data and analysis centre)

4 networks

weekly processing (BSW5.0)

EPN standards

NEQ-stacking of weekly solutions

Detection and Elimination of Offsets and Outliers

11IWF/ÖAW GRAZ

Velocity Estimation

# Station #WeeksRepeatability [mm]

N E U

1 AUT1 12619M002 61 1.56 1.89 3.11

2 BACA 11405M001 100 1.14 2.25 5.22

3 BAIA 11406M001 100 1.40 1.75 5.37

4 BRAI 00000M001 147 1.79 3.61 5.74

5 BUCU 11401M001 354 1.80 2.98 7.21

6 CLUJ 00000M001 140 2.79 2.82 4.45

7 COST 11407M001 132 2.33 3.95 6.18

8 CRAI 00000M001 109 1.74 2.50 6.62

9 DEVA 11408M001 100 1.61 1.75 4.30

10 ISTA 20807M001 357 1.95 3.96 5.22

11 MIKL 12335M001 258 1.82 4.52 7.16

12 NYIR 11208M001 227 2.49 1.95 5.02

13 ORAD 00000M001 113 2.11 2.35 4.55

14 ORID 15601M001 336 3.20 2.01 6.31

15 OROS 11207M001 301 1.48 1.87 4.50

16 ROZH 00000S001 53 1.81 1.71 3.88

17 SIBI 00000M001 139 1.84 2.54 4.77

18 SOFI 11101M002 338 2.76 2.46 5.09

19 SUCE 00000M001 148 1.51 3.59 6.29

20 TIMI 00000S001 11 0.68 0.84 2.65

21 VARN 00000S001 89 2.74 4.34 6.94

OLG data and analysis centre

4 networks

weekly processing (BSW5.0)

EPN standards

NEQ-stacking of weekly solutions

Detection and Elimination of Offsets and Outliers

Processing of absolute and relative velocities w.r.t the Eurasian Tectonic Plate

VX, VY, VZ

VN, VE, VU

Quality check

repeatabiliy of coordinates

„age“ of stations

12IWF/ÖAW GRAZ

Velocity Comparison

Velocity Differences w.r.t the IERS Solution and the EPN Time Series Project

Absolute Velocities

VX, VY, VZ

ITRF2005

CEG, MON and EPN velocities w.r.t. IERS solution

13IWF/ÖAW GRAZ

Velocity Field for Romania and Bulgaria

Lateral Velocities w.r.t the Eurasian Tectonic Plate

Problems

CLUJ sliding sloape

TIMI only 11 weeks

14IWF/ÖAW GRAZ

Velocity Field for Romania and Bulgaria

Lateral Velocities w.r.t the Eurasian Tectonic Plate

Interpretation

stable in the Carpathian Mountains

rotation in the South of the Carpathian Mountains

15IWF/ÖAW GRAZ

Conclusions

Velocity Estimation

Quality control is very important

A lot of effort had to be spent for data preprocessing

Comparison with official solutions

More stations are required

More offical solutions are preferable

Velocity field in Romania and Bulgaria

Rotation south of the carpathian mountains comes clear

Problem is the littlt number of stations in this area

Increase Densification

HEMUS Net (more stations in Bulgaria and Greece) already included in the OLG MON-Network

A Velocity Field for Romania and Bulgaria

THANK YOU!