3 rd magnete workshop on european geomagnetic repeat station survey
DESCRIPTION
3 rd MagNetE Workshop on European Geomagnetic Repeat Station Survey. REPEAT STATION MEASUREMENTS IN AUSTRIA 2005 AND 2006. Josef Berger, Gerald Duma, Barbara Leichter Central Institute for Meteorology and Geodynamics Vienna, Austria. The repeat station network in Austria. - PowerPoint PPT PresentationTRANSCRIPT
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Bucharest, 14-16 May 2007
Josef Berger, Gerald Duma, Barbara LeichterCentral Institute for Meteorology and Geodynamics
Vienna, Austria
REPEAT STATION MEASUREMENTS IN AUSTRIA
2005 AND 2006
3rd MagNetE Workshopon European Geomagnetic Repeat Station Survey
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Bucharest, 14-16 May 2007
The repeat station network in Austria
14 RS measured every year since 1999 Since 2001 marked with limestones
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Bucharest, 14-16 May 2007
Measurement-/Processing- Practice
Measurement sets 1995-2004: One set of 4-5 measurements 2005: One set in the evening and in the morning
Quality control Standard deviation SD of 4-5 results (1 set) Removal of data: dev >> SD (D – 30“, I – 20“,
H – 5nT)
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Bucharest, 14-16 May 2007
Standard deviation (in sec) – reduction THY
2003 2004 2005D_THY I_THY D_THY I_THY D_THY D_THY D_THY I_THY I_THY I_THY
e + m e m e + m e m 606 Aschau 3 3 5 1 5 4 4 3 1 1 95 Attersee 5 1 11 1 10 4 13 4 1 6 112 Ehrwald 18 1 2 1 5 5 4 4 199 Jedenspeigen 26 14 4 3 3 5 12 10 191 Klaffer 4 7 16 1 6 5 4 5 6 1 134 Krimml 4 1 12 3 6 3 4 11 0 2 604 Lampersberg 9 4 5 2 4 2 5 11 9 1 605 Mollitsch 8 6 7 2 16 17 9 8 9 3 322 Nenzinger Himmel 15 11 10 2 17 4 23 2 2 1 4 Rekawinkel 6 7 4 10 7 10 3 8 1 6 607 Saass 8 3 15 5 7 8 4 5 2 2151 Scheibbs 7 1 5 1 9 6 8 6 2 2 602 St. Johann a.Tauern 26 7 6 1 9 3 12 7 1 1 608 Trafelberg 4 1 10 3 2 3 1 1
Mean value SD 10,69 5,08 7,57 2,43 8,14 5,75 7,21 6,36 2,92 2,93
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Bucharest, 14-16 May 2007
Standard deviation (nT) – reduction THY
2003 2004 2005H_THY H_THY H_THY H_THY H_THY
e+m e m 606 Aschau 0,5 0,2 0,8 0,2 0,2 95 Attersee 0,3 0,1 0,9 0,1 1,2 112 Ehrwald 0,2 0,3 0,7 0,7 199 Jedenspeigen 2,4 0,7 2,7 3,1 191 Klaffer 1,4 0,2 1 1,3 0,1 134 Krimml 0,3 0,5 2,4 0,1 0,4 604 Lampersberg 0,9 0,3 3 1,9 0,2 605 Mollitsch 1,2 0,3 1,5 2 0,6 322 Nenzinger Himmel 2,3 0,4 1 0,5 0,1 4 Rekaw inkel 1,6 2,2 2 0,3 1,2 607 Saass 0,6 1 1,2 0,4 0,4151 Scheibbs 0,2 0,2 1,4 0,3 0,3 602 St. Johann a.Tauern 1,2 0,3 2,2 0,2 0,1 608 Trafelberg 0,3 0,4 0,3 0,2
Mean value 1,01 0,50 1,51 0,63 0,63
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Bucharest, 14-16 May 2007
Max. differences of e- and m- measurement sets
D: 30 sec I: 20 sec HZF: 5 nT
much bigger than scatter in single e- or m-set
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Bucharest, 14-16 May 2007
Reduction to different observatories
Differences in D (min): WIK-BDV 2004
17.0
17.0
17.0
17.0
10.0
10.0
10.0
10.010.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0
10.0 11.0 12 .0 13.0 14.0 15.0 16.0 17.0
46.0
47.0
48.0
49.0
46.0
47.0
48.0
49.049.0 49.0 49.0 49.0 49.0 49.0 49.0 49.0
46.0 46.0 46 .0 46.0 46.0 46.0 46.0 46.0
ADM O NT
A M ST ETTEN
BADEN
BA DG AST EIN
BAD ISC HL
B ISCHO FSHO FEN
B LUD ENZ
BREG EN Z
B RU CK/M UR
EISE NSTADT
E NNS
FREISTADT
G M UNDEN
GR AZ
HAIN BUR G
HO RN
IN NSBRU CK
JEN BACH
JUDENB URG
KINDBER GKITZBUE HEL
KLA GE NFU RT
K REM S
KRIM M L
KUFS TEIN
LA ND ECK
LIENZ
LILIEN FELD
LINZ
LO FER
M AR IAZE LL
M ATREI
M IST ELBACH
M URAU
NEUS IEDL
PINK AFELD
RAD K ERSB URG
RET Z
RE UTTE
RIED
S ALZBU RG
ST .P O ELTEN
ST .VE IT /G LAN
SC HA ERD IN G
S CH EIBBS
SCHLADM ING
SEM M ERING
S OE LDEN
SPITTA L/DR AU
S TEYR
TAM S W EG
VILLA CH
W E IZ
W E LS
W EYE R W R .N EUSTADT
W INDISCH G ARSTEN
W O LF SB ERG
ZE LL/SE E
ZW ETTL
FUERS TEN FE LD
W IEN
R eka
A tte
Ehrw
Krim
Sche
K laf
Jede
Nenz
S tJo
Lam p M oll
Asch
S tPe
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Bucharest, 14-16 May 2007
Reduction to different observatories
Differences in F-values: WIK-FUR 2004
17.0
17.0
17.0
17.0
10.0
10.0
10.0
10.010.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0
10.0 11.0 12.0 13.0 14.0 15.0 16.0 17.0
46.0
47.0
48.0
49.0
46.0
47.0
48.0
49.049.0 49.0 49.0 49.0 49.0 49.0 49.0 49.0
46.0 46.0 46.0 46.0 46.0 46.0 46.0 46.0
ADM O NT
AM STETTEN
BADE N
BADG ASTEIN
BAD ISCHL
BISC HO FSHO FEN
BLUDEN Z
BR EG ENZ
BRUCK/M UR
EISENSTAD T
EN NS
FREISTADT
GM UNDEN
GRAZ
HAINBURG
HO RN
INNSBRUCK
JENBACH
JUDENBUR G
KIND BER GKITZBU EH EL
KLAG EN FU RT
KREM S
KRIM ML
KUFSTEIN
LAND ECK
LIENZ
LILIENFELD
LINZ
LO FER
M ARIAZE LL
M ATREI
M ISTELBACH
M URAU
NEUSIEDL
PINKAFELD
RADKERSBURG
RETZ
REUTTE
RIED
SALZBURG
ST .PO ELTEN
ST .VEIT/G LAN
SC HAERD ING
SCHEIBBS
SC HLAD M ING
SEM M ERIN G
SO ELDEN
SPITTAL/DR AU
STEYR
TAM SW EG
VILLACH
W EIZ
W ELS
W EYER W R.N EU STADT
W IND IS CH G ARSTEN
W O LFSBERG
ZELL/SEE
ZW ETTL
FUERSTENFELD
W IEN
Reka
A tte
Ehrw
K rim
Sche
K la f
Jede
Nenz
S tJo
Lam p M oll
Asch
S tPe
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Bucharest, 14-16 May 2007
2005 - Reference Observatory THY
2005 Reduction epoch 2005. 5 –THY
preliminary Austrian data Usage of data upon request to ZAMG ST-No ST-NAME LAT LONG ELEV [m] D[min] I[deg] H Z F
606 Aschau 47,4208 16,2009 609 172,55 63,806 21173,9 43041,7 47968,6 95 Attersee 47,8983 13,5281 500 124,43 64,1646 20906,5 43178,2 47973,3 112 Ehrwald 47,4136 10,9205 1041 85,42 63,4765 21294,8 42665,6 47685,2 199 Jedenspeigen 48,4939 16,8586 182 170,37 64,6836 20722,7 43806,1 48460,7 191 Klaffer 48,7001 13,8571 646 126,42 64,7679 20557,0 43621,8 48222,9 134 Krimml 47,2354 12,2033 974 107,55 63,3539 21401,4 42650,7 47719,6 604 Lampersberg 46,8154 13,3962 990 119,58 63,0773 21600,8 42534,3 47705,0 605 Mollitsch 46,8407 15,4373 401 151,43 63,2179 21543,5 42680,8 47809,9 322 Nenzinger Himmel 47,0863 9,6425 1366 65,35 63,1136 21485,6 42374,4 47510,1 4 Rekawinkel 48,1842 16,0291 408 164,77 64,4105 20848,3 43533,7 48269,0 607 Saass 48,9730 15,0785 624 159,60 65,0629 20390,8 43853,5 48362,9 151 Scheibbs 48,0236 15,1731 522 149,07 64,2863 20893,4 43386,1 48155,2 602 St, Johann a,Tauern 47,3533 14,4814 1228 134,23 63,5859 21315,0 42911,4 47914,4 608 Trafelberg 47,9270 15,8628 1096 156,85 64,2089 20957,1 43368,6 48167,1 1 WIK 48,2656 16,3183 400 - - - - - 404 FUR 48,1656 11,2767 572 89,70 64,1967 20875,0 43190,0 47974,0 405 HRB 47,8747 18,1900 120 187,20 64,2367 20955,0 43482,0 48282,0 417 BDV 49,0676 14,0170 496 132,90 65,1383 20311,0 43866,0 48346,0 420 THY 46,9006 17,8933 187 180,30 63,4183 21445,0 42916,0 47989,0 421 NCK 47,6339 16,7167 160 - - - - -
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Bucharest, 14-16 May 2007
2006 - not reduced yet!
2006 Reduction epoch 2006.5 - WIK Date of
occupation ST-No ST-NAME LAT LONG ELEV [m] D[min]
606 Aschau 47,4208 16,2009 609 28.- 29.8.2006 95 Attersee 47,8983 13,5281 500 27.- 28.9.2006 112 Ehrwald 47,4136 10,9205 1041 03.- 04.10.2006 199 Jedenspeigen 48,4939 16,8586 182 07.- 08.9.2006 191 Klaffer 48,7001 13,8571 646 28.- 29.9.2006 134 Krimml 47,2354 12,2033 974 02.-0 3.10.2006 604 Lampersberg 46,8154 13,3962 990 31.8.- 1.9.2006 605 Mollitsch 46,8407 15,4373 401 18.- 19.9.2006 322 Nenzinger Himmel 47,0863 9,6425 1366 04.-05.10.2006
4 Rekawinkel 48,1842 16,0291 408 13.-14.9.2006 607 Saass 48,9730 15,0785 624 12.- 13.10.2006 151 Scheibbs 48,0236 15,1731 522 29.- 30.8.2006 602 St.Johann a\Tauern 47,3533 14,4814 1228 05.- 6.9.2006 608 Trafelberg 47,9270 15,8628 1096 12.-13.9.2006
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Bucharest, 14-16 May 2007
The average secular variation in Austria 2000 - 2004
Average of 5 observatories (without WIK) Average of 14 repeat stations
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Bucharest, 14-16 May 2007
The average secular variation in Austria 2000 - 2004
Average of 5 observatories Average of 14 repeat stations
2000.0 2001.0 2002.0 2003.0 2004.00
2
4
6
8
10
SV -
14 re
peat
sta
tions
(min
/yr)
0
2
4
6
8
10
SV -
5 ob
serv
ator
ies
(min
/yr)D
2000.0 2001.0 2002.0 2003.0 2004.0-20
-10
0
10
20
SV -
14 re
peat
sta
tions
(nT/
yr)
-20
-10
0
10
20
SV -
5 ob
serv
ator
ies
(nT/
yr)
H
2000.0 2001.0 2002.0 2003.0 2004.0
20
30
40
50
60
SV -
14 re
peat
sta
tions
(nT/
yr)
20
30
40
50
60
SV -
5 ob
serv
ator
ies
(nT/
yr)
Z
2000.0 2001.0 2002.0 2003.0 2004.020
30
40
50
60SV
- 14
repe
at s
tatio
ns (n
T/yr
)
20
30
40
50
60
SV -
5 ob
serv
ator
ies
(nT/
yr)
F
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Bucharest, 14-16 May 2007
Results Practice of evening and morning measurements SD of e-set and m-set measurements similar SD of e+m-measurements bigger (2x) SD depends on magnetic disturbances Reduction to different observatories Max. differences of station value: WIK-OBS D: 2 min I: 0.8 min H,Z,F: 10 nT (near SV)
compare Newitt,Barton, Bitterly (1996): D:1min, I:0.5min HZF: 5nT on average Differences change from year to year for same reference
observatory (more or less abitrary) On average: differences WIK-THY smaller Stay with the same reference observatory ( for “final RS data“)
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Bucharest, 14-16 May 2007
To quote Newitt, Barton, Bitterly (1996)
„A determination of the error in a repeat station observation is an important but often difficult
exercise“CH.6.3
We fully agree!
Thank you for your attention !