CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19983552250
Observation time: 12/21/1998 355.95140 2250 [UT]

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Asymptotic parameters
Shock front normals
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Wave speed and Mach numbers
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Simple methods
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Individual equations
Shock speed
Theta Bn
Mach numbers


General Information (About, Top)

Year 1998
Fractional day of year 355.951400
Arrival time of shock [seconds of day] 82201.0 ± 24.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.035
Y GSE location of spacecraft [Re] 0.005
Z GSE location of spacecraft [Re] -0.002
Upstream plasma points selected for analysis 0007
Upstream field points selected for analysis 0037
Downstream plasma points selected for analysis 0008
Downstream field points selected for analysis 0043
Minimum chisq/dof for RH8,RH9,RH10 4.40, 5.07, 5.20
Event added to database
Sat Apr 30 21:43:32 2005
Event last processed
Wed Oct 15 14:46:08 2014
Method selected
RH08
Propagation delay to Earth [minutes]
0.009 ± 0.000

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -355.1 ± 2.1 -381.3 ± 1.3
Vy GSE [km/s] 13.2 ± 6.3 -2.5 ± 6.1
Vz GSE [km/s] 51.5 ± 4.1 10.7 ± 5.0
Wi [km/s] 42.8 ± 1.1 51.4 ± 0.6
We [km/s] 1352.8 ± 34.7 1626.9 ± 19.2
Ni [n/cc] 12.7 ± 0.8 20.0 ± 1.1
Bx GSE [nT] -8.2 ± 0.4 -10.7 ± 0.6
By GSE [nT] 0.3 ± 1.7 1.9 ± 1.2
Bz GSE [nT] -2.1 ± 1.5 5.4 ± 0.8
Plasma Beta
0.660 ± 0.686
0.755 ± 0.747
Sound Speed [km/s]
55.34 ± 1.40
66.47 ± 0.73
Alfven Speed [km/s]
52.98 ± 3.03
59.42 ± 2.83

Best values of shock front normal for each method (About, Top)

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.957 ± 0.027 0.026 ± 0.159 -0.290 ± 0.282 -16.85 ± 5.31 178.46 ± 9.55
VC -0.531 ± 0.112 -0.307 ± 0.132 -0.790 ± 0.558 -52.20 ± 7.29 210.02 ± 13.19
MX1 -0.956 ± 0.024 -0.013 ± 0.126 -0.292 ± 0.284 -16.99 ± 4.61 180.75 ± 7.56
MX2 -0.951 ± 0.027 -0.133 ± 0.107 -0.279 ± 0.272 -16.22 ± 4.56 187.99 ± 6.43
MX3 -0.933 ± 0.042 -0.248 ± 0.131 -0.262 ± 0.256 -15.18 ± 5.41 194.90 ± 8.02
RH08 -0.994 ± 0.002 -0.061 ± 0.019 -0.095 ± 0.095 -5.45 ± 1.03 183.51 ± 1.08
RH09 -0.995 ± 0.007 -0.061 ± 0.068 -0.084 ± 0.084 -4.81 ± 3.56 183.51 ± 3.94
RH10 -0.995 ± 0.007 -0.061 ± 0.069 -0.084 ± 0.084 -4.81 ± 3.69 183.51 ± 3.98
Average -0.914 -0.107 -0.272 -16.564 187.829
Median -0.956 -0.061 -0.262 -15.181 183.510
Deviation 0.157 0.115 0.230 15.455 10.255

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 10.1 ± 7.1 425.1 ± 2.1 1.57 ± 0.14
VC 44.8 ± 11.0 286.9 ± 3.3 1.57 ± 0.14
MX1 10.0 ± 7.5 426.8 ± 2.1 1.57 ± 0.14
MX2 12.4 ± 8.6 427.9 ± 2.2 1.57 ± 0.14
MX3 17.1 ± 10.0 422.0 ± 2.4 1.57 ± 0.14
RH08 15.2 ± 5.3 430.8 ± 1.7 1.57 ± 0.14
RH09 15.6 ± 5.2 430.7 ± 1.7 1.57 ± 0.14
RH10 15.6 ± 5.2 430.7 ± 12.7 1.57 ± 0.14
Average 17.6 410.1 1.57
Median 15.6 427.9 1.57
Deviation 11.3 49.9 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 99.7 ± 2.1 48.8 ± 1.5 52.2 ± 3.0 59.1 ± 1.9 2.04 ± 0.07 1.69 ± 0.06
VC 142.8 ± 3.7 29.3 ± 0.9 37.6 ± 2.1 70.8 ± 2.2 4.87 ± 0.25 2.02 ± 0.10
MX1 102.1 ± 2.1 48.9 ± 1.5 52.2 ± 3.0 59.0 ± 1.9 2.09 ± 0.08 1.73 ± 0.06
MX2 106.1 ± 2.0 47.7 ± 1.4 51.7 ± 3.0 60.0 ± 1.9 2.23 ± 0.09 1.77 ± 0.07
MX3 107.2 ± 2.3 45.3 ± 1.4 50.6 ± 2.9 61.8 ± 1.9 2.37 ± 0.10 1.74 ± 0.07
RH8 83.3 ± 2.0 46.3 ± 1.4 51.1 ± 2.9 61.1 ± 1.9 1.80 ± 0.06 1.36 ± 0.05
RH9 82.3 ± 2.0 46.0 ± 1.4 51.0 ± 2.9 61.3 ± 1.9 1.79 ± 0.06 1.34 ± 0.05
RH10 82.3 ± 2.0 46.0 ± 1.4 51.0 ± 2.9 61.3 ± 1.9 1.79 ± 0.06 1.34 ± 0.05
Average 100.7 44.8 49.7 61.8 2.4 1.6
Median 102.1 46.3 51.1 61.3 2.1 1.7
Deviation 20.1 6.4 4.9 3.8 1.0 0.2

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 63.5 ± 2.0 56.1 ± 2.2 58.5 ± 2.8 69.3 ± 1.0 1.13 ± 0.04 0.92 ± 0.02
VC 92.1 ± 2.9 34.0 ± 1.0 42.1 ± 2.0 82.5 ± 1.8 2.71 ± 0.10 1.12 ± 0.03
MX1 65.2 ± 1.8 56.1 ± 2.2 58.5 ± 2.8 69.3 ± 1.0 1.16 ± 0.04 0.94 ± 0.02
MX2 67.9 ± 1.6 54.8 ± 2.1 58.0 ± 2.8 70.3 ± 1.1 1.24 ± 0.04 0.97 ± 0.02
MX3 68.4 ± 1.6 52.2 ± 1.8 56.8 ± 2.7 72.3 ± 1.3 1.31 ± 0.04 0.95 ± 0.02
RH8 52.7 ± 1.3 53.3 ± 1.9 57.3 ± 2.7 71.5 ± 1.2 0.99 ± 0.03 0.74 ± 0.01
RH9 52.1 ± 1.3 53.0 ± 1.9 57.2 ± 2.7 71.7 ± 1.2 0.98 ± 0.03 0.73 ± 0.01
RH10 52.1 ± 1.3 53.0 ± 1.9 57.2 ± 2.7 71.7 ± 1.2 0.98 ± 0.03 0.73 ± 0.01
Average 64.3 51.6 55.7 72.3 1.3 0.9
Median 65.2 53.3 57.3 71.7 1.2 0.9
Deviation 13.3 7.3 5.5 4.2 0.6 0.1

Survey interval (About, Top)
Survey of solar wind interval
Selected data (About, Top)
Key plasma parameters
Survey
Velocity
V

Magnetic Field
B


Simple Methods (About, Top)
Simple methods
Rankine Chi^2 Contour (About, Top)

Chisq


Shock Speed (About, Top)
Shock Speed

Theta Bn (About, Top)
Theta Bn

Mach Numbers (About, Top)

Upstream wave speeds
Upstream Mach numbers
Downsteam wave speeds
Downstream mach numbers
Page updated Mon Apr 13 08:55:21 2009
Michael L Stevens (mstevens@cfa.harvard.edu)

   
 

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