CfA Interplanetary Shock Database - Individual Event Detail
 

Database: Ace Shock Analysis
Event ID: 19982380620
Observation time: 08/26/1998 238.26453 0620 [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 238.264525
Arrival time of shock [seconds of day] 22855.0 ± 16.0
Shock type FF
Electron data availability 0
X GSE location of spacecraft [Re] 0.039
Y GSE location of spacecraft [Re] 0.001
Z GSE location of spacecraft [Re] 0.004
Upstream plasma points selected for analysis 0008
Upstream field points selected for analysis 0036
Downstream plasma points selected for analysis 0011
Downstream field points selected for analysis 0050
Minimum chisq/dof for RH8,RH9,RH10 6.32, 11.47, 11.66
Event added to database
Sat Apr 30 21:43:01 2005
Event last processed
Wed Oct 15 14:34:45 2014
Method selected
RH08
Propagation delay to Earth [minutes]
0.006 ± 0.000

Asymptotic plasma parameters (About, Top)

Parameter
Upstream
Downstream
Vx GSE [km/s] -449.7 ± 2.7 -601.4 ± 12.1
Vy GSE [km/s] 23.6 ± 3.4 -23.6 ± 6.1
Vz GSE [km/s] -25.2 ± 3.3 -152.8 ± 20.9
Wi [km/s] 36.2 ± 1.8 76.5 ± 4.1
We [km/s] 1145.5 ± 57.9 2420.2 ± 128.7
Ni [n/cc] 4.9 ± 0.6 15.4 ± 1.0
Bx GSE [nT] -3.0 ± 0.6 -8.6 ± 5.4
By GSE [nT] -0.7 ± 0.9 9.2 ± 5.9
Bz GSE [nT] 4.3 ± 0.3 10.5 ± 6.4
Plasma Beta
0.469 ± 0.498
0.551 ± 0.533
Sound Speed [km/s]
46.69 ± 2.33
98.98 ± 5.53
Alfven Speed [km/s]
53.00 ± 2.63
105.30 ± 10.17

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

Method Nx Ny Nz Theta [degrees] Phi [degrees]
MC -0.954 ± 0.188 -0.066 ± 1.108 0.293 ± 0.285 17.06 ± 33.54 183.98 ± 66.57
VC -0.746 ± 0.065 -0.232 ± 0.033 -0.625 ± 0.527 -38.66 ± 6.16 197.29 ± 2.02
MX1 -0.815 ± 0.188 -0.273 ± 0.190 -0.511 ± 0.461 -30.75 ± 21.05 198.55 ± 12.66
MX2 -0.827 ± 0.065 -0.133 ± 0.101 -0.546 ± 0.484 -33.10 ± 6.72 189.11 ± 6.95
MX3 -0.811 ± 0.055 -0.118 ± 0.105 -0.574 ± 0.500 -35.00 ± 5.29 188.28 ± 7.42
RH08 -0.924 ± 0.007 -0.073 ± 0.018 -0.374 ± 0.356 -21.98 ± 1.06 184.51 ± 1.10
RH09 -0.995 ± 0.007 0.096 ± 0.067 -0.028 ± 0.028 -1.60 ± 3.92 174.48 ± 3.88
RH10 -0.993 ± 0.008 0.113 ± 0.067 -0.028 ± 0.028 -1.60 ± 3.94 173.48 ± 3.84
Average -0.883 -0.086 -0.299 -18.202 186.210
Median -0.827 -0.073 -0.374 -21.981 188.283
Deviation 0.095 0.138 0.336 20.314 9.220

Key shock parameters (About, Top)

Method ThetaBn Shock Speed Compression
MC 38.3 ± 2.6 578.5 ± 25.9 3.18 ± 0.62
VC 87.2 ± 1.7 645.4 ± 24.2 3.18 ± 0.62
MX1 85.0 ± 1.7 671.1 ± 23.3 3.18 ± 0.62
MX2 87.2 ± 1.9 679.9 ± 23.5 3.18 ± 0.62
MX3 89.1 ± 1.9 672.3 ± 23.7 3.18 ± 0.62
RH08 76.5 ± 2.2 707.8 ± 22.4 3.18 ± 0.62
RH09 57.9 ± 3.8 670.4 ± 22.0 3.18 ± 0.62
RH10 58.1 ± 3.9 668.3 ± 21.8 3.18 ± 0.62
Average 72.4 661.7 3.18
Median 85.0 671.1 3.18
Deviation 18.8 37.7 0.00

Upstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 158.6 ± 3.0 30.4 ± 1.2 41.6 ± 2.1 63.8 ± 2.5 5.22 ± 0.26 2.49 ± 0.11
VC 299.6 ± 2.9 1.7 ± 0.1 2.6 ± 0.1 70.6 ± 2.8 177.61 ± 7.49 4.25 ± 0.17
MX1 298.0 ± 2.9 3.0 ± 0.1 4.6 ± 0.2 70.6 ± 2.8 98.03 ± 4.16 4.23 ± 0.17
MX2 297.1 ± 2.8 1.7 ± 0.1 2.6 ± 0.1 70.6 ± 2.8 174.08 ± 7.45 4.21 ± 0.17
MX3 295.9 ± 2.8 0.5 ± 0.0 0.8 ± 0.0 70.7 ± 2.8 540.88 ± 23.14 4.19 ± 0.17
RH8 284.3 ± 2.7 8.3 ± 0.3 12.4 ± 0.6 70.2 ± 2.7 34.49 ± 1.50 4.06 ± 0.17
RH9 220.0 ± 2.5 19.3 ± 0.8 28.2 ± 1.4 68.0 ± 2.7 11.39 ± 0.53 3.24 ± 0.14
RH10 218.3 ± 2.5 19.2 ± 0.8 28.0 ± 1.4 68.0 ± 2.7 11.38 ± 0.53 3.22 ± 0.14
Average 259.0 10.5 15.1 69.1 131.6 3.7
Median 295.9 8.3 12.4 70.6 98.0 4.2
Deviation 53.3 11.1 15.5 2.4 180.0 0.7

Downstream wave speeds and mach numbers (About, Top)

Method
dV
Slow
Intermediate
Fast
Slow
Mach
Fast
Mach
MC 46.6 ± 17.1 62.4 ± 2.7 82.7 ± 8.0 130.7 ± 5.9 0.75 ± 0.29 0.36 ± 0.13
VC 97.6 ± 7.4 3.5 ± 0.1 5.1 ± 0.5 144.8 ± 6.4 28.24 ± 2.47 0.68 ± 0.06
MX1 97.5 ± 6.8 6.2 ± 0.3 9.2 ± 0.9 144.7 ± 6.4 15.66 ± 1.31 0.68 ± 0.06
MX2 97.2 ± 7.0 3.5 ± 0.1 5.1 ± 0.5 144.8 ± 6.4 27.79 ± 2.39 0.67 ± 0.06
MX3 95.7 ± 7.2 1.1 ± 0.0 1.6 ± 0.2 144.8 ± 6.4 85.41 ± 7.49 0.66 ± 0.06
RH8 93.6 ± 7.7 16.9 ± 0.7 24.7 ± 2.4 143.8 ± 6.3 5.55 ± 0.54 0.65 ± 0.06
RH9 69.6 ± 11.8 39.6 ± 1.7 56.0 ± 5.4 139.3 ± 6.2 1.76 ± 0.32 0.50 ± 0.09
RH10 69.0 ± 11.8 39.4 ± 1.7 55.7 ± 5.4 139.4 ± 6.2 1.76 ± 0.32 0.50 ± 0.09
Average 83.3 21.6 30.0 141.5 20.9 0.6
Median 95.7 16.9 24.7 144.7 15.7 0.7
Deviation 19.3 22.8 30.7 5.0 28.4 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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