Database: Ace Shock Analysis
Event ID: 19982180644
Observation time: 08/06/1998 218.28067 0644 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
218.280671 |
| Arrival time of shock [seconds of day] |
24250.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
0.004 |
| Z GSE location of spacecraft [Re] |
0.003 |
| Upstream plasma points selected for analysis |
0012 |
| Upstream field points selected for analysis |
0048 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0036 |
| Minimum chisq/dof for RH8,RH9,RH10 |
16.98, 33.31, 33.86 |
Event added to database
|
Sat Apr 30 21:42:51 2005
|
Event last processed
|
Wed Oct 15 14:31:23 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] |
-370.3 ± 2.6 |
-417.6 ± 2.4 |
| Vy GSE [km/s] |
-9.5 ± 1.6 |
-8.1 ± 1.4 |
| Vz GSE [km/s] |
-6.3 ± 3.2 |
9.2 ± 1.6 |
| Wi [km/s] |
14.9 ± 1.3 |
23.6 ± 1.1 |
| We [km/s] |
472.3 ± 40.3 |
746.9 ± 35.8 |
| Ni [n/cc] |
12.1 ± 1.0 |
27.6 ± 1.0 |
| Bx GSE [nT] |
-0.1 ± 0.2 |
0.5 ± 0.1 |
| By GSE [nT] |
8.9 ± 0.1 |
14.5 ± 0.5 |
| Bz GSE [nT] |
-6.5 ± 0.2 |
-12.1 ± 0.3 |
Plasma Beta
|
0.048 ± 0.046
|
0.093 ± 0.096
|
Sound Speed [km/s]
|
19.27 ± 1.66
|
30.50 ± 1.46
|
Alfven Speed [km/s]
|
68.79 ± 3.21
|
77.76 ± 1.77
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.696 ± 0.409 |
0.571 ± 0.484 |
0.434 ± 0.405 |
25.74 ± 22.61 |
140.63 ± 38.80 |
| VC |
-0.951 ± 0.020 |
0.029 ± 0.044 |
0.307 ± 0.297 |
17.90 ± 3.70 |
178.26 ± 2.64 |
| MX1 |
-0.956 ± 0.015 |
0.255 ± 0.050 |
0.143 ± 0.142 |
8.24 ± 3.01 |
165.09 ± 3.02 |
| MX2 |
-0.961 ± 0.015 |
0.244 ± 0.051 |
0.133 ± 0.132 |
7.65 ± 3.03 |
165.73 ± 3.06 |
| MX3 |
-0.966 ± 0.014 |
0.230 ± 0.054 |
0.119 ± 0.118 |
6.82 ± 3.12 |
166.63 ± 3.18 |
| RH08 |
-0.993 ± 0.001 |
0.114 ± 0.010 |
0.017 ± 0.017 |
0.96 ± 0.64 |
173.48 ± 0.58 |
| RH09 |
-0.986 ± 0.011 |
0.148 ± 0.067 |
0.073 ± 0.072 |
4.16 ± 3.91 |
171.48 ± 3.86 |
| RH10 |
-0.986 ± 0.011 |
0.148 ± 0.067 |
0.073 ± 0.072 |
4.16 ± 3.92 |
171.48 ± 3.87 |
| Average |
-0.937 |
0.217 |
0.162 |
9.454 |
166.598 |
| Median |
-0.961 |
0.230 |
0.133 |
7.652 |
171.476 |
| Deviation |
0.098 |
0.162 |
0.139 |
8.249 |
11.390 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
77.7 ± 0.7 |
322.2 ± 0.6 |
2.28 ± 0.21 |
| VC |
81.5 ± 1.2 |
439.1 ± 0.7 |
2.28 ± 0.21 |
| MX1 |
82.4 ± 1.2 |
435.9 ± 0.7 |
2.28 ± 0.21 |
| MX2 |
82.6 ± 1.2 |
437.6 ± 0.7 |
2.28 ± 0.21 |
| MX3 |
82.7 ± 1.3 |
439.9 ± 0.7 |
2.28 ± 0.21 |
| RH08 |
84.7 ± 1.4 |
451.2 ± 0.7 |
2.28 ± 0.21 |
| RH09 |
85.0 ± 1.3 |
448.7 ± 0.7 |
2.28 ± 0.21 |
| RH10 |
85.0 ± 1.3 |
448.7 ± 6.6 |
2.28 ± 0.21 |
| Average |
82.7 |
427.9 |
2.28 |
| Median |
82.7 |
439.9 |
2.28 |
| Deviation |
2.4 |
43.1 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
72.5 ± 2.6 |
4.0 ± 0.3 |
14.7 ± 0.7 |
71.4 ± 2.9 |
18.42 ± 1.44 |
1.02 ± 0.05 |
| VC |
89.1 ± 3.1 |
2.7 ± 0.2 |
10.1 ± 0.5 |
71.4 ± 2.9 |
32.82 ± 2.60 |
1.25 ± 0.06 |
| MX1 |
85.1 ± 2.6 |
2.4 ± 0.2 |
9.1 ± 0.4 |
71.4 ± 2.9 |
34.97 ± 2.67 |
1.19 ± 0.06 |
| MX2 |
85.2 ± 2.6 |
2.4 ± 0.2 |
8.9 ± 0.4 |
71.4 ± 2.9 |
35.60 ± 2.72 |
1.19 ± 0.06 |
| MX3 |
85.2 ± 2.6 |
2.3 ± 0.2 |
8.7 ± 0.4 |
71.4 ± 2.9 |
36.54 ± 2.79 |
1.19 ± 0.06 |
| RH8 |
84.5 ± 2.5 |
1.7 ± 0.1 |
6.4 ± 0.3 |
71.4 ± 2.9 |
49.28 ± 3.77 |
1.19 ± 0.06 |
| RH9 |
85.4 ± 2.6 |
1.6 ± 0.1 |
6.0 ± 0.3 |
71.4 ± 2.9 |
52.77 ± 4.04 |
1.20 ± 0.06 |
| RH10 |
85.4 ± 2.6 |
1.6 ± 0.1 |
6.0 ± 0.3 |
71.4 ± 2.9 |
52.77 ± 4.04 |
1.20 ± 0.06 |
| Average |
84.0 |
2.4 |
8.7 |
71.4 |
39.1 |
1.2 |
| Median |
85.2 |
2.4 |
8.9 |
71.4 |
36.5 |
1.2 |
| Deviation |
4.9 |
0.8 |
2.9 |
0.0 |
11.8 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
32.1 ± 1.9 |
6.1 ± 0.2 |
16.6 ± 0.4 |
83.3 ± 1.4 |
5.30 ± 0.36 |
0.39 ± 0.02 |
| VC |
39.4 ± 2.2 |
4.2 ± 0.2 |
11.4 ± 0.3 |
83.4 ± 1.4 |
9.43 ± 0.66 |
0.47 ± 0.03 |
| MX1 |
37.3 ± 2.3 |
3.7 ± 0.1 |
10.3 ± 0.2 |
83.5 ± 1.4 |
9.97 ± 0.71 |
0.45 ± 0.03 |
| MX2 |
37.3 ± 2.3 |
3.7 ± 0.1 |
10.1 ± 0.2 |
83.5 ± 1.4 |
10.15 ± 0.72 |
0.45 ± 0.03 |
| MX3 |
37.3 ± 2.3 |
3.6 ± 0.1 |
9.8 ± 0.2 |
83.5 ± 1.4 |
10.41 ± 0.75 |
0.45 ± 0.03 |
| RH8 |
37.1 ± 2.4 |
2.6 ± 0.1 |
7.2 ± 0.2 |
83.5 ± 1.4 |
14.08 ± 1.06 |
0.44 ± 0.03 |
| RH9 |
37.4 ± 2.4 |
2.5 ± 0.1 |
6.8 ± 0.2 |
83.5 ± 1.4 |
15.04 ± 1.11 |
0.45 ± 0.03 |
| RH10 |
37.4 ± 2.4 |
2.5 ± 0.1 |
6.8 ± 0.2 |
83.5 ± 1.4 |
15.04 ± 1.11 |
0.45 ± 0.03 |
| Average |
36.9 |
3.6 |
9.9 |
83.5 |
11.2 |
0.4 |
| Median |
37.3 |
3.7 |
10.1 |
83.5 |
10.4 |
0.4 |
| Deviation |
2.1 |
1.2 |
3.2 |
0.1 |
3.4 |
0.0 |
Survey interval (About, Top)
Selected
data (About, Top)
|
Key plasma parameters
|
Velocity
|
Magnetic Field
|
Simple
Methods
(About, Top)
Rankine Chi^2
Contour (About, Top)
Shock
Speed (About, Top)
Theta Bn (About, Top)
Mach Numbers (About, Top)
Page updated Mon Apr 13 08:55:21 2009
Michael L Stevens
(mstevens@cfa.harvard.edu)
| 
