Database: Ace Shock Analysis
Event ID: 20021381919
Observation time: 05/18/2002 138.80516 1919 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
138.805162 |
| Arrival time of shock [seconds of day] |
69566.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.037 |
| Y GSE location of spacecraft [Re] |
0.006 |
| Z GSE location of spacecraft [Re] |
-0.002 |
| Upstream plasma points selected for analysis |
0009 |
| Upstream field points selected for analysis |
0038 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0035 |
| Minimum chisq/dof for RH8,RH9,RH10 |
9.75, 27.54, 28.02 |
Event added to database
|
Sun May 1 22:16:58 2005
|
Event last processed
|
Tue May 3 14:23:40 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-346.6 ± 2.2 |
-475.6 ± 5.5 |
| Vy GSE [km/s] |
-22.8 ± 2.0 |
-70.7 ± 8.8 |
| Vz GSE [km/s] |
-33.1 ± 3.2 |
4.1 ± 5.4 |
| Wi [km/s] |
26.2 ± 2.9 |
48.7 ± 5.0 |
| We [km/s] |
828.2 ± 91.2 |
1540.7 ± 159.1 |
| Ni [n/cc] |
7.6 ± 0.7 |
20.1 ± 3.4 |
| Bx GSE [nT] |
1.0 ± 0.6 |
5.4 ± 3.9 |
| By GSE [nT] |
-3.5 ± 0.6 |
-12.8 ± 0.9 |
| Bz GSE [nT] |
-2.7 ± 0.7 |
-3.8 ± 3.6 |
Plasma Beta
|
0.537 ± 0.486
|
0.444 ± 0.430
|
Sound Speed [km/s]
|
33.81 ± 3.72
|
62.90 ± 6.50
|
Alfven Speed [km/s]
|
36.50 ± 2.98
|
74.53 ± 9.02
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.929 ± 0.297 |
-0.344 ± 0.723 |
-0.139 ± 0.139 |
-8.01 ± 56.70 |
200.31 ± 44.50 |
| VC |
-0.905 ± 0.025 |
-0.336 ± 0.061 |
0.261 ± 0.255 |
15.11 ± 2.50 |
200.37 ± 3.87 |
| MX1 |
-0.890 ± 0.124 |
-0.416 ± 0.256 |
0.189 ± 0.187 |
10.89 ± 11.07 |
205.07 ± 16.44 |
| MX2 |
-0.877 ± 0.111 |
-0.411 ± 0.232 |
0.249 ± 0.244 |
14.42 ± 5.75 |
205.10 ± 15.15 |
| MX3 |
-0.873 ± 0.109 |
-0.412 ± 0.226 |
0.262 ± 0.256 |
15.17 ± 5.00 |
205.25 ± 14.83 |
| RH08 |
-0.959 ± 0.003 |
-0.231 ± 0.013 |
0.162 ± 0.161 |
9.32 ± 0.49 |
193.54 ± 0.75 |
| RH09 |
-0.497 ± 0.060 |
-0.057 ± 0.070 |
-0.866 ± 0.524 |
-59.99 ± 3.96 |
186.52 ± 8.01 |
| RH10 |
-0.093 ± 0.061 |
0.117 ± 0.055 |
-0.989 ± 0.212 |
-81.43 ± 2.50 |
128.36 ± 26.67 |
| Average |
-0.753 |
-0.261 |
-0.109 |
-10.564 |
190.564 |
| Median |
-0.877 |
-0.336 |
0.189 |
10.886 |
200.368 |
| Deviation |
0.304 |
0.195 |
0.523 |
38.308 |
25.977 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
82.4 ± 9.5 |
541.0 ± 40.3 |
2.70 ± 0.48 |
| VC |
84.2 ± 10.8 |
540.4 ± 43.5 |
2.70 ± 0.48 |
| MX1 |
89.7 ± 10.7 |
537.4 ± 43.0 |
2.70 ± 0.48 |
| MX2 |
88.3 ± 10.9 |
532.1 ± 43.1 |
2.70 ± 0.48 |
| MX3 |
87.9 ± 10.9 |
530.2 ± 43.1 |
2.70 ± 0.48 |
| RH08 |
82.1 ± 10.3 |
556.4 ± 43.6 |
2.70 ± 0.48 |
| RH09 |
64.5 ± 6.8 |
257.5 ± 14.3 |
2.70 ± 0.48 |
| RH10 |
62.4 ± 8.6 |
11.6 ± 12.1 |
2.70 ± 0.48 |
| Average |
80.2 |
438.3 |
2.70 |
| Median |
84.2 |
537.4 |
2.70 |
| Deviation |
10.7 |
198.8 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
206.7 ± 2.1 |
3.2 ± 0.2 |
4.8 ± 0.4 |
49.8 ± 2.7 |
63.90 ± 3.94 |
4.16 ± 0.25 |
| VC |
227.7 ± 2.2 |
2.5 ± 0.1 |
3.7 ± 0.3 |
49.8 ± 2.7 |
91.48 ± 5.25 |
4.58 ± 0.25 |
| MX1 |
226.0 ± 2.2 |
0.1 ± 0.0 |
0.2 ± 0.0 |
49.9 ± 2.7 |
1627.59 ± 93.93 |
4.54 ± 0.25 |
| MX2 |
227.1 ± 2.2 |
0.7 ± 0.0 |
1.1 ± 0.1 |
49.9 ± 2.7 |
303.96 ± 17.37 |
4.56 ± 0.25 |
| MX3 |
227.0 ± 2.2 |
0.9 ± 0.1 |
1.3 ± 0.1 |
49.9 ± 2.7 |
254.92 ± 14.53 |
4.56 ± 0.25 |
| RH8 |
224.0 ± 2.2 |
3.4 ± 0.2 |
5.0 ± 0.4 |
49.8 ± 2.7 |
66.51 ± 3.92 |
4.51 ± 0.26 |
| RH9 |
55.3 ± 3.0 |
10.8 ± 0.6 |
15.7 ± 1.3 |
48.7 ± 2.7 |
5.13 ± 0.53 |
1.14 ± 0.11 |
| RH10 |
-50.6 ± 3.2 |
11.7 ± 0.7 |
16.9 ± 1.4 |
48.5 ± 2.6 |
-4.32 ± 0.19 |
-1.04 ± 0.05 |
| Average |
167.9 |
4.2 |
6.1 |
49.5 |
301.1 |
3.4 |
| Median |
226.0 |
3.2 |
4.8 |
49.8 |
91.5 |
4.5 |
| Deviation |
106.2 |
4.5 |
6.5 |
0.6 |
547.4 |
2.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
75.6 ± 4.4 |
6.3 ± 0.6 |
9.8 ± 1.2 |
97.5 ± 8.9 |
12.09 ± 1.33 |
0.78 ± 0.09 |
| VC |
85.2 ± 3.3 |
4.8 ± 0.4 |
7.6 ± 0.9 |
97.6 ± 8.9 |
17.70 ± 1.83 |
0.88 ± 0.09 |
| MX1 |
84.2 ± 3.3 |
0.3 ± 0.0 |
0.4 ± 0.1 |
97.7 ± 8.9 |
313.98 ± 32.64 |
0.87 ± 0.09 |
| MX2 |
85.0 ± 3.2 |
1.5 ± 0.1 |
2.3 ± 0.3 |
97.7 ± 8.9 |
58.86 ± 6.08 |
0.88 ± 0.09 |
| MX3 |
84.9 ± 3.1 |
1.7 ± 0.2 |
2.7 ± 0.3 |
97.7 ± 8.9 |
49.35 ± 5.10 |
0.88 ± 0.09 |
| RH8 |
83.1 ± 4.0 |
6.6 ± 0.6 |
10.2 ± 1.2 |
97.5 ± 8.9 |
12.77 ± 1.34 |
0.86 ± 0.09 |
| RH9 |
20.7 ± 5.9 |
21.0 ± 1.9 |
32.0 ± 3.9 |
95.4 ± 8.7 |
0.99 ± 0.29 |
0.22 ± 0.07 |
| RH10 |
-20.1 ± 5.3 |
22.7 ± 2.0 |
34.5 ± 4.2 |
95.0 ± 8.7 |
-0.89 ± 0.26 |
-0.21 ± 0.06 |
| Average |
62.3 |
8.1 |
12.4 |
97.0 |
58.1 |
0.6 |
| Median |
84.2 |
6.3 |
9.8 |
97.6 |
17.7 |
0.9 |
| Deviation |
39.9 |
8.8 |
13.4 |
1.1 |
105.6 |
0.4 |
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)
| 
