Database: Ace Shock Analysis
Event ID: 20021090802
Observation time: 04/19/2002 109.33502 0802 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
109.335023 |
| Arrival time of shock [seconds of day] |
28946.0 ± 26.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
0.004 |
| Z GSE location of spacecraft [Re] |
-0.004 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0043 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0035 |
| Minimum chisq/dof for RH8,RH9,RH10 |
7.46, 16.52, 17.61 |
Event added to database
|
Sun May 1 22:10:19 2005
|
Event last processed
|
Tue May 3 14:20:21 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.005 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-426.6 ± 9.4 |
-609.5 ± 13.6 |
| Vy GSE [km/s] |
20.4 ± 3.9 |
-28.8 ± 11.3 |
| Vz GSE [km/s] |
-33.2 ± 6.5 |
-35.5 ± 9.6 |
| Wi [km/s] |
37.0 ± 1.7 |
75.7 ± 5.7 |
| We [km/s] |
1169.4 ± 54.3 |
2393.7 ± 180.4 |
| Ni [n/cc] |
1.1 ± 0.1 |
2.5 ± 0.1 |
| Bx GSE [nT] |
0.6 ± 0.7 |
3.7 ± 1.6 |
| By GSE [nT] |
-9.2 ± 0.3 |
-20.5 ± 0.9 |
| Bz GSE [nT] |
2.5 ± 0.6 |
4.3 ± 2.5 |
Plasma Beta
|
0.035 ± 0.033
|
0.066 ± 0.067
|
Sound Speed [km/s]
|
47.74 ± 2.22
|
97.72 ± 7.37
|
Alfven Speed [km/s]
|
197.97 ± 10.92
|
295.56 ± 4.93
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.945 ± 0.194 |
-0.267 ± 0.443 |
0.190 ± 0.188 |
10.97 ± 46.63 |
195.80 ± 26.72 |
| VC |
-0.965 ± 0.020 |
-0.263 ± 0.072 |
-0.011 ± 0.011 |
-0.61 ± 3.31 |
195.25 ± 4.25 |
| MX1 |
-0.967 ± 0.035 |
-0.254 ± 0.132 |
-0.017 ± 0.017 |
-0.95 ± 4.67 |
194.74 ± 7.83 |
| MX2 |
-0.967 ± 0.034 |
-0.254 ± 0.130 |
-0.007 ± 0.007 |
-0.38 ± 4.28 |
194.70 ± 7.73 |
| MX3 |
-0.967 ± 0.034 |
-0.253 ± 0.129 |
0.001 ± 0.001 |
0.03 ± 4.10 |
194.67 ± 7.67 |
| RH08 |
-0.983 ± 0.002 |
-0.183 ± 0.009 |
-0.006 ± 0.006 |
-0.32 ± 0.71 |
190.53 ± 0.54 |
| RH09 |
-0.983 ± 0.013 |
-0.183 ± 0.067 |
-0.017 ± 0.017 |
-0.96 ± 4.06 |
190.53 ± 3.91 |
| RH10 |
-0.983 ± 0.013 |
-0.183 ± 0.067 |
-0.017 ± 0.017 |
-0.96 ± 4.06 |
190.53 ± 3.91 |
| Average |
-0.970 |
-0.230 |
0.015 |
0.854 |
193.345 |
| Median |
-0.967 |
-0.253 |
-0.007 |
-0.375 |
194.703 |
| Deviation |
0.013 |
0.039 |
0.071 |
4.104 |
2.361 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
75.7 ± 3.7 |
724.0 ± 51.1 |
2.24 ± 0.22 |
| VC |
79.0 ± 4.3 |
746.4 ± 52.3 |
2.24 ± 0.22 |
| MX1 |
79.6 ± 4.3 |
748.0 ± 52.3 |
2.24 ± 0.22 |
| MX2 |
79.5 ± 4.3 |
747.7 ± 52.3 |
2.24 ± 0.22 |
| MX3 |
79.4 ± 4.3 |
747.5 ± 52.3 |
2.24 ± 0.22 |
| RH08 |
83.5 ± 4.2 |
756.8 ± 52.8 |
2.24 ± 0.22 |
| RH09 |
83.7 ± 4.3 |
757.1 ± 52.9 |
2.24 ± 0.22 |
| RH10 |
83.7 ± 4.3 |
757.1 ± 52.9 |
2.24 ± 0.22 |
| Average |
80.5 |
748.1 |
2.24 |
| Median |
79.6 |
748.0 |
2.24 |
| Deviation |
2.9 |
10.9 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
332.8 ± 9.6 |
11.5 ± 0.5 |
49.0 ± 2.7 |
203.4 ± 10.4 |
28.96 ± 1.41 |
1.64 ± 0.14 |
| VC |
339.8 ± 9.5 |
8.8 ± 0.4 |
37.6 ± 2.1 |
203.5 ± 10.4 |
38.55 ± 1.95 |
1.68 ± 0.14 |
| MX1 |
340.1 ± 9.5 |
8.4 ± 0.4 |
35.7 ± 2.0 |
203.5 ± 10.4 |
40.72 ± 2.06 |
1.68 ± 0.14 |
| MX2 |
340.1 ± 9.5 |
8.5 ± 0.4 |
36.1 ± 2.0 |
203.5 ± 10.4 |
40.27 ± 2.03 |
1.68 ± 0.14 |
| MX3 |
340.0 ± 9.5 |
8.5 ± 0.4 |
36.3 ± 2.0 |
203.5 ± 10.4 |
39.96 ± 2.01 |
1.68 ± 0.14 |
| RH8 |
340.9 ± 9.5 |
5.2 ± 0.2 |
22.4 ± 1.2 |
203.6 ± 10.4 |
65.09 ± 3.25 |
1.68 ± 0.14 |
| RH9 |
340.9 ± 9.5 |
5.1 ± 0.2 |
21.8 ± 1.2 |
203.6 ± 10.4 |
66.81 ± 3.35 |
1.68 ± 0.14 |
| RH10 |
340.9 ± 9.5 |
5.1 ± 0.2 |
21.8 ± 1.2 |
203.6 ± 10.4 |
66.81 ± 3.35 |
1.68 ± 0.14 |
| Average |
339.4 |
7.6 |
32.6 |
203.5 |
48.4 |
1.7 |
| Median |
340.1 |
8.5 |
36.1 |
203.5 |
40.7 |
1.7 |
| Deviation |
2.7 |
2.3 |
9.8 |
0.1 |
15.2 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
147.2 ± 9.9 |
23.0 ± 1.6 |
73.2 ± 1.2 |
310.5 ± 4.8 |
6.44 ± 0.84 |
0.47 ± 0.04 |
| VC |
150.4 ± 11.1 |
17.7 ± 1.2 |
56.2 ± 0.9 |
310.9 ± 4.8 |
8.58 ± 1.20 |
0.48 ± 0.04 |
| MX1 |
150.7 ± 11.3 |
16.7 ± 1.1 |
53.3 ± 0.9 |
310.9 ± 4.8 |
9.08 ± 1.28 |
0.49 ± 0.04 |
| MX2 |
150.6 ± 11.2 |
16.9 ± 1.1 |
53.8 ± 0.9 |
310.9 ± 4.8 |
8.98 ± 1.26 |
0.48 ± 0.04 |
| MX3 |
150.6 ± 11.2 |
17.0 ± 1.2 |
54.2 ± 0.9 |
310.9 ± 4.8 |
8.91 ± 1.25 |
0.48 ± 0.04 |
| RH8 |
152.1 ± 11.9 |
10.5 ± 0.7 |
33.4 ± 0.6 |
311.2 ± 4.8 |
14.62 ± 2.12 |
0.49 ± 0.04 |
| RH9 |
152.1 ± 12.0 |
10.2 ± 0.7 |
32.6 ± 0.5 |
311.2 ± 4.8 |
15.01 ± 2.18 |
0.49 ± 0.04 |
| RH10 |
152.1 ± 12.0 |
10.2 ± 0.7 |
32.6 ± 0.5 |
311.2 ± 4.8 |
15.01 ± 2.18 |
0.49 ± 0.04 |
| Average |
150.7 |
15.3 |
48.7 |
311.0 |
10.8 |
0.5 |
| Median |
150.7 |
16.9 |
53.8 |
310.9 |
9.1 |
0.5 |
| Deviation |
1.6 |
4.6 |
14.6 |
0.2 |
3.5 |
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)
| 
