Database: Ace Shock Analysis
Event ID: 20021400257
Observation time: 05/20/2002 140.12294 0257 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
140.122940 |
| Arrival time of shock [seconds of day] |
10622.0 ± 26.0 |
| 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 |
0012 |
| Upstream field points selected for analysis |
0046 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0036 |
| Minimum chisq/dof for RH8,RH9,RH10 |
22.54, 28.75, 29.51 |
Event added to database
|
Sun May 1 22:18:09 2005
|
Event last processed
|
Tue May 3 14:24:28 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.006 ± 0.046
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-434.2 ± 4.0 |
-493.5 ± 7.7 |
| Vy GSE [km/s] |
22.0 ± 5.9 |
-15.5 ± 3.6 |
| Vz GSE [km/s] |
-23.0 ± 4.8 |
-29.6 ± 7.1 |
| Wi [km/s] |
23.7 ± 2.0 |
40.6 ± 6.5 |
| We [km/s] |
750.1 ± 62.5 |
1282.6 ± 207.0 |
| Ni [n/cc] |
4.9 ± 0.4 |
7.0 ± 0.8 |
| Bx GSE [nT] |
-4.9 ± 0.3 |
-6.0 ± 0.8 |
| By GSE [nT] |
5.2 ± 0.3 |
10.3 ± 0.8 |
| Bz GSE [nT] |
4.8 ± 0.3 |
7.3 ± 0.9 |
Plasma Beta
|
0.079 ± 0.079
|
0.124 ± 0.126
|
Sound Speed [km/s]
|
30.62 ± 2.55
|
52.36 ± 8.45
|
Alfven Speed [km/s]
|
84.55 ± 3.53
|
116.60 ± 6.72
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.877 ± 0.121 |
-0.326 ± 0.173 |
0.352 ± 0.337 |
20.63 ± 17.96 |
200.39 ± 11.02 |
| VC |
-0.840 ± 0.051 |
-0.533 ± 0.080 |
-0.097 ± 0.097 |
-5.57 ± 6.76 |
212.38 ± 5.43 |
| MX1 |
-0.959 ± 0.037 |
-0.260 ± 0.124 |
0.112 ± 0.111 |
6.42 ± 8.25 |
195.18 ± 7.38 |
| MX2 |
-0.963 ± 0.035 |
-0.254 ± 0.125 |
0.086 ± 0.086 |
4.96 ± 7.53 |
194.79 ± 7.45 |
| MX3 |
-0.968 ± 0.033 |
-0.246 ± 0.128 |
0.051 ± 0.051 |
2.90 ± 7.16 |
194.23 ± 7.60 |
| RH08 |
-0.995 ± 0.001 |
-0.096 ± 0.015 |
-0.006 ± 0.006 |
-0.32 ± 0.54 |
185.52 ± 0.84 |
| RH09 |
-0.998 ± 0.004 |
0.026 ± 0.068 |
0.050 ± 0.050 |
2.88 ± 4.06 |
178.50 ± 3.91 |
| RH10 |
-0.998 ± 0.005 |
0.044 ± 0.068 |
0.050 ± 0.050 |
2.88 ± 4.06 |
177.49 ± 3.91 |
| Average |
-0.950 |
-0.206 |
0.075 |
4.347 |
192.310 |
| Median |
-0.963 |
-0.246 |
0.051 |
2.903 |
194.790 |
| Deviation |
0.059 |
0.191 |
0.129 |
7.524 |
11.606 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
60.1 ± 2.7 |
563.4 ± 262.9 |
1.41 ± 0.11 |
| VC |
84.2 ± 2.6 |
591.5 ± 279.3 |
1.41 ± 0.11 |
| MX1 |
63.3 ± 2.6 |
624.9 ± 278.1 |
1.41 ± 0.11 |
| MX2 |
63.8 ± 2.5 |
628.9 ± 278.6 |
1.41 ± 0.11 |
| MX3 |
64.6 ± 2.5 |
633.8 ± 279.1 |
1.41 ± 0.11 |
| RH08 |
59.8 ± 2.3 |
640.6 ± 269.8 |
1.41 ± 0.11 |
| RH09 |
52.4 ± 2.3 |
626.6 ± 256.5 |
1.41 ± 0.11 |
| RH10 |
51.7 ± 2.3 |
624.5 ± 254.4 |
1.41 ± 0.11 |
| Average |
62.5 |
616.8 |
1.41 |
| Median |
63.3 |
626.6 |
1.41 |
| Deviation |
10.1 |
26.0 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
197.7 ± 5.4 |
14.5 ± 1.1 |
42.1 ± 1.8 |
88.8 ± 3.7 |
13.68 ± 0.88 |
2.23 ± 0.06 |
| VC |
236.0 ± 5.6 |
2.9 ± 0.2 |
8.5 ± 0.4 |
89.9 ± 3.7 |
81.83 ± 5.34 |
2.63 ± 0.07 |
| MX1 |
216.7 ± 4.9 |
13.1 ± 1.0 |
38.0 ± 1.6 |
89.0 ± 3.7 |
16.66 ± 1.12 |
2.44 ± 0.07 |
| MX2 |
218.3 ± 4.9 |
12.8 ± 1.0 |
37.3 ± 1.6 |
89.0 ± 3.7 |
17.10 ± 1.15 |
2.45 ± 0.07 |
| MX3 |
220.0 ± 4.8 |
12.5 ± 0.9 |
36.3 ± 1.5 |
89.1 ± 3.7 |
17.72 ± 1.20 |
2.47 ± 0.08 |
| RH8 |
210.4 ± 4.3 |
14.7 ± 1.1 |
42.6 ± 1.8 |
88.7 ± 3.7 |
14.41 ± 1.02 |
2.37 ± 0.08 |
| RH9 |
193.7 ± 3.9 |
17.9 ± 1.4 |
51.6 ± 2.2 |
88.1 ± 3.6 |
10.87 ± 0.79 |
2.20 ± 0.08 |
| RH10 |
191.5 ± 3.8 |
18.2 ± 1.4 |
52.4 ± 2.2 |
88.1 ± 3.6 |
10.56 ± 0.77 |
2.18 ± 0.08 |
| Average |
210.6 |
13.3 |
38.6 |
88.8 |
22.9 |
2.4 |
| Median |
216.7 |
14.5 |
42.1 |
89.0 |
16.7 |
2.4 |
| Deviation |
15.3 |
4.8 |
13.6 |
0.6 |
24.0 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
135.9 ± 7.7 |
24.1 ± 3.3 |
58.1 ± 3.3 |
125.7 ± 7.2 |
5.76 ± 1.01 |
1.09 ± 0.11 |
| VC |
165.6 ± 5.9 |
4.8 ± 0.6 |
11.7 ± 0.7 |
127.9 ± 7.5 |
35.24 ± 5.50 |
1.30 ± 0.11 |
| MX1 |
150.9 ± 7.4 |
21.7 ± 3.0 |
52.4 ± 3.0 |
126.2 ± 7.3 |
7.10 ± 1.21 |
1.20 ± 0.11 |
| MX2 |
152.2 ± 7.4 |
21.3 ± 2.9 |
51.4 ± 3.0 |
126.2 ± 7.3 |
7.30 ± 1.24 |
1.21 ± 0.11 |
| MX3 |
153.8 ± 7.4 |
20.7 ± 2.8 |
50.0 ± 2.9 |
126.3 ± 7.3 |
7.59 ± 1.29 |
1.22 ± 0.11 |
| RH8 |
147.8 ± 7.6 |
24.4 ± 3.4 |
58.7 ± 3.4 |
125.7 ± 7.2 |
6.19 ± 1.08 |
1.18 ± 0.11 |
| RH9 |
135.9 ± 7.8 |
29.8 ± 4.2 |
71.1 ± 4.1 |
124.5 ± 7.1 |
4.65 ± 0.84 |
1.10 ± 0.11 |
| RH10 |
134.3 ± 7.8 |
30.4 ± 4.3 |
72.3 ± 4.2 |
124.3 ± 7.1 |
4.52 ± 0.83 |
1.09 ± 0.11 |
| Average |
147.0 |
22.1 |
53.2 |
125.9 |
9.8 |
1.2 |
| Median |
150.9 |
24.1 |
58.1 |
126.2 |
7.1 |
1.2 |
| Deviation |
11.0 |
7.9 |
18.8 |
1.1 |
10.3 |
0.1 |
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)
| 
