Database: Ace Shock Analysis
Event ID: 20011180431
Observation time: 04/28/2001 118.18888 0431 [UT]
|
|
General
Information (About, Top)
| Year |
2001 |
| Fractional day of year |
118.188877 |
| Arrival time of shock [seconds of day] |
16319.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
0.002 |
| Z GSE location of spacecraft [Re] |
-0.004 |
| Upstream plasma points selected for analysis |
0013 |
| Upstream field points selected for analysis |
0057 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0037 |
| Minimum chisq/dof for RH8,RH9,RH10 |
7.15, 31.15, 34.96 |
Event added to database
|
Sat Apr 30 21:51:10 2005
|
Event last processed
|
Tue May 3 13:58:29 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.004 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-457.0 ± 8.2 |
-745.0 ± 10.0 |
| Vy GSE [km/s] |
-36.7 ± 6.9 |
-104.9 ± 12.1 |
| Vz GSE [km/s] |
5.7 ± 7.7 |
27.6 ± 10.6 |
| Wi [km/s] |
27.9 ± 3.1 |
87.3 ± 6.1 |
| We [km/s] |
882.2 ± 97.6 |
2760.3 ± 193.0 |
| Ni [n/cc] |
3.5 ± 0.4 |
11.0 ± 2.5 |
| Bx GSE [nT] |
-1.2 ± 0.6 |
-4.8 ± 2.1 |
| By GSE [nT] |
7.2 ± 0.8 |
23.3 ± 1.9 |
| Bz GSE [nT] |
-2.9 ± 0.8 |
-0.5 ± 4.9 |
Plasma Beta
|
0.093 ± 0.093
|
0.296 ± 0.300
|
Sound Speed [km/s]
|
36.01 ± 3.98
|
112.69 ± 7.88
|
Alfven Speed [km/s]
|
92.67 ± 8.09
|
161.97 ± 13.06
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.653 ± 0.653 |
-0.467 ± 0.709 |
0.596 ± 0.513 |
36.59 ± 56.70 |
215.59 ± 54.42 |
| VC |
-0.970 ± 0.011 |
-0.230 ± 0.043 |
0.075 ± 0.074 |
4.27 ± 2.43 |
193.31 ± 2.53 |
| MX1 |
-0.970 ± 0.035 |
-0.231 ± 0.143 |
0.075 ± 0.075 |
4.29 ± 4.32 |
193.40 ± 8.45 |
| MX2 |
-0.973 ± 0.030 |
-0.225 ± 0.129 |
0.057 ± 0.057 |
3.29 ± 2.51 |
193.05 ± 7.60 |
| MX3 |
-0.973 ± 0.029 |
-0.224 ± 0.125 |
0.052 ± 0.052 |
2.96 ± 2.63 |
192.96 ± 7.34 |
| RH08 |
-0.986 ± 0.002 |
-0.148 ± 0.010 |
0.073 ± 0.072 |
4.16 ± 0.37 |
188.52 ± 0.58 |
| RH09 |
-0.994 ± 0.007 |
-0.078 ± 0.069 |
0.073 ± 0.072 |
4.16 ± 4.03 |
184.51 ± 3.95 |
| RH10 |
-0.997 ± 0.005 |
-0.026 ± 0.069 |
0.073 ± 0.072 |
4.16 ± 4.03 |
181.50 ± 3.95 |
| Average |
-0.940 |
-0.204 |
0.134 |
7.986 |
192.857 |
| Median |
-0.973 |
-0.224 |
0.073 |
4.165 |
193.048 |
| Deviation |
0.116 |
0.132 |
0.187 |
11.567 |
10.245 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
57.3 ± 4.6 |
675.4 ± 45.8 |
3.34 ± 0.66 |
| VC |
85.2 ± 4.1 |
903.1 ± 58.7 |
3.34 ± 0.66 |
| MX1 |
85.2 ± 4.1 |
902.9 ± 58.7 |
3.34 ± 0.66 |
| MX2 |
85.8 ± 4.1 |
903.5 ± 58.7 |
3.34 ± 0.66 |
| MX3 |
86.0 ± 4.1 |
903.7 ± 58.7 |
3.34 ± 0.66 |
| RH08 |
89.7 ± 4.1 |
906.4 ± 57.8 |
3.34 ± 0.66 |
| RH09 |
86.6 ± 4.1 |
905.2 ± 56.8 |
3.34 ± 0.66 |
| RH10 |
83.8 ± 4.1 |
900.8 ± 55.9 |
3.34 ± 0.66 |
| Average |
82.5 |
875.1 |
3.34 |
| Median |
85.8 |
903.5 |
3.34 |
| Deviation |
10.3 |
80.7 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
356.4 ± 5.5 |
18.4 ± 1.9 |
50.0 ± 4.4 |
97.8 ± 8.1 |
19.57 ± 2.10 |
3.67 ± 0.32 |
| VC |
450.7 ± 7.5 |
2.8 ± 0.3 |
7.7 ± 0.7 |
99.4 ± 8.1 |
163.92 ± 17.71 |
4.56 ± 0.40 |
| MX1 |
450.7 ± 7.5 |
2.8 ± 0.3 |
7.8 ± 0.7 |
99.4 ± 8.1 |
161.10 ± 17.40 |
4.56 ± 0.40 |
| MX2 |
450.4 ± 7.6 |
2.4 ± 0.2 |
6.7 ± 0.6 |
99.5 ± 8.1 |
187.36 ± 20.25 |
4.56 ± 0.40 |
| MX3 |
450.4 ± 7.6 |
2.3 ± 0.2 |
6.4 ± 0.6 |
99.5 ± 8.1 |
196.75 ± 21.26 |
4.56 ± 0.40 |
| RH8 |
449.7 ± 7.8 |
0.2 ± 0.0 |
0.4 ± 0.0 |
99.5 ± 8.1 |
2826.93 ± 306.67 |
4.55 ± 0.40 |
| RH9 |
447.5 ± 8.0 |
2.0 ± 0.2 |
5.6 ± 0.5 |
99.5 ± 8.1 |
225.09 ± 24.51 |
4.53 ± 0.40 |
| RH10 |
443.8 ± 8.2 |
3.6 ± 0.4 |
10.0 ± 0.9 |
99.4 ± 8.1 |
123.56 ± 13.50 |
4.49 ± 0.40 |
| Average |
437.5 |
4.3 |
11.8 |
99.2 |
488.0 |
4.4 |
| Median |
450.4 |
2.8 |
7.7 |
99.5 |
187.4 |
4.6 |
| Deviation |
32.8 |
5.8 |
15.7 |
0.6 |
947.1 |
0.3 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
123.4 ± 6.3 |
51.6 ± 2.9 |
87.4 ± 7.0 |
190.6 ± 12.0 |
2.40 ± 0.25 |
0.65 ± 0.07 |
| VC |
153.9 ± 10.2 |
7.7 ± 0.4 |
13.4 ± 1.1 |
197.4 ± 12.2 |
20.21 ± 2.16 |
0.78 ± 0.08 |
| MX1 |
153.9 ± 10.2 |
7.8 ± 0.4 |
13.7 ± 1.1 |
197.3 ± 12.2 |
19.85 ± 2.12 |
0.78 ± 0.08 |
| MX2 |
153.6 ± 10.3 |
6.7 ± 0.4 |
11.7 ± 0.9 |
197.4 ± 12.2 |
23.07 ± 2.48 |
0.78 ± 0.09 |
| MX3 |
153.7 ± 10.3 |
6.4 ± 0.4 |
11.2 ± 0.9 |
197.4 ± 12.2 |
24.24 ± 2.60 |
0.78 ± 0.09 |
| RH8 |
154.0 ± 10.0 |
0.4 ± 0.0 |
0.8 ± 0.1 |
197.5 ± 12.2 |
349.44 ± 36.81 |
0.78 ± 0.08 |
| RH9 |
154.2 ± 9.9 |
5.5 ± 0.3 |
9.7 ± 0.8 |
197.4 ± 12.2 |
27.99 ± 2.91 |
0.78 ± 0.08 |
| RH10 |
153.2 ± 9.8 |
10.0 ± 0.6 |
17.5 ± 1.4 |
197.2 ± 12.2 |
15.39 ± 1.59 |
0.78 ± 0.08 |
| Average |
150.0 |
12.0 |
20.7 |
196.5 |
60.3 |
0.8 |
| Median |
153.9 |
7.7 |
13.4 |
197.4 |
23.1 |
0.8 |
| Deviation |
10.7 |
16.2 |
27.4 |
2.4 |
117.1 |
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)
| 
