Database: Ace Shock Analysis
Event ID: 20020170544
Observation time: 01/17/2002 17.23905 0544 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
17.239051 |
| Arrival time of shock [seconds of day] |
20654.0 ± 65.0 |
| Shock type |
NN |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
-0.002 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0007 |
| Upstream field points selected for analysis |
0028 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0032 |
| Minimum chisq/dof for RH8,RH9,RH10 |
3.61, 14.34, 14.69 |
Event added to database
|
Sun May 1 21:47:03 2005
|
Event last processed
|
Tue May 3 14:14:39 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-364.6 ± 2.5 |
-391.1 ± 4.4 |
| Vy GSE [km/s] |
-9.2 ± 1.9 |
5.5 ± 2.0 |
| Vz GSE [km/s] |
2.9 ± 2.0 |
-1.8 ± 11.6 |
| Wi [km/s] |
28.0 ± 1.4 |
34.7 ± 2.4 |
| We [km/s] |
886.4 ± 45.1 |
1098.7 ± 75.2 |
| Ni [n/cc] |
4.5 ± 0.2 |
9.0 ± 1.2 |
| Bx GSE [nT] |
-0.9 ± 0.3 |
0.6 ± 1.0 |
| By GSE [nT] |
6.3 ± 0.3 |
6.8 ± 1.0 |
| Bz GSE [nT] |
1.6 ± 0.4 |
6.8 ± 1.1 |
Plasma Beta
|
0.171 ± 0.168
|
0.239 ± 0.251
|
Sound Speed [km/s]
|
36.19 ± 1.84
|
44.85 ± 3.07
|
Alfven Speed [km/s]
|
68.00 ± 2.11
|
71.82 ± 4.63
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.232 ± 0.133 |
0.971 ± 0.034 |
-0.059 ± 0.059 |
-3.36 ± 11.68 |
103.43 ± 7.87 |
| VC |
-0.863 ± 0.064 |
0.485 ± 0.089 |
-0.139 ± 0.138 |
-7.99 ± 19.74 |
150.66 ± 5.72 |
| MX1 |
-0.653 ± 0.424 |
0.748 ± 0.371 |
0.123 ± 0.122 |
7.05 ± 9.89 |
131.12 ± 32.50 |
| MX2 |
-0.770 ± 0.204 |
0.618 ± 0.254 |
0.157 ± 0.156 |
9.03 ± 9.98 |
141.24 ± 18.83 |
| MX3 |
-0.855 ± 0.089 |
0.491 ± 0.149 |
0.167 ± 0.165 |
9.59 ± 10.53 |
150.12 ± 9.94 |
| RH08 |
-0.971 ± 0.005 |
-0.008 ± 0.036 |
0.240 ± 0.235 |
13.90 ± 1.08 |
180.50 ± 2.14 |
| RH09 |
-0.945 ± 0.023 |
0.245 ± 0.069 |
0.218 ± 0.214 |
12.58 ± 3.96 |
165.46 ± 4.17 |
| RH10 |
-0.949 ± 0.022 |
0.228 ± 0.069 |
0.218 ± 0.214 |
12.58 ± 3.97 |
166.46 ± 4.16 |
| Average |
-0.780 |
0.472 |
0.116 |
6.675 |
148.625 |
| Median |
-0.855 |
0.491 |
0.167 |
9.589 |
150.661 |
| Deviation |
0.245 |
0.314 |
0.139 |
8.034 |
23.986 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
18.4 ± 3.6 |
120.7 ± 8.7 |
2.05 ± 0.32 |
| VC |
56.7 ± 2.1 |
375.6 ± 14.0 |
2.05 ± 0.32 |
| MX1 |
33.3 ± 2.3 |
288.5 ± 7.9 |
2.05 ± 0.32 |
| MX2 |
42.6 ± 2.7 |
334.3 ± 8.0 |
2.05 ± 0.32 |
| MX3 |
51.1 ± 2.8 |
366.3 ± 8.3 |
2.05 ± 0.32 |
| RH08 |
79.4 ± 3.4 |
404.9 ± 7.8 |
2.05 ± 0.32 |
| RH09 |
65.3 ± 3.2 |
398.1 ± 8.0 |
2.05 ± 0.32 |
| RH10 |
66.3 ± 3.2 |
399.5 ± 8.0 |
2.05 ± 0.32 |
| Average |
51.6 |
336.0 |
2.05 |
| Median |
56.7 |
375.6 |
2.05 |
| Deviation |
19.7 |
95.4 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
45.3 ± 2.2 |
33.7 ± 1.6 |
64.5 ± 2.0 |
69.3 ± 1.9 |
1.34 ± 0.07 |
0.65 ± 0.04 |
| VC |
65.7 ± 2.7 |
18.0 ± 0.7 |
37.4 ± 1.2 |
74.9 ± 1.5 |
3.65 ± 0.16 |
0.88 ± 0.03 |
| MX1 |
57.0 ± 2.8 |
28.7 ± 1.2 |
56.8 ± 1.8 |
71.5 ± 1.7 |
1.98 ± 0.09 |
0.80 ± 0.04 |
| MX2 |
58.7 ± 2.9 |
24.8 ± 1.0 |
50.1 ± 1.6 |
72.9 ± 1.6 |
2.37 ± 0.11 |
0.80 ± 0.04 |
| MX3 |
58.6 ± 2.9 |
20.8 ± 0.8 |
42.7 ± 1.3 |
74.2 ± 1.5 |
2.81 ± 0.13 |
0.79 ± 0.04 |
| RH8 |
50.2 ± 2.5 |
5.9 ± 0.2 |
12.5 ± 0.4 |
76.8 ± 1.4 |
8.56 ± 0.38 |
0.65 ± 0.03 |
| RH9 |
55.3 ± 2.8 |
13.5 ± 0.5 |
28.4 ± 0.9 |
75.9 ± 1.4 |
4.09 ± 0.18 |
0.73 ± 0.04 |
| RH10 |
55.1 ± 2.8 |
13.0 ± 0.5 |
27.4 ± 0.8 |
76.0 ± 1.4 |
4.23 ± 0.19 |
0.72 ± 0.03 |
| Average |
55.7 |
19.8 |
40.0 |
73.9 |
3.6 |
0.8 |
| Median |
57.0 |
20.8 |
42.7 |
74.9 |
3.6 |
0.8 |
| Deviation |
6.1 |
9.1 |
17.1 |
2.6 |
2.2 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
24.5 ± 2.5 |
41.3 ± 2.5 |
68.1 ± 4.4 |
74.0 ± 4.2 |
0.60 ± 0.08 |
0.33 ± 0.05 |
| VC |
35.0 ± 4.5 |
21.6 ± 1.0 |
39.5 ± 2.5 |
82.0 ± 3.5 |
1.63 ± 0.23 |
0.43 ± 0.07 |
| MX1 |
29.3 ± 2.8 |
34.8 ± 1.9 |
60.0 ± 3.9 |
77.3 ± 3.8 |
0.85 ± 0.11 |
0.38 ± 0.04 |
| MX2 |
29.9 ± 3.3 |
29.8 ± 1.5 |
52.9 ± 3.4 |
79.3 ± 3.6 |
1.01 ± 0.14 |
0.38 ± 0.04 |
| MX3 |
29.5 ± 3.7 |
24.9 ± 1.2 |
45.1 ± 2.9 |
81.0 ± 3.5 |
1.19 ± 0.18 |
0.36 ± 0.04 |
| RH8 |
25.7 ± 4.7 |
7.0 ± 0.3 |
13.2 ± 0.8 |
84.5 ± 3.4 |
3.69 ± 0.72 |
0.30 ± 0.05 |
| RH9 |
27.6 ± 4.3 |
16.1 ± 0.7 |
30.0 ± 1.9 |
83.2 ± 3.4 |
1.72 ± 0.30 |
0.33 ± 0.05 |
| RH10 |
27.5 ± 4.4 |
15.5 ± 0.7 |
28.9 ± 1.9 |
83.3 ± 3.4 |
1.78 ± 0.31 |
0.33 ± 0.05 |
| Average |
28.6 |
23.9 |
42.2 |
80.6 |
1.6 |
0.4 |
| Median |
29.3 |
24.9 |
45.1 |
82.0 |
1.6 |
0.4 |
| Deviation |
3.2 |
11.2 |
18.1 |
3.5 |
1.0 |
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)
| 
