Database: Ace Shock Analysis
Event ID: 20021981526
Observation time: 07/17/2002 198.64322 1526 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
198.643218 |
| Arrival time of shock [seconds of day] |
55574.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.039 |
| Y GSE location of spacecraft [Re] |
-0.003 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0012 |
| Upstream field points selected for analysis |
0046 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0039 |
| Minimum chisq/dof for RH8,RH9,RH10 |
5.56, 8.09, 8.24 |
Event added to database
|
Sun May 1 22:27:13 2005
|
Event last processed
|
Tue May 3 14:27:42 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.002
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-410.2 ± 6.4 |
-491.0 ± 17.2 |
| Vy GSE [km/s] |
41.5 ± 13.9 |
-74.7 ± 12.1 |
| Vz GSE [km/s] |
7.9 ± 13.0 |
-55.8 ± 19.9 |
| Wi [km/s] |
42.7 ± 2.1 |
63.8 ± 7.9 |
| We [km/s] |
1350.3 ± 64.8 |
2018.0 ± 250.8 |
| Ni [n/cc] |
7.0 ± 1.2 |
18.8 ± 3.0 |
| Bx GSE [nT] |
-5.2 ± 1.7 |
-8.3 ± 2.5 |
| By GSE [nT] |
-1.9 ± 2.1 |
11.7 ± 2.4 |
| Bz GSE [nT] |
-1.9 ± 2.0 |
-2.1 ± 4.7 |
Plasma Beta
|
0.617 ± 0.645
|
0.723 ± 0.698
|
Sound Speed [km/s]
|
55.13 ± 2.65
|
82.38 ± 10.24
|
Alfven Speed [km/s]
|
55.54 ± 7.02
|
78.11 ± 8.73
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.925 ± 0.116 |
-0.201 ± 0.206 |
-0.321 ± 0.310 |
-18.75 ± 19.50 |
192.27 ± 12.70 |
| VC |
-0.525 ± 0.115 |
-0.752 ± 0.089 |
-0.398 ± 0.376 |
-23.47 ± 7.61 |
235.07 ± 8.46 |
| MX1 |
-0.941 ± 0.167 |
-0.191 ± 0.367 |
-0.278 ± 0.270 |
-16.12 ± 31.58 |
191.50 ± 22.24 |
| MX2 |
-0.854 ± 0.115 |
-0.282 ± 0.175 |
-0.437 ± 0.407 |
-25.89 ± 13.87 |
198.29 ± 11.54 |
| MX3 |
-0.834 ± 0.137 |
-0.305 ± 0.175 |
-0.460 ± 0.425 |
-27.41 ± 16.23 |
200.08 ± 11.64 |
| RH08 |
-0.774 ± 0.012 |
-0.130 ± 0.010 |
0.620 ± 0.525 |
38.32 ± 1.13 |
189.53 ± 0.71 |
| RH09 |
-0.989 ± 0.011 |
0.009 ± 0.066 |
0.151 ± 0.150 |
8.68 ± 4.08 |
179.50 ± 3.83 |
| RH10 |
-0.993 ± 0.008 |
0.009 ± 0.068 |
0.117 ± 0.117 |
6.74 ± 4.05 |
179.50 ± 3.91 |
| Average |
-0.854 |
-0.231 |
-0.126 |
-7.238 |
195.717 |
| Median |
-0.854 |
-0.191 |
-0.278 |
-16.118 |
192.274 |
| Deviation |
0.154 |
0.241 |
0.385 |
23.159 |
17.600 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
28.5 ± 6.4 |
553.4 ± 47.0 |
2.71 ± 0.51 |
| VC |
36.4 ± 22.0 |
434.2 ± 47.9 |
2.71 ± 0.51 |
| MX1 |
28.7 ± 7.8 |
557.3 ± 45.7 |
2.71 ± 0.51 |
| MX2 |
27.9 ± 6.4 |
538.9 ± 50.3 |
2.71 ± 0.51 |
| MX3 |
27.8 ± 7.7 |
534.0 ± 51.0 |
2.71 ± 0.51 |
| RH08 |
62.0 ± 20.6 |
379.2 ± 15.6 |
2.71 ± 0.51 |
| RH09 |
40.1 ± 22.1 |
517.5 ± 30.4 |
2.71 ± 0.51 |
| RH10 |
38.7 ± 22.1 |
523.0 ± 31.5 |
2.71 ± 0.51 |
| Average |
36.2 |
504.7 |
2.71 |
| Median |
36.4 |
534.0 |
2.71 |
| Deviation |
11.6 |
63.7 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
184.7 ± 6.0 |
39.6 ± 2.7 |
48.8 ± 6.2 |
67.7 ± 4.8 |
4.69 ± 0.42 |
2.75 ± 0.24 |
| VC |
253.1 ± 10.4 |
35.0 ± 2.4 |
44.7 ± 5.7 |
70.2 ± 5.0 |
7.27 ± 0.70 |
3.63 ± 0.36 |
| MX1 |
181.2 ± 5.8 |
39.5 ± 2.7 |
48.7 ± 6.2 |
67.7 ± 4.8 |
4.61 ± 0.40 |
2.69 ± 0.23 |
| MX2 |
203.7 ± 7.0 |
40.0 ± 2.7 |
49.1 ± 6.2 |
67.4 ± 4.8 |
5.13 ± 0.48 |
3.04 ± 0.29 |
| MX3 |
208.3 ± 7.2 |
40.0 ± 2.7 |
49.1 ± 6.2 |
67.4 ± 4.8 |
5.24 ± 0.49 |
3.11 ± 0.30 |
| RH8 |
62.3 ± 9.1 |
18.8 ± 1.3 |
26.1 ± 3.3 |
76.1 ± 5.3 |
3.30 ± 0.36 |
0.82 ± 0.09 |
| RH9 |
110.5 ± 6.8 |
32.8 ± 2.3 |
42.5 ± 5.4 |
71.2 ± 5.0 |
3.38 ± 0.25 |
1.56 ± 0.11 |
| RH10 |
114.3 ± 6.7 |
33.6 ± 2.3 |
43.3 ± 5.5 |
70.9 ± 5.0 |
3.42 ± 0.26 |
1.62 ± 0.12 |
| Average |
164.8 |
34.9 |
44.1 |
69.8 |
4.6 |
2.4 |
| Median |
184.7 |
39.5 |
48.7 |
70.2 |
4.7 |
2.7 |
| Deviation |
63.1 |
7.2 |
7.8 |
3.0 |
1.3 |
1.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
66.1 ± 20.1 |
56.5 ± 3.0 |
68.7 ± 7.7 |
99.1 ± 5.2 |
1.18 ± 0.38 |
0.67 ± 0.22 |
| VC |
97.8 ± 15.6 |
50.0 ± 2.6 |
62.9 ± 7.0 |
102.6 ± 5.2 |
1.97 ± 0.37 |
0.96 ± 0.18 |
| MX1 |
65.2 ± 19.6 |
56.3 ± 3.0 |
68.5 ± 7.7 |
99.2 ± 5.2 |
1.17 ± 0.38 |
0.66 ± 0.21 |
| MX2 |
74.0 ± 20.7 |
57.0 ± 3.1 |
69.1 ± 7.7 |
98.8 ± 5.2 |
1.31 ± 0.40 |
0.75 ± 0.23 |
| MX3 |
76.1 ± 20.8 |
57.0 ± 3.1 |
69.1 ± 7.7 |
98.8 ± 5.2 |
1.34 ± 0.40 |
0.78 ± 0.23 |
| RH8 |
24.1 ± 9.6 |
27.0 ± 1.3 |
36.7 ± 4.1 |
110.9 ± 5.4 |
0.89 ± 0.33 |
0.22 ± 0.08 |
| RH9 |
41.2 ± 15.2 |
46.8 ± 2.4 |
59.8 ± 6.7 |
104.0 ± 5.2 |
0.88 ± 0.33 |
0.40 ± 0.15 |
| RH10 |
42.6 ± 15.6 |
48.0 ± 2.5 |
60.9 ± 6.8 |
103.5 ± 5.2 |
0.89 ± 0.33 |
0.41 ± 0.15 |
| Average |
60.9 |
49.8 |
62.0 |
102.1 |
1.2 |
0.6 |
| Median |
66.1 |
56.3 |
68.5 |
102.6 |
1.2 |
0.7 |
| Deviation |
23.6 |
10.2 |
10.9 |
4.2 |
0.4 |
0.2 |
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)
| 
