Database: Ace Shock Analysis
Event ID: 20021412059
Observation time: 05/21/2002 141.87461 2059 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
141.874606 |
| Arrival time of shock [seconds of day] |
75566.0 ± 16.0 |
| 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 |
0007 |
| Upstream field points selected for analysis |
0028 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0031 |
| Minimum chisq/dof for RH8,RH9,RH10 |
3.39, 3.47, 3.55 |
Event added to database
|
Sun May 1 22:19:44 2005
|
Event last processed
|
Tue May 3 14:25:17 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.069
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-362.2 ± 1.3 |
-396.8 ± 1.2 |
| Vy GSE [km/s] |
2.6 ± 2.0 |
-16.6 ± 5.0 |
| Vz GSE [km/s] |
-42.3 ± 1.5 |
-28.9 ± 3.8 |
| Wi [km/s] |
16.0 ± 0.8 |
31.1 ± 0.8 |
| We [km/s] |
504.8 ± 25.0 |
984.9 ± 25.4 |
| Ni [n/cc] |
16.4 ± 0.8 |
18.3 ± 1.9 |
| Bx GSE [nT] |
-0.4 ± 0.3 |
-3.1 ± 0.6 |
| By GSE [nT] |
0.4 ± 0.6 |
4.8 ± 0.5 |
| Bz GSE [nT] |
3.6 ± 0.1 |
7.5 ± 1.9 |
Plasma Beta
|
0.638 ± 0.660
|
0.452 ± 0.441
|
Sound Speed [km/s]
|
20.61 ± 1.02
|
40.21 ± 1.04
|
Alfven Speed [km/s]
|
20.01 ± 0.19
|
49.06 ± 9.64
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.714 ± 0.767 |
-0.659 ± 0.827 |
0.236 ± 0.232 |
13.67 ± 52.40 |
222.70 ± 65.29 |
| VC |
-0.831 ± 0.060 |
-0.456 ± 0.101 |
0.319 ± 0.308 |
18.62 ± 5.24 |
208.74 ± 6.88 |
| MX1 |
-0.840 ± 0.063 |
-0.541 ± 0.097 |
-0.032 ± 0.032 |
-1.82 ± 20.31 |
212.78 ± 6.63 |
| MX2 |
-0.791 ± 0.054 |
-0.596 ± 0.069 |
0.142 ± 0.141 |
8.18 ± 8.90 |
217.00 ± 4.90 |
| MX3 |
-0.768 ± 0.056 |
-0.613 ± 0.068 |
0.186 ± 0.184 |
10.71 ± 7.73 |
218.62 ± 4.95 |
| RH08 |
-0.551 ± 0.011 |
0.380 ± 0.012 |
-0.743 ± 0.561 |
-47.99 ± 0.80 |
145.40 ± 1.04 |
| RH09 |
-0.551 ± 0.015 |
0.380 ± 0.017 |
-0.743 ± 0.561 |
-47.99 ± 1.01 |
145.40 ± 1.59 |
| RH10 |
-0.551 ± 0.020 |
0.380 ± 0.022 |
-0.743 ± 0.561 |
-47.99 ± 1.46 |
145.40 ± 1.96 |
| Average |
-0.700 |
-0.216 |
-0.172 |
-11.825 |
189.506 |
| Median |
-0.714 |
-0.456 |
0.142 |
8.181 |
212.782 |
| Deviation |
0.129 |
0.497 |
0.483 |
30.493 |
36.746 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
76.2 ± 9.4 |
517.0 ± 2687.5 |
1.09 ± 0.09 |
| VC |
69.0 ± 8.5 |
560.8 ± 2798.5 |
1.09 ± 0.09 |
| MX1 |
89.7 ± 8.5 |
562.3 ± 2533.2 |
1.09 ± 0.09 |
| MX2 |
80.6 ± 9.0 |
544.8 ± 2679.7 |
1.09 ± 0.09 |
| MX3 |
78.4 ± 9.1 |
538.0 ± 2697.6 |
1.09 ± 0.09 |
| RH08 |
52.3 ± 3.9 |
241.8 ± 126.5 |
1.09 ± 0.09 |
| RH09 |
52.3 ± 3.9 |
241.8 ± 126.5 |
1.09 ± 0.09 |
| RH10 |
52.3 ± 3.9 |
241.8 ± 126.5 |
1.09 ± 0.09 |
| Average |
68.9 |
431.0 |
1.09 |
| Median |
76.2 |
538.0 |
1.09 |
| Deviation |
14.8 |
157.3 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
270.0 ± 1.1 |
3.4 ± 0.1 |
4.8 ± 0.0 |
28.5 ± 0.7 |
78.44 ± 1.65 |
9.47 ± 0.21 |
| VC |
274.5 ± 0.9 |
5.2 ± 0.1 |
7.2 ± 0.1 |
28.3 ± 0.7 |
52.55 ± 1.15 |
9.72 ± 0.22 |
| MX1 |
258.0 ± 1.4 |
0.1 ± 0.0 |
0.1 ± 0.0 |
28.7 ± 0.7 |
3791.30 ± 79.39 |
8.98 ± 0.20 |
| MX2 |
266.0 ± 1.2 |
2.3 ± 0.1 |
3.3 ± 0.0 |
28.6 ± 0.7 |
113.55 ± 2.39 |
9.29 ± 0.21 |
| MX3 |
269.4 ± 1.2 |
2.9 ± 0.1 |
4.0 ± 0.0 |
28.6 ± 0.7 |
93.16 ± 1.97 |
9.43 ± 0.21 |
| RH8 |
9.8 ± 1.6 |
9.3 ± 0.2 |
12.2 ± 0.1 |
27.2 ± 0.7 |
1.06 ± 0.18 |
0.36 ± 0.06 |
| RH9 |
9.8 ± 1.6 |
9.3 ± 0.2 |
12.2 ± 0.1 |
27.2 ± 0.7 |
1.06 ± 0.18 |
0.36 ± 0.06 |
| RH10 |
9.8 ± 1.6 |
9.3 ± 0.2 |
12.2 ± 0.1 |
27.2 ± 0.7 |
1.06 ± 0.18 |
0.36 ± 0.06 |
| Average |
170.9 |
5.2 |
7.0 |
28.0 |
516.5 |
6.0 |
| Median |
266.0 |
5.2 |
7.2 |
28.5 |
78.4 |
9.3 |
| Deviation |
133.5 |
3.6 |
4.7 |
0.7 |
1324.0 |
4.7 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
229.5 ± 3.1 |
7.4 ± 0.6 |
11.7 ± 2.3 |
63.3 ± 7.2 |
31.35 ± 2.49 |
3.66 ± 0.40 |
| VC |
232.7 ± 2.4 |
11.2 ± 0.9 |
17.6 ± 3.5 |
62.7 ± 7.1 |
20.97 ± 1.72 |
3.75 ± 0.42 |
| MX1 |
218.9 ± 2.5 |
0.1 ± 0.0 |
0.2 ± 0.0 |
63.7 ± 7.2 |
1512.36 ± 117.64 |
3.47 ± 0.37 |
| MX2 |
225.3 ± 2.8 |
5.0 ± 0.4 |
8.0 ± 1.6 |
63.5 ± 7.2 |
45.22 ± 3.58 |
3.58 ± 0.39 |
| MX3 |
228.6 ± 2.9 |
6.2 ± 0.5 |
9.8 ± 1.9 |
63.4 ± 7.2 |
37.17 ± 2.95 |
3.64 ± 0.39 |
| RH8 |
8.0 ± 3.2 |
19.7 ± 1.5 |
30.0 ± 5.9 |
60.6 ± 7.1 |
0.41 ± 0.16 |
0.13 ± 0.06 |
| RH9 |
8.0 ± 3.2 |
19.7 ± 1.5 |
30.0 ± 5.9 |
60.6 ± 7.1 |
0.41 ± 0.16 |
0.13 ± 0.06 |
| RH10 |
8.0 ± 3.2 |
19.7 ± 1.5 |
30.0 ± 5.9 |
60.6 ± 7.1 |
0.41 ± 0.16 |
0.13 ± 0.06 |
| Average |
144.9 |
11.1 |
17.2 |
62.3 |
206.0 |
2.3 |
| Median |
225.3 |
11.2 |
17.6 |
63.3 |
31.4 |
3.6 |
| Deviation |
113.4 |
7.7 |
11.6 |
1.5 |
528.1 |
1.8 |
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)
| 
