Database: Ace Shock Analysis
Event ID: 20020480209
Observation time: 02/17/2002 48.08993 0209 [UT]
|
|
General
Information (About, Top)
| Year |
2002 |
| Fractional day of year |
48.089931 |
| Arrival time of shock [seconds of day] |
7770.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.036 |
| 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 |
0006
|
| Downstream field points selected for analysis |
0026 |
| Minimum chisq/dof for RH8,RH9,RH10 |
9.31, 10.89, 11.57 |
Event added to database
|
Sun May 1 21:54:56 2005
|
Event last processed
|
Tue May 3 14:15:28 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.006 ± 0.003
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-363.5 ± 0.8 |
-391.3 ± 3.8 |
| Vy GSE [km/s] |
5.2 ± 1.4 |
-15.7 ± 3.9 |
| Vz GSE [km/s] |
2.2 ± 1.2 |
36.0 ± 1.3 |
| Wi [km/s] |
22.6 ± 0.8 |
29.2 ± 2.8 |
| We [km/s] |
713.3 ± 25.0 |
922.0 ± 88.8 |
| Ni [n/cc] |
10.2 ± 0.4 |
37.1 ± 2.7 |
| Bx GSE [nT] |
4.7 ± 0.1 |
6.7 ± 0.6 |
| By GSE [nT] |
-0.7 ± 0.1 |
-5.4 ± 0.9 |
| Bz GSE [nT] |
-0.0 ± 0.1 |
-1.2 ± 1.1 |
Plasma Beta
|
0.495 ± 0.488
|
0.880 ± 0.976
|
Sound Speed [km/s]
|
29.12 ± 1.02
|
37.64 ± 3.63
|
Alfven Speed [km/s]
|
32.08 ± 0.45
|
31.54 ± 2.19
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.924 ± 0.068 |
-0.375 ± 0.166 |
-0.079 ± 0.079 |
-4.54 ± 5.83 |
202.07 ± 10.27 |
| VC |
-0.575 ± 0.064 |
-0.433 ± 0.082 |
0.694 ± 0.552 |
43.94 ± 2.31 |
216.98 ± 7.96 |
| MX1 |
-0.594 ± 0.060 |
-0.420 ± 0.072 |
0.686 ± 0.550 |
43.30 ± 3.81 |
215.28 ± 6.48 |
| MX2 |
-0.577 ± 0.044 |
-0.419 ± 0.054 |
0.701 ± 0.554 |
44.51 ± 2.29 |
215.98 ± 5.08 |
| MX3 |
-0.570 ± 0.049 |
-0.421 ± 0.054 |
0.706 ± 0.555 |
44.91 ± 3.43 |
216.45 ± 4.84 |
| RH08 |
-0.568 ± 0.034 |
-0.272 ± 0.023 |
0.777 ± 0.560 |
50.94 ± 2.66 |
205.57 ± 1.69 |
| RH09 |
-0.625 ± 0.053 |
-0.272 ± 0.053 |
0.732 ± 0.560 |
47.04 ± 4.13 |
203.57 ± 4.50 |
| RH10 |
-0.699 ± 0.049 |
-0.262 ± 0.059 |
0.665 ± 0.543 |
41.67 ± 4.08 |
200.56 ± 4.64 |
| Average |
-0.642 |
-0.359 |
0.610 |
38.972 |
209.556 |
| Median |
-0.577 |
-0.375 |
0.701 |
44.509 |
215.280 |
| Deviation |
0.122 |
0.077 |
0.281 |
17.803 |
7.224 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
30.9 ± 1.5 |
377.6 ± 4.1 |
3.63 ± 0.37 |
| VC |
59.3 ± 1.2 |
275.1 ± 3.3 |
3.63 ± 0.37 |
| MX1 |
57.9 ± 1.2 |
282.0 ± 3.3 |
3.63 ± 0.37 |
| MX2 |
59.1 ± 1.2 |
275.8 ± 3.3 |
3.63 ± 0.37 |
| MX3 |
59.6 ± 1.2 |
273.2 ± 3.3 |
3.63 ± 0.37 |
| RH08 |
58.2 ± 1.1 |
272.4 ± 3.0 |
3.63 ± 0.37 |
| RH09 |
54.3 ± 1.1 |
293.4 ± 3.2 |
3.63 ± 0.37 |
| RH10 |
48.9 ± 1.2 |
320.5 ± 3.4 |
3.63 ± 0.37 |
| Average |
53.5 |
296.2 |
3.63 |
| Median |
58.2 |
282.0 |
3.63 |
| Deviation |
9.8 |
36.6 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
43.9 ± 1.1 |
21.2 ± 0.5 |
27.5 ± 0.4 |
37.8 ± 0.7 |
2.07 ± 0.07 |
1.16 ± 0.04 |
| VC |
66.7 ± 1.3 |
11.4 ± 0.3 |
16.4 ± 0.2 |
41.8 ± 0.8 |
5.86 ± 0.17 |
1.60 ± 0.04 |
| MX1 |
66.7 ± 1.3 |
11.9 ± 0.3 |
17.0 ± 0.2 |
41.7 ± 0.8 |
5.61 ± 0.16 |
1.60 ± 0.04 |
| MX2 |
66.7 ± 1.3 |
11.5 ± 0.3 |
16.5 ± 0.2 |
41.8 ± 0.8 |
5.81 ± 0.17 |
1.60 ± 0.04 |
| MX3 |
66.7 ± 1.3 |
11.3 ± 0.3 |
16.3 ± 0.2 |
41.8 ± 0.8 |
5.90 ± 0.17 |
1.60 ± 0.04 |
| RH8 |
65.6 ± 1.2 |
11.8 ± 0.3 |
16.9 ± 0.2 |
41.7 ± 0.8 |
5.55 ± 0.16 |
1.57 ± 0.04 |
| RH9 |
66.1 ± 1.2 |
13.2 ± 0.3 |
18.7 ± 0.3 |
41.3 ± 0.8 |
5.02 ± 0.14 |
1.60 ± 0.04 |
| RH10 |
66.1 ± 1.2 |
15.1 ± 0.3 |
21.1 ± 0.3 |
40.6 ± 0.8 |
4.37 ± 0.13 |
1.63 ± 0.04 |
| Average |
63.6 |
13.4 |
18.8 |
41.0 |
5.0 |
1.5 |
| Median |
66.7 |
11.9 |
17.0 |
41.7 |
5.6 |
1.6 |
| Deviation |
8.0 |
3.4 |
3.9 |
1.4 |
1.3 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
13.1 ± 2.7 |
23.5 ± 0.9 |
27.1 ± 1.9 |
43.2 ± 2.5 |
0.56 ± 0.14 |
0.31 ± 0.08 |
| VC |
18.2 ± 1.7 |
12.7 ± 0.5 |
16.1 ± 1.1 |
47.5 ± 2.5 |
1.44 ± 0.17 |
0.38 ± 0.04 |
| MX1 |
18.2 ± 1.7 |
13.2 ± 0.5 |
16.7 ± 1.2 |
47.4 ± 2.5 |
1.38 ± 0.16 |
0.38 ± 0.04 |
| MX2 |
18.2 ± 1.7 |
12.8 ± 0.5 |
16.2 ± 1.1 |
47.5 ± 2.5 |
1.42 ± 0.16 |
0.38 ± 0.04 |
| MX3 |
18.2 ± 1.7 |
12.6 ± 0.5 |
16.0 ± 1.1 |
47.6 ± 2.5 |
1.45 ± 0.17 |
0.38 ± 0.04 |
| RH8 |
17.8 ± 1.5 |
13.2 ± 0.5 |
16.6 ± 1.2 |
47.4 ± 2.5 |
1.36 ± 0.15 |
0.38 ± 0.04 |
| RH9 |
18.3 ± 1.6 |
14.7 ± 0.6 |
18.4 ± 1.3 |
47.0 ± 2.5 |
1.25 ± 0.15 |
0.39 ± 0.05 |
| RH10 |
18.7 ± 1.8 |
16.8 ± 0.7 |
20.7 ± 1.4 |
46.2 ± 2.5 |
1.11 ± 0.15 |
0.41 ± 0.06 |
| Average |
17.6 |
14.9 |
18.5 |
46.7 |
1.2 |
0.4 |
| Median |
18.2 |
13.2 |
16.7 |
47.4 |
1.4 |
0.4 |
| Deviation |
1.8 |
3.7 |
3.8 |
1.5 |
0.3 |
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)
| 
