Database: Ace Shock Analysis
Event ID: 20012391919
Observation time: 08/27/2001 239.80501 1919 [UT]
|
|
General
Information (About, Top)
| Year |
2001 |
| Fractional day of year |
239.805012 |
| Arrival time of shock [seconds of day] |
69553.0 ± 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 |
0013 |
| Upstream field points selected for analysis |
0052 |
| Downstream plasma points selected for analysis |
0013
|
| Downstream field points selected for analysis |
0051 |
| Minimum chisq/dof for RH8,RH9,RH10 |
15.31, 18.67, 21.51 |
Event added to database
|
Sat Apr 30 21:51:59 2005
|
Event last processed
|
Tue May 3 14:03:15 2005
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.004 ± 0.002
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-452.3 ± 3.2 |
-549.4 ± 4.9 |
| Vy GSE [km/s] |
3.4 ± 3.0 |
-28.9 ± 6.2 |
| Vz GSE [km/s] |
-15.4 ± 3.6 |
70.6 ± 8.2 |
| Wi [km/s] |
41.4 ± 2.4 |
71.6 ± 3.4 |
| We [km/s] |
1309.0 ± 77.3 |
2263.6 ± 108.1 |
| Ni [n/cc] |
5.8 ± 0.4 |
17.2 ± 1.3 |
| Bx GSE [nT] |
1.3 ± 0.8 |
8.9 ± 1.4 |
| By GSE [nT] |
-5.0 ± 0.4 |
-15.1 ± 1.0 |
| Bz GSE [nT] |
-3.3 ± 0.7 |
-1.6 ± 1.6 |
Plasma Beta
|
0.558 ± 0.515
|
0.593 ± 0.600
|
Sound Speed [km/s]
|
53.44 ± 3.16
|
92.41 ± 4.41
|
Alfven Speed [km/s]
|
56.33 ± 4.53
|
93.62 ± 5.20
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.873 ± 0.503 |
-0.221 ± 1.057 |
-0.435 ± 0.405 |
-25.78 ± 58.07 |
194.19 ± 69.03 |
| VC |
-0.728 ± 0.045 |
-0.241 ± 0.047 |
0.642 ± 0.535 |
39.96 ± 4.01 |
198.32 ± 3.56 |
| MX1 |
-0.721 ± 0.085 |
-0.439 ± 0.106 |
0.537 ± 0.478 |
32.45 ± 7.50 |
211.34 ± 7.92 |
| MX2 |
-0.668 ± 0.068 |
-0.382 ± 0.085 |
0.639 ± 0.533 |
39.74 ± 5.14 |
209.77 ± 6.86 |
| MX3 |
-0.651 ± 0.071 |
-0.366 ± 0.082 |
0.666 ± 0.544 |
41.73 ± 5.58 |
209.33 ± 6.68 |
| RH08 |
-0.525 ± 0.011 |
-0.323 ± 0.008 |
0.788 ± 0.559 |
51.97 ± 0.87 |
211.59 ± 0.55 |
| RH09 |
-0.409 ± 0.062 |
-0.252 ± 0.057 |
0.877 ± 0.514 |
61.29 ± 4.27 |
211.59 ± 6.34 |
| RH10 |
-0.525 ± 0.059 |
-0.349 ± 0.064 |
0.777 ± 0.560 |
50.94 ± 4.07 |
213.59 ± 6.10 |
| Average |
-0.637 |
-0.321 |
0.561 |
36.539 |
207.464 |
| Median |
-0.651 |
-0.323 |
0.666 |
41.732 |
211.344 |
| Deviation |
0.146 |
0.077 |
0.416 |
26.747 |
7.125 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
77.3 ± 8.8 |
483.0 ± 10.9 |
2.99 ± 0.27 |
| VC |
72.3 ± 3.8 |
519.3 ± 13.0 |
2.99 ± 0.27 |
| MX1 |
85.0 ± 3.8 |
511.9 ± 12.5 |
2.99 ± 0.27 |
| MX2 |
79.9 ± 3.6 |
489.4 ± 13.0 |
2.99 ± 0.27 |
| MX3 |
78.5 ± 3.6 |
481.6 ± 13.1 |
2.99 ± 0.27 |
| RH08 |
74.3 ± 3.7 |
418.1 ± 13.7 |
2.99 ± 0.27 |
| RH09 |
69.5 ± 4.3 |
356.8 ± 14.3 |
2.99 ± 0.27 |
| RH10 |
75.9 ± 3.7 |
418.3 ± 13.6 |
2.99 ± 0.27 |
| Average |
76.6 |
459.8 |
2.99 |
| Median |
77.3 |
483.0 |
2.99 |
| Deviation |
4.8 |
56.3 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
82.1 ± 4.1 |
8.5 ± 0.4 |
12.4 ± 1.0 |
77.3 ± 3.2 |
9.63 ± 0.41 |
1.06 ± 0.05 |
| VC |
200.8 ± 2.7 |
11.9 ± 0.5 |
17.1 ± 1.4 |
76.9 ± 3.2 |
16.98 ± 0.78 |
2.62 ± 0.12 |
| MX1 |
195.7 ± 2.8 |
3.3 ± 0.1 |
4.9 ± 0.4 |
77.7 ± 3.2 |
58.60 ± 2.54 |
2.52 ± 0.11 |
| MX2 |
198.6 ± 2.7 |
6.8 ± 0.3 |
9.9 ± 0.8 |
77.5 ± 3.2 |
29.28 ± 1.32 |
2.57 ± 0.11 |
| MX3 |
198.8 ± 2.6 |
7.7 ± 0.3 |
11.2 ± 0.9 |
77.4 ± 3.2 |
25.85 ± 1.18 |
2.57 ± 0.12 |
| RH8 |
194.0 ± 2.6 |
10.5 ± 0.5 |
15.2 ± 1.2 |
77.1 ± 3.2 |
18.45 ± 0.89 |
2.52 ± 0.12 |
| RH9 |
186.1 ± 2.7 |
13.7 ± 0.6 |
19.7 ± 1.6 |
76.5 ± 3.1 |
13.59 ± 0.69 |
2.44 ± 0.12 |
| RH10 |
194.0 ± 2.6 |
9.5 ± 0.4 |
13.7 ± 1.1 |
77.2 ± 3.2 |
20.53 ± 0.98 |
2.52 ± 0.12 |
| Average |
181.3 |
9.0 |
13.0 |
77.2 |
24.1 |
2.4 |
| Median |
195.7 |
9.5 |
13.7 |
77.3 |
20.5 |
2.5 |
| Deviation |
40.3 |
3.2 |
4.6 |
0.4 |
15.3 |
0.5 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
27.7 ± 7.4 |
14.5 ± 0.4 |
20.6 ± 1.1 |
130.9 ± 3.7 |
1.91 ± 0.52 |
0.21 ± 0.06 |
| VC |
67.2 ± 4.4 |
20.1 ± 0.6 |
28.4 ± 1.6 |
130.1 ± 3.7 |
3.33 ± 0.21 |
0.52 ± 0.03 |
| MX1 |
65.4 ± 3.9 |
5.7 ± 0.2 |
8.1 ± 0.5 |
131.5 ± 3.7 |
11.51 ± 0.72 |
0.50 ± 0.03 |
| MX2 |
66.5 ± 4.2 |
11.5 ± 0.3 |
16.4 ± 0.9 |
131.2 ± 3.7 |
5.76 ± 0.36 |
0.51 ± 0.03 |
| MX3 |
66.6 ± 4.3 |
13.1 ± 0.4 |
18.6 ± 1.0 |
131.0 ± 3.7 |
5.09 ± 0.33 |
0.51 ± 0.03 |
| RH8 |
64.9 ± 5.0 |
17.9 ± 0.5 |
25.3 ± 1.4 |
130.4 ± 3.7 |
3.62 ± 0.27 |
0.50 ± 0.04 |
| RH9 |
62.8 ± 5.9 |
23.3 ± 0.7 |
32.8 ± 1.8 |
129.6 ± 3.7 |
2.69 ± 0.24 |
0.48 ± 0.04 |
| RH10 |
65.0 ± 4.9 |
16.1 ± 0.5 |
22.8 ± 1.3 |
130.7 ± 3.7 |
4.04 ± 0.30 |
0.50 ± 0.04 |
| Average |
60.8 |
15.3 |
21.6 |
130.7 |
4.7 |
0.5 |
| Median |
65.4 |
16.1 |
22.8 |
130.9 |
4.0 |
0.5 |
| Deviation |
13.4 |
5.4 |
7.6 |
0.6 |
3.0 |
0.1 |
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)
| 
