Database: Ace Shock Analysis
Event ID: 20112600255
Observation time: 09/17/2011 260.12199 0255 [UT]
|
|
General
Information (About, Top)
| Year |
2011 |
| Fractional day of year |
260.121993 |
| Arrival time of shock [seconds of day] |
10540.2 ± 20.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
239.948 |
| Y GSE location of spacecraft [Re] |
-35.967 |
| Z GSE location of spacecraft [Re] |
-20.968 |
| Upstream plasma points selected for analysis |
0004 |
| Upstream field points selected for analysis |
0258 |
| Downstream plasma points selected for analysis |
0007
|
| Downstream field points selected for analysis |
0406 |
| Minimum chisq/dof for RH8,RH9,RH10 |
16.34, 25.38, 29.76 |
Event added to database
|
Tue Oct 14 15:57:28 2014
|
Event last processed
|
Tue Oct 14 16:46:05 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
70.791 ± 26.040
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-367.4 ± 7.0 |
-443.4 ± 4.6 |
| Vy GSE [km/s] |
-39.4 ± 1.4 |
-61.2 ± 3.0 |
| Vz GSE [km/s] |
22.7 ± 1.3 |
56.0 ± 7.7 |
| Wi [km/s] |
15.9 ± 2.2 |
30.5 ± 2.8 |
| We [km/s] |
502.2 ± 70.0 |
963.7 ± 88.3 |
| Ni [n/cc] |
3.9 ± 0.4 |
7.6 ± 0.7 |
| Bx GSE [nT] |
1.1 ± 0.4 |
1.4 ± 0.3 |
| By GSE [nT] |
-3.5 ± 0.3 |
-8.6 ± 0.4 |
| Bz GSE [nT] |
-2.2 ± 0.6 |
-4.9 ± 0.5 |
Plasma Beta
|
0.111 ± 0.136
|
0.151 ± 0.154
|
Sound Speed [km/s]
|
20.50 ± 2.86
|
39.34 ± 3.60
|
Alfven Speed [km/s]
|
48.50 ± 2.31
|
79.32 ± 4.05
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.955 ± 0.232 |
-0.246 ± 0.787 |
0.165 ± 0.164 |
9.50 ± 40.19 |
194.47 ± 47.19 |
| VC |
-0.886 ± 0.030 |
-0.256 ± 0.040 |
0.386 ± 0.366 |
22.70 ± 4.29 |
196.10 ± 2.56 |
| MX1 |
-0.886 ± 0.030 |
-0.252 ± 0.072 |
0.388 ± 0.367 |
22.82 ± 3.43 |
195.90 ± 4.62 |
| MX2 |
-0.887 ± 0.029 |
-0.252 ± 0.069 |
0.387 ± 0.366 |
22.77 ± 3.31 |
195.85 ± 4.42 |
| MX3 |
-0.887 ± 0.028 |
-0.251 ± 0.067 |
0.386 ± 0.366 |
22.73 ± 3.29 |
195.82 ± 4.30 |
| RH08 |
-0.619 ± 0.011 |
0.337 ± 0.012 |
-0.709 ± 0.556 |
-45.19 ± 0.81 |
151.42 ± 1.05 |
| RH09 |
-0.708 ± 0.046 |
0.294 ± 0.060 |
-0.642 ± 0.535 |
-39.98 ± 3.80 |
157.44 ± 4.67 |
| RH10 |
-0.665 ± 0.051 |
0.318 ± 0.064 |
-0.676 ± 0.547 |
-42.53 ± 3.97 |
154.43 ± 5.22 |
| Average |
-0.812 |
-0.039 |
-0.039 |
-3.396 |
180.177 |
| Median |
-0.886 |
-0.246 |
0.386 |
22.701 |
195.817 |
| Deviation |
0.127 |
0.294 |
0.533 |
32.774 |
21.388 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
82.4 ± 3.5 |
537.5 ± 6.0 |
1.92 ± 0.28 |
| VC |
77.4 ± 2.8 |
522.4 ± 6.5 |
1.92 ± 0.28 |
| MX1 |
77.2 ± 2.8 |
522.4 ± 6.5 |
1.92 ± 0.28 |
| MX2 |
77.2 ± 2.8 |
522.6 ± 6.5 |
1.92 ± 0.28 |
| MX3 |
77.2 ± 2.8 |
522.7 ± 6.5 |
1.92 ± 0.28 |
| RH08 |
85.7 ± 9.6 |
230.5 ± 1.7 |
1.92 ± 0.28 |
| RH09 |
84.5 ± 9.4 |
287.7 ± 1.8 |
1.92 ± 0.28 |
| RH10 |
85.0 ± 9.5 |
258.9 ± 8.9 |
1.92 ± 0.28 |
| Average |
80.8 |
425.6 |
1.92 |
| Median |
82.4 |
522.4 |
1.92 |
| Deviation |
3.9 |
138.9 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
173.1 ± 7.1 |
2.5 ± 0.3 |
6.4 ± 0.3 |
52.7 ± 1.2 |
70.66 ± 10.31 |
3.29 ± 0.15 |
| VC |
178.0 ± 6.9 |
4.1 ± 0.5 |
10.6 ± 0.5 |
52.6 ± 1.2 |
43.80 ± 6.35 |
3.39 ± 0.15 |
| MX1 |
178.0 ± 6.9 |
4.2 ± 0.5 |
10.8 ± 0.5 |
52.6 ± 1.2 |
43.06 ± 6.25 |
3.39 ± 0.15 |
| MX2 |
178.0 ± 6.9 |
4.2 ± 0.5 |
10.8 ± 0.5 |
52.6 ± 1.2 |
43.02 ± 6.24 |
3.39 ± 0.15 |
| MX3 |
178.0 ± 6.9 |
4.2 ± 0.5 |
10.8 ± 0.5 |
52.6 ± 1.2 |
42.99 ± 6.24 |
3.39 ± 0.15 |
| RH8 |
32.5 ± 3.2 |
1.4 ± 0.2 |
3.6 ± 0.2 |
52.7 ± 1.2 |
23.59 ± 4.57 |
0.62 ± 0.06 |
| RH9 |
53.8 ± 4.0 |
1.8 ± 0.2 |
4.7 ± 0.2 |
52.7 ± 1.2 |
30.05 ± 5.18 |
1.02 ± 0.08 |
| RH10 |
42.5 ± 3.6 |
1.7 ± 0.2 |
4.3 ± 0.2 |
52.7 ± 1.2 |
26.10 ± 4.74 |
0.81 ± 0.07 |
| Average |
126.7 |
3.0 |
7.7 |
52.6 |
40.4 |
2.4 |
| Median |
178.0 |
4.1 |
10.6 |
52.7 |
43.0 |
3.4 |
| Deviation |
69.7 |
1.3 |
3.3 |
0.1 |
14.8 |
1.3 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
89.7 ± 5.1 |
4.6 ± 0.3 |
10.5 ± 0.5 |
88.5 ± 2.9 |
19.37 ± 1.02 |
1.01 ± 0.06 |
| VC |
92.2 ± 6.2 |
7.7 ± 0.5 |
17.3 ± 0.9 |
88.3 ± 2.9 |
11.99 ± 0.57 |
1.04 ± 0.08 |
| MX1 |
92.2 ± 6.2 |
7.8 ± 0.5 |
17.6 ± 0.9 |
88.3 ± 2.9 |
11.79 ± 0.56 |
1.05 ± 0.08 |
| MX2 |
92.2 ± 6.2 |
7.8 ± 0.5 |
17.6 ± 0.9 |
88.3 ± 2.9 |
11.78 ± 0.56 |
1.05 ± 0.08 |
| MX3 |
92.2 ± 6.2 |
7.8 ± 0.5 |
17.6 ± 0.9 |
88.3 ± 2.9 |
11.77 ± 0.56 |
1.04 ± 0.08 |
| RH8 |
16.4 ± 5.5 |
2.6 ± 0.2 |
5.9 ± 0.3 |
88.6 ± 2.9 |
6.38 ± 2.32 |
0.18 ± 0.06 |
| RH9 |
27.8 ± 5.1 |
3.4 ± 0.2 |
7.7 ± 0.4 |
88.6 ± 2.9 |
8.28 ± 1.81 |
0.31 ± 0.05 |
| RH10 |
21.4 ± 5.3 |
3.1 ± 0.2 |
7.0 ± 0.4 |
88.6 ± 2.9 |
7.02 ± 1.97 |
0.24 ± 0.06 |
| Average |
65.5 |
5.6 |
12.6 |
88.4 |
11.0 |
0.7 |
| Median |
92.2 |
7.7 |
17.3 |
88.5 |
11.8 |
1.0 |
| Deviation |
36.3 |
2.4 |
5.4 |
0.1 |
4.1 |
0.4 |
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)
| 
