Database: Ace Shock Analysis
Event ID: 19992342248
Observation time: 08/22/1999 234.95068 2248 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
234.950683 |
| Arrival time of shock [seconds of day] |
82139.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.039 |
| Y GSE location of spacecraft [Re] |
-0.002 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0011 |
| Upstream field points selected for analysis |
0042 |
| Downstream plasma points selected for analysis |
0011
|
| Downstream field points selected for analysis |
0044 |
| Minimum chisq/dof for RH8,RH9,RH10 |
6.31, 41.42, 42.06 |
Event added to database
|
Sat Apr 30 21:44:44 2005
|
Event last processed
|
Wed Oct 15 15:20:36 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.010 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-412.8 ± 1.8 |
-431.5 ± 2.5 |
| Vy GSE [km/s] |
2.2 ± 2.2 |
-13.7 ± 5.8 |
| Vz GSE [km/s] |
1.3 ± 2.5 |
12.6 ± 1.9 |
| Wi [km/s] |
9.5 ± 0.6 |
10.7 ± 1.0 |
| We [km/s] |
301.4 ± 18.4 |
339.9 ± 32.7 |
| Ni [n/cc] |
2.5 ± 0.3 |
4.3 ± 0.7 |
| Bx GSE [nT] |
0.5 ± 0.0 |
-0.2 ± 0.2 |
| By GSE [nT] |
-0.5 ± 0.2 |
-0.5 ± 0.4 |
| Bz GSE [nT] |
-7.6 ± 0.0 |
-9.6 ± 0.1 |
Plasma Beta
|
0.009 ± 0.009
|
0.012 ± 0.012
|
Sound Speed [km/s]
|
12.25 ± 0.73
|
13.90 ± 1.34
|
Alfven Speed [km/s]
|
100.84 ± 4.96
|
99.39 ± 7.64
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.923 ± 0.073 |
0.136 ± 0.418 |
0.360 ± 0.344 |
21.10 ± 6.37 |
171.63 ± 25.97 |
| VC |
-0.703 ± 0.101 |
-0.573 ± 0.119 |
0.422 ± 0.395 |
24.93 ± 6.61 |
219.22 ± 9.39 |
| MX1 |
-0.740 ± 0.114 |
-0.625 ± 0.131 |
0.249 ± 0.243 |
14.40 ± 10.57 |
220.22 ± 9.92 |
| MX2 |
-0.749 ± 0.108 |
-0.612 ± 0.128 |
0.253 ± 0.247 |
14.66 ± 10.33 |
219.26 ± 9.50 |
| MX3 |
-0.776 ± 0.093 |
-0.572 ± 0.119 |
0.265 ± 0.259 |
15.38 ± 9.66 |
216.42 ± 8.57 |
| RH08 |
-0.811 ± 0.013 |
0.559 ± 0.019 |
0.173 ± 0.171 |
9.97 ± 0.29 |
145.40 ± 1.31 |
| RH09 |
-0.925 ± 0.027 |
-0.223 ± 0.069 |
0.307 ± 0.297 |
17.89 ± 4.01 |
193.54 ± 4.24 |
| RH10 |
-0.929 ± 0.026 |
-0.224 ± 0.069 |
0.296 ± 0.287 |
17.22 ± 4.00 |
193.54 ± 4.24 |
| Average |
-0.819 |
-0.267 |
0.291 |
16.945 |
197.403 |
| Median |
-0.776 |
-0.224 |
0.296 |
17.223 |
216.419 |
| Deviation |
0.093 |
0.428 |
0.075 |
4.549 |
27.344 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
64.8 ± 0.5 |
425.8 ± 20.0 |
1.73 ± 0.42 |
| VC |
64.7 ± 0.5 |
353.7 ± 32.6 |
1.73 ± 0.42 |
| MX1 |
75.3 ± 0.5 |
367.6 ± 32.8 |
1.73 ± 0.42 |
| MX2 |
74.9 ± 0.5 |
371.6 ± 32.7 |
1.73 ± 0.42 |
| MX3 |
73.9 ± 0.5 |
382.4 ± 32.4 |
1.73 ± 0.42 |
| RH08 |
75.0 ± 0.8 |
356.3 ± 10.0 |
1.73 ± 0.42 |
| RH09 |
69.5 ± 0.4 |
438.6 ± 27.5 |
1.73 ± 0.42 |
| RH10 |
70.2 ± 0.4 |
440.0 ± 27.5 |
1.73 ± 0.42 |
| Average |
71.0 |
392.0 |
1.73 |
| Median |
73.9 |
382.4 |
1.73 |
| Deviation |
4.5 |
36.8 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
44.4 ± 1.6 |
5.2 ± 0.3 |
42.9 ± 2.1 |
101.4 ± 5.0 |
8.58 ± 0.44 |
0.44 ± 0.01 |
| VC |
64.5 ± 2.2 |
5.2 ± 0.3 |
43.1 ± 2.1 |
101.4 ± 5.0 |
12.43 ± 0.82 |
0.64 ± 0.03 |
| MX1 |
63.4 ± 2.2 |
3.1 ± 0.2 |
25.7 ± 1.3 |
101.5 ± 5.0 |
20.56 ± 1.41 |
0.63 ± 0.03 |
| MX2 |
63.4 ± 2.2 |
3.2 ± 0.2 |
26.2 ± 1.3 |
101.5 ± 5.0 |
20.11 ± 1.38 |
0.63 ± 0.03 |
| MX3 |
63.2 ± 2.2 |
3.4 ± 0.2 |
27.9 ± 1.4 |
101.5 ± 5.0 |
18.84 ± 1.27 |
0.62 ± 0.03 |
| RH8 |
20.6 ± 1.3 |
3.2 ± 0.2 |
26.2 ± 1.3 |
101.5 ± 5.0 |
6.53 ± 0.28 |
0.20 ± 0.01 |
| RH9 |
57.1 ± 1.9 |
4.3 ± 0.3 |
35.3 ± 1.7 |
101.5 ± 5.0 |
13.43 ± 0.80 |
0.56 ± 0.02 |
| RH10 |
57.0 ± 1.8 |
4.1 ± 0.2 |
34.2 ± 1.7 |
101.5 ± 5.0 |
13.84 ± 0.82 |
0.56 ± 0.02 |
| Average |
54.2 |
3.9 |
32.7 |
101.5 |
14.3 |
0.5 |
| Median |
63.2 |
4.1 |
34.2 |
101.5 |
13.8 |
0.6 |
| Deviation |
15.1 |
0.9 |
7.4 |
0.0 |
5.2 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
24.9 ± 2.1 |
5.9 ± 0.6 |
42.3 ± 3.3 |
100.2 ± 7.7 |
4.27 ± 0.47 |
0.25 ± 0.03 |
| VC |
37.4 ± 5.0 |
5.9 ± 0.6 |
42.5 ± 3.3 |
100.2 ± 7.7 |
6.37 ± 0.87 |
0.38 ± 0.05 |
| MX1 |
36.8 ± 5.2 |
3.5 ± 0.3 |
25.3 ± 1.9 |
100.3 ± 7.7 |
10.53 ± 1.49 |
0.37 ± 0.05 |
| MX2 |
36.8 ± 5.1 |
3.6 ± 0.3 |
25.9 ± 2.0 |
100.3 ± 7.7 |
10.29 ± 1.44 |
0.37 ± 0.05 |
| MX3 |
36.5 ± 5.0 |
3.8 ± 0.4 |
27.5 ± 2.1 |
100.3 ± 7.7 |
9.61 ± 1.32 |
0.37 ± 0.05 |
| RH8 |
12.0 ± 2.5 |
3.6 ± 0.3 |
25.8 ± 2.0 |
100.3 ± 7.7 |
3.40 ± 0.86 |
0.12 ± 0.03 |
| RH9 |
32.6 ± 3.5 |
4.8 ± 0.5 |
34.8 ± 2.7 |
100.2 ± 7.7 |
6.78 ± 0.79 |
0.33 ± 0.04 |
| RH10 |
32.5 ± 3.5 |
4.7 ± 0.4 |
33.7 ± 2.6 |
100.2 ± 7.7 |
6.99 ± 0.82 |
0.33 ± 0.04 |
| Average |
31.2 |
4.5 |
32.2 |
100.3 |
7.3 |
0.3 |
| Median |
36.5 |
4.7 |
33.7 |
100.3 |
7.0 |
0.4 |
| Deviation |
8.8 |
1.0 |
7.3 |
0.0 |
2.7 |
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)
| 
