Database: Ace Shock Analysis
Event ID: 19991251459
Observation time: 05/05/1999 125.62454 1459 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
125.624537 |
| Arrival time of shock [seconds of day] |
53960.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
-0.003 |
| Z GSE location of spacecraft [Re] |
-0.003 |
| Upstream plasma points selected for analysis |
0008 |
| Upstream field points selected for analysis |
0030 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0035 |
| Minimum chisq/dof for RH8,RH9,RH10 |
17.16, 20.51, 21.12 |
Event added to database
|
Sat Apr 30 21:43:59 2005
|
Event last processed
|
Wed Oct 15 14:58:07 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-377.6 ± 0.9 |
-427.1 ± 2.1 |
| Vy GSE [km/s] |
-29.6 ± 1.3 |
-65.0 ± 4.4 |
| Vz GSE [km/s] |
18.0 ± 1.0 |
42.9 ± 2.4 |
| Wi [km/s] |
26.4 ± 1.1 |
31.2 ± 1.8 |
| We [km/s] |
833.9 ± 33.7 |
986.2 ± 55.8 |
| Ni [n/cc] |
4.8 ± 0.3 |
15.0 ± 0.9 |
| Bx GSE [nT] |
2.0 ± 0.2 |
5.9 ± 0.2 |
| By GSE [nT] |
-2.7 ± 0.3 |
-4.6 ± 0.3 |
| Bz GSE [nT] |
1.2 ± 0.5 |
6.5 ± 0.3 |
Plasma Beta
|
0.568 ± 0.548
|
0.333 ± 0.356
|
Sound Speed [km/s]
|
34.34 ± 1.23
|
40.56 ± 2.37
|
Alfven Speed [km/s]
|
35.63 ± 2.20
|
54.76 ± 2.25
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.468 ± 0.701 |
0.803 ± 0.417 |
0.369 ± 0.351 |
21.62 ± 15.76 |
120.25 ± 49.92 |
| VC |
-0.754 ± 0.041 |
-0.538 ± 0.055 |
0.378 ± 0.359 |
22.20 ± 2.29 |
215.53 ± 4.12 |
| MX1 |
-0.758 ± 0.057 |
-0.534 ± 0.080 |
0.374 ± 0.356 |
21.98 ± 2.05 |
215.14 ± 6.01 |
| MX2 |
-0.758 ± 0.046 |
-0.534 ± 0.064 |
0.374 ± 0.355 |
21.94 ± 2.26 |
215.17 ± 4.79 |
| MX3 |
-0.758 ± 0.044 |
-0.535 ± 0.060 |
0.373 ± 0.355 |
21.90 ± 2.46 |
215.21 ± 4.48 |
| RH08 |
-0.797 ± 0.006 |
-0.490 ± 0.008 |
0.352 ± 0.337 |
20.61 ± 0.56 |
211.59 ± 0.58 |
| RH09 |
-0.806 ± 0.038 |
-0.458 ± 0.057 |
0.374 ± 0.356 |
21.98 ± 3.54 |
209.58 ± 3.99 |
| RH10 |
-0.806 ± 0.038 |
-0.458 ± 0.058 |
0.374 ± 0.356 |
21.98 ± 3.61 |
209.58 ± 4.06 |
| Average |
-0.738 |
-0.343 |
0.371 |
21.777 |
201.507 |
| Median |
-0.758 |
-0.490 |
0.374 |
21.978 |
215.142 |
| Deviation |
0.112 |
0.464 |
0.008 |
0.498 |
32.933 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
40.3 ± 7.2 |
164.2 ± 6.8 |
3.03 ± 0.37 |
| VC |
83.9 ± 1.5 |
404.7 ± 5.3 |
3.03 ± 0.37 |
| MX1 |
84.4 ± 1.5 |
406.3 ± 5.3 |
3.03 ± 0.37 |
| MX2 |
84.3 ± 1.5 |
406.3 ± 5.3 |
3.03 ± 0.37 |
| MX3 |
84.3 ± 1.5 |
406.3 ± 5.3 |
3.03 ± 0.37 |
| RH08 |
87.9 ± 1.5 |
419.0 ± 5.1 |
3.03 ± 0.37 |
| RH09 |
89.2 ± 1.3 |
421.6 ± 5.1 |
3.03 ± 0.37 |
| RH10 |
89.2 ± 1.3 |
421.6 ± 5.1 |
3.03 ± 0.37 |
| Average |
80.4 |
381.3 |
3.03 |
| Median |
84.4 |
406.3 |
3.03 |
| Deviation |
16.4 |
88.0 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
4.2 ± 1.5 |
20.7 ± 0.4 |
27.2 ± 1.7 |
45.0 ± 0.9 |
0.20 ± 0.07 |
0.09 ± 0.03 |
| VC |
97.7 ± 0.8 |
2.6 ± 0.0 |
3.8 ± 0.2 |
49.5 ± 1.0 |
37.54 ± 0.76 |
1.98 ± 0.04 |
| MX1 |
97.7 ± 0.8 |
2.4 ± 0.0 |
3.5 ± 0.2 |
49.5 ± 1.0 |
40.20 ± 0.81 |
1.97 ± 0.04 |
| MX2 |
97.7 ± 0.8 |
2.4 ± 0.0 |
3.5 ± 0.2 |
49.5 ± 1.0 |
40.08 ± 0.81 |
1.97 ± 0.04 |
| MX3 |
97.7 ± 0.8 |
2.4 ± 0.0 |
3.5 ± 0.2 |
49.5 ± 1.0 |
39.92 ± 0.80 |
1.97 ± 0.04 |
| RH8 |
97.3 ± 0.8 |
0.9 ± 0.0 |
1.3 ± 0.1 |
49.5 ± 1.0 |
107.58 ± 2.20 |
1.96 ± 0.04 |
| RH9 |
96.9 ± 0.8 |
0.3 ± 0.0 |
0.5 ± 0.0 |
49.5 ± 1.0 |
284.89 ± 5.90 |
1.96 ± 0.04 |
| RH10 |
96.9 ± 0.8 |
0.3 ± 0.0 |
0.5 ± 0.0 |
49.5 ± 1.0 |
284.89 ± 5.90 |
1.96 ± 0.04 |
| Average |
85.7 |
4.0 |
5.5 |
48.9 |
104.4 |
1.7 |
| Median |
97.7 |
2.4 |
3.5 |
49.5 |
40.2 |
2.0 |
| Deviation |
33.0 |
6.8 |
8.9 |
1.6 |
115.2 |
0.7 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
1.1 ± 4.4 |
27.0 ± 1.0 |
41.8 ± 1.7 |
62.6 ± 1.4 |
0.04 ± 0.17 |
0.02 ± 0.07 |
| VC |
31.7 ± 2.0 |
3.4 ± 0.1 |
5.8 ± 0.2 |
68.1 ± 1.4 |
9.24 ± 0.65 |
0.47 ± 0.03 |
| MX1 |
31.7 ± 2.0 |
3.2 ± 0.1 |
5.4 ± 0.2 |
68.1 ± 1.4 |
9.89 ± 0.69 |
0.47 ± 0.03 |
| MX2 |
31.7 ± 2.0 |
3.2 ± 0.1 |
5.4 ± 0.2 |
68.1 ± 1.4 |
9.86 ± 0.69 |
0.47 ± 0.03 |
| MX3 |
31.7 ± 2.0 |
3.2 ± 0.1 |
5.4 ± 0.2 |
68.1 ± 1.4 |
9.82 ± 0.68 |
0.47 ± 0.03 |
| RH8 |
31.5 ± 2.0 |
1.2 ± 0.0 |
2.0 ± 0.1 |
68.2 ± 1.4 |
26.40 ± 1.79 |
0.46 ± 0.03 |
| RH9 |
31.3 ± 2.0 |
0.4 ± 0.0 |
0.8 ± 0.0 |
68.2 ± 1.4 |
69.78 ± 4.71 |
0.46 ± 0.03 |
| RH10 |
31.3 ± 2.0 |
0.4 ± 0.0 |
0.8 ± 0.0 |
68.2 ± 1.4 |
69.78 ± 4.71 |
0.46 ± 0.03 |
| Average |
27.7 |
5.3 |
8.4 |
67.5 |
25.6 |
0.4 |
| Median |
31.7 |
3.2 |
5.4 |
68.1 |
9.9 |
0.5 |
| Deviation |
10.8 |
8.9 |
13.7 |
2.0 |
28.2 |
0.2 |
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)
| 
