Database: Ace Shock Analysis
Event ID: 19992351130
Observation time: 08/23/1999 235.47920 1130 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
235.479201 |
| Arrival time of shock [seconds of day] |
41403.0 ± 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 |
0008 |
| Upstream field points selected for analysis |
0032 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0037 |
| Minimum chisq/dof for RH8,RH9,RH10 |
93.27, 99.42, 108.92 |
Event added to database
|
Sat Apr 30 21:44:47 2005
|
Event last processed
|
Wed Oct 15 15:23:09 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.005 ± 0.073
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-385.6 ± 3.8 |
-410.0 ± 2.1 |
| Vy GSE [km/s] |
-13.4 ± 2.5 |
-20.0 ± 2.4 |
| Vz GSE [km/s] |
14.5 ± 2.8 |
22.5 ± 2.8 |
| Wi [km/s] |
13.6 ± 0.9 |
22.4 ± 0.8 |
| We [km/s] |
429.3 ± 29.6 |
709.5 ± 25.3 |
| Ni [n/cc] |
7.2 ± 0.6 |
8.9 ± 0.9 |
| Bx GSE [nT] |
-4.4 ± 0.4 |
-6.2 ± 0.4 |
| By GSE [nT] |
5.1 ± 0.2 |
7.4 ± 0.2 |
| Bz GSE [nT] |
-4.7 ± 0.3 |
-7.6 ± 0.2 |
Plasma Beta
|
0.044 ± 0.043
|
0.064 ± 0.064
|
Sound Speed [km/s]
|
17.55 ± 1.21
|
28.91 ± 1.24
|
Alfven Speed [km/s]
|
65.28 ± 2.75
|
89.03 ± 4.80
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.857 ± 0.233 |
0.211 ± 0.635 |
0.471 ± 0.432 |
28.08 ± 21.71 |
166.19 ± 42.35 |
| VC |
-0.928 ± 0.048 |
-0.252 ± 0.128 |
0.275 ± 0.268 |
15.97 ± 7.11 |
195.17 ± 7.87 |
| MX1 |
-0.904 ± 0.065 |
-0.293 ± 0.170 |
0.312 ± 0.302 |
18.19 ± 6.54 |
197.98 ± 10.73 |
| MX2 |
-0.904 ± 0.065 |
-0.292 ± 0.168 |
0.313 ± 0.302 |
18.22 ± 6.77 |
197.92 ± 10.62 |
| MX3 |
-0.904 ± 0.065 |
-0.290 ± 0.166 |
0.314 ± 0.303 |
18.29 ± 7.28 |
197.78 ± 10.48 |
| RH08 |
-0.482 ± 0.025 |
-0.529 ± 0.025 |
0.698 ± 0.553 |
44.29 ± 2.00 |
227.63 ± 2.00 |
| RH09 |
-0.473 ± 0.047 |
-0.537 ± 0.046 |
0.698 ± 0.553 |
44.29 ± 3.44 |
228.64 ± 4.10 |
| RH10 |
-0.466 ± 0.061 |
-0.529 ± 0.058 |
0.709 ± 0.556 |
45.19 ± 4.02 |
228.64 ± 5.52 |
| Average |
-0.740 |
-0.314 |
0.474 |
29.065 |
204.992 |
| Median |
-0.857 |
-0.292 |
0.471 |
28.081 |
197.979 |
| Deviation |
0.221 |
0.246 |
0.198 |
13.356 |
21.987 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
71.1 ± 3.1 |
456.1 ± 277.2 |
1.23 ± 0.12 |
| VC |
79.3 ± 2.7 |
511.1 ± 312.8 |
1.23 ± 0.12 |
| MX1 |
82.7 ± 2.7 |
501.8 ± 310.0 |
1.23 ± 0.12 |
| MX2 |
82.7 ± 2.7 |
501.8 ± 310.0 |
1.23 ± 0.12 |
| MX3 |
82.7 ± 2.7 |
501.9 ± 310.1 |
1.23 ± 0.12 |
| RH08 |
62.2 ± 2.9 |
314.9 ± 219.1 |
1.23 ± 0.12 |
| RH09 |
61.5 ± 2.9 |
310.3 ± 216.7 |
1.23 ± 0.12 |
| RH10 |
61.2 ± 2.9 |
306.6 ± 1809.1 |
1.23 ± 0.12 |
| Average |
72.9 |
425.6 |
1.23 |
| Median |
79.3 |
501.8 |
1.23 |
| Deviation |
10.1 |
96.7 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
121.8 ± 4.7 |
5.5 ± 0.3 |
21.1 ± 0.9 |
67.4 ± 2.6 |
22.26 ± 1.91 |
1.81 ± 0.10 |
| VC |
146.0 ± 4.1 |
3.2 ± 0.2 |
12.2 ± 0.5 |
67.5 ± 2.6 |
46.36 ± 3.46 |
2.16 ± 0.10 |
| MX1 |
145.0 ± 4.1 |
2.1 ± 0.1 |
8.3 ± 0.3 |
67.6 ± 2.6 |
67.95 ± 5.05 |
2.15 ± 0.10 |
| MX2 |
145.0 ± 4.1 |
2.1 ± 0.1 |
8.3 ± 0.3 |
67.6 ± 2.6 |
67.74 ± 5.04 |
2.15 ± 0.10 |
| MX3 |
144.9 ± 4.1 |
2.2 ± 0.1 |
8.3 ± 0.4 |
67.6 ± 2.6 |
67.21 ± 5.00 |
2.15 ± 0.10 |
| RH8 |
111.8 ± 3.5 |
8.0 ± 0.5 |
30.5 ± 1.3 |
67.1 ± 2.6 |
14.10 ± 1.06 |
1.67 ± 0.08 |
| RH9 |
110.7 ± 3.5 |
8.1 ± 0.5 |
31.1 ± 1.3 |
67.1 ± 2.6 |
13.67 ± 1.02 |
1.65 ± 0.08 |
| RH10 |
109.7 ± 3.5 |
8.2 ± 0.5 |
31.5 ± 1.3 |
67.1 ± 2.6 |
13.40 ± 1.01 |
1.64 ± 0.08 |
| Average |
129.4 |
4.9 |
18.9 |
67.4 |
39.1 |
1.9 |
| Median |
144.9 |
5.5 |
21.1 |
67.5 |
46.4 |
2.1 |
| Deviation |
17.3 |
2.9 |
10.9 |
0.2 |
25.9 |
0.3 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
98.4 ± 2.4 |
8.9 ± 0.4 |
28.8 ± 1.6 |
93.2 ± 4.7 |
11.04 ± 0.55 |
1.06 ± 0.07 |
| VC |
119.2 ± 2.6 |
5.1 ± 0.2 |
16.6 ± 0.9 |
93.5 ± 4.7 |
23.27 ± 1.15 |
1.28 ± 0.08 |
| MX1 |
118.2 ± 2.7 |
3.5 ± 0.1 |
11.3 ± 0.6 |
93.6 ± 4.7 |
34.07 ± 1.70 |
1.27 ± 0.08 |
| MX2 |
118.2 ± 2.7 |
3.5 ± 0.1 |
11.3 ± 0.6 |
93.6 ± 4.7 |
33.96 ± 1.70 |
1.27 ± 0.08 |
| MX3 |
118.2 ± 2.7 |
3.5 ± 0.1 |
11.4 ± 0.6 |
93.6 ± 4.7 |
33.70 ± 1.68 |
1.27 ± 0.08 |
| RH8 |
90.9 ± 2.7 |
12.9 ± 0.5 |
41.5 ± 2.2 |
92.7 ± 4.8 |
7.04 ± 0.39 |
0.98 ± 0.07 |
| RH9 |
90.1 ± 2.7 |
13.2 ± 0.6 |
42.4 ± 2.3 |
92.7 ± 4.8 |
6.82 ± 0.37 |
0.97 ± 0.07 |
| RH10 |
89.2 ± 2.7 |
13.4 ± 0.6 |
42.9 ± 2.3 |
92.7 ± 4.8 |
6.68 ± 0.37 |
0.97 ± 0.07 |
| Average |
105.3 |
8.0 |
25.8 |
93.2 |
19.6 |
1.1 |
| Median |
118.2 |
8.9 |
28.8 |
93.5 |
23.3 |
1.3 |
| Deviation |
14.3 |
4.6 |
14.8 |
0.4 |
13.0 |
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)
| 
