Database: Ace Shock Analysis
Event ID: 19983160631
Observation time: 11/12/1998 316.27182 0631 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
316.271817 |
| Arrival time of shock [seconds of day] |
23485.0 ± 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 |
0009 |
| Upstream field points selected for analysis |
0040 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0038 |
| Minimum chisq/dof for RH8,RH9,RH10 |
6.80, 14.03, 14.22 |
Event added to database
|
Sat Apr 30 21:43:29 2005
|
Event last processed
|
Wed Oct 15 14:43:44 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-344.2 ± 3.6 |
-363.3 ± 2.7 |
| Vy GSE [km/s] |
-10.8 ± 3.5 |
-15.6 ± 2.0 |
| Vz GSE [km/s] |
-16.1 ± 3.7 |
-14.3 ± 5.9 |
| Wi [km/s] |
26.9 ± 2.9 |
31.5 ± 1.9 |
| We [km/s] |
852.1 ± 91.3 |
995.4 ± 60.6 |
| Ni [n/cc] |
5.6 ± 1.0 |
9.6 ± 1.4 |
| Bx GSE [nT] |
4.3 ± 0.3 |
5.1 ± 0.5 |
| By GSE [nT] |
-3.8 ± 0.6 |
-6.0 ± 0.4 |
| Bz GSE [nT] |
-2.5 ± 0.3 |
-2.6 ± 0.8 |
Plasma Beta
|
0.224 ± 0.236
|
0.291 ± 0.293
|
Sound Speed [km/s]
|
34.81 ± 3.73
|
40.42 ± 2.45
|
Alfven Speed [km/s]
|
57.10 ± 3.33
|
58.09 ± 3.75
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.867 ± 0.364 |
-0.152 ± 0.476 |
0.474 ± 0.435 |
28.28 ± 43.57 |
189.96 ± 31.18 |
| VC |
-0.969 ± 0.054 |
-0.219 ± 0.180 |
0.114 ± 0.114 |
6.56 ± 18.08 |
192.76 ± 10.63 |
| MX1 |
-0.918 ± 0.105 |
-0.394 ± 0.244 |
0.036 ± 0.036 |
2.07 ± 19.80 |
203.23 ± 15.22 |
| MX2 |
-0.918 ± 0.104 |
-0.387 ± 0.240 |
0.085 ± 0.084 |
4.86 ± 18.59 |
202.86 ± 14.97 |
| MX3 |
-0.912 ± 0.110 |
-0.376 ± 0.235 |
0.166 ± 0.164 |
9.54 ± 20.20 |
202.41 ± 14.68 |
| RH08 |
-0.993 ± 0.002 |
-0.096 ± 0.013 |
-0.073 ± 0.072 |
-4.16 ± 1.00 |
185.52 ± 0.77 |
| RH09 |
-0.999 ± 0.003 |
0.009 ± 0.068 |
-0.039 ± 0.039 |
-2.24 ± 4.06 |
179.50 ± 3.91 |
| RH10 |
-0.999 ± 0.003 |
0.009 ± 0.068 |
-0.039 ± 0.039 |
-2.24 ± 4.06 |
179.50 ± 3.91 |
| Average |
-0.947 |
-0.201 |
0.090 |
5.332 |
191.967 |
| Median |
-0.918 |
-0.152 |
0.085 |
4.856 |
192.758 |
| Deviation |
0.050 |
0.171 |
0.176 |
10.432 |
10.085 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
46.9 ± 4.8 |
337.0 ± 27.5 |
1.81 ± 0.52 |
| VC |
55.3 ± 5.8 |
382.7 ± 26.6 |
1.81 ± 0.52 |
| MX1 |
66.6 ± 5.8 |
367.0 ± 26.1 |
1.81 ± 0.52 |
| MX2 |
65.2 ± 5.8 |
367.1 ± 26.5 |
1.81 ± 0.52 |
| MX3 |
63.0 ± 5.6 |
363.4 ± 27.0 |
1.81 ± 0.52 |
| RH08 |
54.0 ± 6.0 |
390.4 ± 24.5 |
1.81 ± 0.52 |
| RH09 |
48.0 ± 6.0 |
390.4 ± 24.1 |
1.81 ± 0.52 |
| RH10 |
48.0 ± 6.0 |
390.4 ± 24.1 |
1.81 ± 0.52 |
| Average |
55.9 |
373.6 |
1.81 |
| Median |
55.3 |
382.7 |
1.81 |
| Deviation |
8.1 |
18.8 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
44.2 ± 3.9 |
21.4 ± 2.0 |
39.0 ± 2.3 |
63.4 ± 4.0 |
2.08 ± 0.25 |
0.70 ± 0.08 |
| VC |
48.6 ± 4.1 |
17.5 ± 1.6 |
32.5 ± 1.9 |
64.6 ± 4.1 |
2.79 ± 0.26 |
0.75 ± 0.07 |
| MX1 |
47.2 ± 4.5 |
12.0 ± 1.1 |
22.6 ± 1.3 |
65.8 ± 4.3 |
3.96 ± 0.37 |
0.72 ± 0.07 |
| MX2 |
48.2 ± 4.5 |
12.7 ± 1.2 |
24.0 ± 1.4 |
65.7 ± 4.2 |
3.81 ± 0.36 |
0.73 ± 0.07 |
| MX3 |
48.1 ± 4.4 |
13.8 ± 1.3 |
25.9 ± 1.5 |
65.5 ± 4.2 |
3.51 ± 0.35 |
0.74 ± 0.07 |
| RH8 |
46.5 ± 3.8 |
18.1 ± 1.7 |
33.5 ± 2.0 |
64.4 ± 4.1 |
2.58 ± 0.21 |
0.72 ± 0.06 |
| RH9 |
45.9 ± 3.5 |
20.9 ± 2.0 |
38.2 ± 2.2 |
63.6 ± 4.0 |
2.20 ± 0.19 |
0.72 ± 0.06 |
| RH10 |
45.9 ± 3.5 |
20.9 ± 2.0 |
38.2 ± 2.2 |
63.6 ± 4.0 |
2.20 ± 0.19 |
0.72 ± 0.06 |
| Average |
46.8 |
17.2 |
31.8 |
64.6 |
2.9 |
0.7 |
| Median |
47.2 |
18.1 |
33.5 |
64.6 |
2.8 |
0.7 |
| Deviation |
1.5 |
3.9 |
6.7 |
1.0 |
0.8 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
26.4 ± 2.4 |
24.1 ± 1.4 |
39.7 ± 2.6 |
66.5 ± 4.1 |
1.10 ± 0.14 |
0.40 ± 0.05 |
| VC |
29.0 ± 2.6 |
19.7 ± 1.2 |
33.1 ± 2.1 |
68.0 ± 4.2 |
1.48 ± 0.16 |
0.43 ± 0.05 |
| MX1 |
27.8 ± 2.9 |
13.4 ± 0.8 |
23.0 ± 1.5 |
69.5 ± 4.2 |
2.08 ± 0.24 |
0.40 ± 0.05 |
| MX2 |
28.8 ± 2.8 |
14.2 ± 0.8 |
24.4 ± 1.6 |
69.3 ± 4.2 |
2.03 ± 0.22 |
0.42 ± 0.05 |
| MX3 |
28.8 ± 2.5 |
15.4 ± 0.9 |
26.4 ± 1.7 |
69.1 ± 4.2 |
1.87 ± 0.20 |
0.42 ± 0.05 |
| RH8 |
27.4 ± 3.2 |
20.3 ± 1.2 |
34.1 ± 2.2 |
67.8 ± 4.2 |
1.35 ± 0.16 |
0.40 ± 0.05 |
| RH9 |
27.1 ± 3.0 |
23.5 ± 1.4 |
38.9 ± 2.5 |
66.7 ± 4.1 |
1.15 ± 0.14 |
0.41 ± 0.05 |
| RH10 |
27.1 ± 3.0 |
23.5 ± 1.4 |
38.9 ± 2.5 |
66.7 ± 4.1 |
1.15 ± 0.14 |
0.41 ± 0.05 |
| Average |
27.8 |
19.3 |
32.3 |
68.0 |
1.5 |
0.4 |
| Median |
27.8 |
20.3 |
34.1 |
68.0 |
1.5 |
0.4 |
| Deviation |
1.0 |
4.4 |
6.9 |
1.2 |
0.4 |
0.0 |
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)
| 
