Database: Ace Shock Analysis
Event ID: 19981131728
Observation time: 04/23/1998 113.72803 1728 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
113.728032 |
| Arrival time of shock [seconds of day] |
62902.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.036 |
| Y GSE location of spacecraft [Re] |
-0.006 |
| Z GSE location of spacecraft [Re] |
-0.002 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0039 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0038 |
| Minimum chisq/dof for RH8,RH9,RH10 |
5.36, 8.70, 8.89 |
Event added to database
|
Sat Apr 30 21:42:12 2005
|
Event last processed
|
Wed Oct 15 14:17:04 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.009 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-322.9 ± 2.0 |
-371.6 ± 2.5 |
| Vy GSE [km/s] |
-16.0 ± 1.5 |
-33.0 ± 1.6 |
| Vz GSE [km/s] |
8.3 ± 1.7 |
16.4 ± 2.4 |
| Wi [km/s] |
30.8 ± 0.7 |
36.0 ± 1.9 |
| We [km/s] |
973.3 ± 22.4 |
1139.0 ± 60.8 |
| Ni [n/cc] |
11.7 ± 0.7 |
41.1 ± 4.1 |
| Bx GSE [nT] |
-3.7 ± 0.1 |
-4.5 ± 0.3 |
| By GSE [nT] |
1.8 ± 0.1 |
6.9 ± 0.4 |
| Bz GSE [nT] |
-0.9 ± 0.3 |
0.9 ± 0.8 |
Plasma Beta
|
1.348 ± 1.366
|
1.600 ± 1.590
|
Sound Speed [km/s]
|
39.75 ± 0.93
|
46.11 ± 2.22
|
Alfven Speed [km/s]
|
26.58 ± 1.03
|
28.28 ± 1.83
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.921 ± 0.040 |
0.001 ± 0.100 |
-0.390 ± 0.369 |
-22.95 ± 5.83 |
179.93 ± 6.25 |
| VC |
-0.932 ± 0.019 |
-0.328 ± 0.050 |
0.154 ± 0.153 |
8.85 ± 2.93 |
199.37 ± 3.05 |
| MX1 |
-0.977 ± 0.018 |
-0.193 ± 0.084 |
0.093 ± 0.093 |
5.34 ± 4.64 |
191.16 ± 4.90 |
| MX2 |
-0.962 ± 0.018 |
-0.219 ± 0.070 |
0.163 ± 0.162 |
9.40 ± 2.53 |
192.85 ± 4.19 |
| MX3 |
-0.955 ± 0.018 |
-0.229 ± 0.068 |
0.190 ± 0.188 |
10.97 ± 2.18 |
193.47 ± 4.09 |
| RH08 |
-0.985 ± 0.002 |
-0.130 ± 0.009 |
0.117 ± 0.117 |
6.74 ± 0.68 |
187.52 ± 0.55 |
| RH09 |
-0.981 ± 0.013 |
-0.147 ± 0.061 |
0.128 ± 0.128 |
7.38 ± 4.12 |
188.52 ± 3.58 |
| RH10 |
-0.981 ± 0.013 |
-0.147 ± 0.063 |
0.128 ± 0.128 |
7.38 ± 4.10 |
188.52 ± 3.69 |
| Average |
-0.962 |
-0.174 |
0.073 |
4.140 |
190.168 |
| Median |
-0.962 |
-0.147 |
0.128 |
7.382 |
191.156 |
| Deviation |
0.024 |
0.095 |
0.189 |
11.081 |
5.617 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
27.0 ± 3.3 |
353.3 ± 4.4 |
3.55 ± 0.34 |
| VC |
48.8 ± 2.7 |
380.7 ± 4.9 |
3.55 ± 0.34 |
| MX1 |
40.0 ± 2.7 |
391.7 ± 5.1 |
3.55 ± 0.34 |
| MX2 |
43.3 ± 2.8 |
388.2 ± 5.2 |
3.55 ± 0.34 |
| MX3 |
44.6 ± 2.9 |
386.4 ± 5.2 |
3.55 ± 0.34 |
| RH08 |
37.4 ± 2.8 |
392.6 ± 5.3 |
3.55 ± 0.34 |
| RH09 |
38.6 ± 2.8 |
392.1 ± 5.2 |
3.55 ± 0.34 |
| RH10 |
38.6 ± 2.8 |
392.1 ± 5.2 |
3.55 ± 0.34 |
| Average |
39.8 |
384.6 |
3.55 |
| Median |
40.0 |
391.7 |
3.55 |
| Deviation |
6.4 |
13.3 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
59.2 ± 1.6 |
22.2 ± 0.7 |
23.7 ± 0.9 |
42.3 ± 0.9 |
2.67 ± 0.12 |
1.40 ± 0.05 |
| VC |
73.2 ± 1.7 |
15.3 ± 0.4 |
17.5 ± 0.7 |
45.3 ± 0.9 |
4.77 ± 0.19 |
1.62 ± 0.05 |
| MX1 |
72.4 ± 1.8 |
18.3 ± 0.5 |
20.4 ± 0.8 |
44.2 ± 0.9 |
3.96 ± 0.17 |
1.64 ± 0.06 |
| MX2 |
72.8 ± 1.9 |
17.2 ± 0.5 |
19.3 ± 0.7 |
44.6 ± 0.9 |
4.23 ± 0.18 |
1.63 ± 0.06 |
| MX3 |
72.9 ± 1.9 |
16.8 ± 0.5 |
18.9 ± 0.7 |
44.8 ± 0.9 |
4.34 ± 0.18 |
1.63 ± 0.06 |
| RH8 |
71.6 ± 1.9 |
19.1 ± 0.6 |
21.1 ± 0.8 |
43.8 ± 0.9 |
3.75 ± 0.17 |
1.64 ± 0.06 |
| RH9 |
71.9 ± 1.9 |
18.8 ± 0.6 |
20.8 ± 0.8 |
44.0 ± 0.9 |
3.84 ± 0.17 |
1.64 ± 0.06 |
| RH10 |
71.9 ± 1.9 |
18.8 ± 0.6 |
20.8 ± 0.8 |
44.0 ± 0.9 |
3.84 ± 0.17 |
1.64 ± 0.06 |
| Average |
70.7 |
18.3 |
20.3 |
44.1 |
3.9 |
1.6 |
| Median |
72.4 |
18.8 |
20.8 |
44.2 |
4.0 |
1.6 |
| Deviation |
4.7 |
2.0 |
1.8 |
0.9 |
0.6 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
17.8 ± 2.0 |
24.0 ± 1.5 |
25.2 ± 1.6 |
48.5 ± 2.4 |
0.75 ± 0.12 |
0.37 ± 0.06 |
| VC |
21.4 ± 1.7 |
16.7 ± 1.0 |
18.6 ± 1.2 |
51.5 ± 2.6 |
1.29 ± 0.15 |
0.42 ± 0.05 |
| MX1 |
21.3 ± 1.8 |
19.8 ± 1.2 |
21.7 ± 1.4 |
50.3 ± 2.5 |
1.08 ± 0.14 |
0.42 ± 0.05 |
| MX2 |
21.4 ± 1.8 |
18.7 ± 1.1 |
20.6 ± 1.3 |
50.8 ± 2.6 |
1.15 ± 0.14 |
0.42 ± 0.05 |
| MX3 |
21.5 ± 1.8 |
18.2 ± 1.1 |
20.1 ± 1.3 |
50.9 ± 2.6 |
1.18 ± 0.15 |
0.42 ± 0.05 |
| RH8 |
21.1 ± 1.9 |
20.7 ± 1.3 |
22.5 ± 1.5 |
50.0 ± 2.5 |
1.02 ± 0.13 |
0.42 ± 0.05 |
| RH9 |
21.2 ± 1.9 |
20.3 ± 1.2 |
22.1 ± 1.4 |
50.1 ± 2.5 |
1.05 ± 0.14 |
0.42 ± 0.05 |
| RH10 |
21.2 ± 1.9 |
20.3 ± 1.2 |
22.1 ± 1.4 |
50.1 ± 2.5 |
1.05 ± 0.14 |
0.42 ± 0.05 |
| Average |
20.8 |
19.8 |
21.6 |
50.3 |
1.1 |
0.4 |
| Median |
21.3 |
20.3 |
22.1 |
50.3 |
1.1 |
0.4 |
| Deviation |
1.2 |
2.1 |
1.9 |
0.9 |
0.2 |
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)
| 
