Database: Ace Shock Analysis
Event ID: 19981280921
Observation time: 05/08/1998 128.38986 0921 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
128.389861 |
| Arrival time of shock [seconds of day] |
33684.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
-0.004 |
| Z GSE location of spacecraft [Re] |
-0.003 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0037 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0043 |
| Minimum chisq/dof for RH8,RH9,RH10 |
1.52, 2.69, 2.74 |
Event added to database
|
Sat Apr 30 21:42:26 2005
|
Event last processed
|
Wed Oct 15 14:20:02 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.006 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-531.7 ± 3.5 |
-596.2 ± 8.7 |
| Vy GSE [km/s] |
44.0 ± 5.8 |
51.0 ± 24.2 |
| Vz GSE [km/s] |
-4.5 ± 16.3 |
-1.5 ± 27.4 |
| Wi [km/s] |
74.1 ± 1.2 |
82.0 ± 4.8 |
| We [km/s] |
2342.9 ± 38.7 |
2592.1 ± 151.3 |
| Ni [n/cc] |
5.7 ± 0.5 |
9.8 ± 0.8 |
| Bx GSE [nT] |
5.1 ± 0.6 |
4.3 ± 2.0 |
| By GSE [nT] |
-4.5 ± 0.5 |
-6.6 ± 3.6 |
| Bz GSE [nT] |
0.5 ± 2.2 |
3.6 ± 4.7 |
Plasma Beta
|
1.306 ± 1.299
|
1.274 ± 1.236
|
Sound Speed [km/s]
|
95.76 ± 1.67
|
105.86 ± 6.21
|
Alfven Speed [km/s]
|
64.95 ± 2.24
|
73.19 ± 4.25
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.898 ± 0.171 |
0.432 ± 0.349 |
-0.081 ± 0.081 |
-4.67 ± 27.82 |
154.34 ± 22.24 |
| VC |
-0.996 ± 0.028 |
0.088 ± 0.310 |
0.009 ± 0.009 |
0.52 ± 21.99 |
174.96 ± 17.86 |
| MX1 |
-0.939 ± 0.169 |
0.298 ± 0.509 |
-0.175 ± 0.173 |
-10.05 ± 17.89 |
162.41 ± 31.06 |
| MX2 |
-0.969 ± 0.082 |
0.188 ± 0.371 |
-0.160 ± 0.159 |
-9.23 ± 14.56 |
169.04 ± 21.91 |
| MX3 |
-0.979 ± 0.062 |
0.151 ± 0.333 |
-0.136 ± 0.135 |
-7.82 ± 14.61 |
171.21 ± 19.46 |
| RH08 |
-0.984 ± 0.004 |
0.165 ± 0.023 |
-0.073 ± 0.072 |
-4.16 ± 1.44 |
170.47 ± 1.34 |
| RH09 |
-0.977 ± 0.015 |
0.199 ± 0.067 |
-0.073 ± 0.072 |
-4.16 ± 4.03 |
168.47 ± 3.95 |
| RH10 |
-0.977 ± 0.015 |
0.199 ± 0.067 |
-0.073 ± 0.072 |
-4.16 ± 4.03 |
168.47 ± 3.95 |
| Average |
-0.965 |
0.215 |
-0.095 |
-5.468 |
167.423 |
| Median |
-0.977 |
0.199 |
-0.073 |
-4.165 |
169.037 |
| Deviation |
0.032 |
0.105 |
0.060 |
3.428 |
6.342 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
22.5 ± 6.5 |
639.0 ± 26.1 |
1.77 ± 0.19 |
| VC |
39.2 ± 7.7 |
687.6 ± 24.5 |
1.77 ± 0.19 |
| MX1 |
29.3 ± 5.7 |
660.3 ± 24.0 |
1.77 ± 0.19 |
| MX2 |
34.5 ± 5.5 |
675.0 ± 24.8 |
1.77 ± 0.19 |
| MX3 |
36.2 ± 5.6 |
678.4 ± 25.0 |
1.77 ± 0.19 |
| RH08 |
35.2 ± 6.3 |
682.3 ± 24.4 |
1.77 ± 0.19 |
| RH09 |
33.5 ± 6.3 |
680.4 ± 24.3 |
1.77 ± 0.19 |
| RH10 |
33.5 ± 6.3 |
680.4 ± 24.3 |
1.77 ± 0.19 |
| Average |
33.0 |
672.9 |
1.77 |
| Median |
34.5 |
680.4 |
1.77 |
| Deviation |
5.1 |
15.8 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
142.4 ± 2.7 |
57.1 ± 1.8 |
60.0 ± 2.1 |
100.6 ± 1.9 |
2.49 ± 0.06 |
1.42 ± 0.02 |
| VC |
154.3 ± 3.7 |
45.2 ± 1.4 |
50.3 ± 1.7 |
106.5 ± 2.2 |
3.41 ± 0.05 |
1.45 ± 0.02 |
| MX1 |
147.5 ± 2.1 |
52.6 ± 1.6 |
56.7 ± 2.0 |
103.0 ± 2.1 |
2.80 ± 0.09 |
1.43 ± 0.03 |
| MX2 |
150.8 ± 2.2 |
48.8 ± 1.5 |
53.5 ± 1.8 |
104.9 ± 2.1 |
3.09 ± 0.09 |
1.44 ± 0.03 |
| MX3 |
150.5 ± 2.3 |
47.6 ± 1.4 |
52.4 ± 1.8 |
105.5 ± 2.2 |
3.16 ± 0.08 |
1.43 ± 0.03 |
| RH8 |
151.8 ± 2.8 |
48.3 ± 1.5 |
53.0 ± 1.8 |
105.1 ± 2.2 |
3.14 ± 0.06 |
1.44 ± 0.02 |
| RH9 |
151.8 ± 2.8 |
49.6 ± 1.5 |
54.2 ± 1.9 |
104.5 ± 2.1 |
3.06 ± 0.06 |
1.45 ± 0.02 |
| RH10 |
151.8 ± 2.8 |
49.6 ± 1.5 |
54.2 ± 1.9 |
104.5 ± 2.1 |
3.06 ± 0.06 |
1.45 ± 0.02 |
| Average |
150.1 |
49.9 |
54.3 |
104.3 |
3.0 |
1.4 |
| Median |
151.8 |
49.6 |
54.2 |
104.9 |
3.1 |
1.4 |
| Deviation |
3.7 |
3.6 |
2.9 |
1.8 |
0.3 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
81.3 ± 11.8 |
64.0 ± 3.0 |
67.6 ± 3.9 |
111.7 ± 5.5 |
1.27 ± 0.20 |
0.73 ± 0.12 |
| VC |
89.2 ± 9.2 |
50.6 ± 2.1 |
56.7 ± 3.3 |
118.4 ± 5.2 |
1.77 ± 0.21 |
0.76 ± 0.10 |
| MX1 |
85.3 ± 8.5 |
59.0 ± 2.7 |
63.8 ± 3.7 |
114.5 ± 5.3 |
1.45 ± 0.17 |
0.75 ± 0.10 |
| MX2 |
87.5 ± 8.1 |
54.7 ± 2.4 |
60.3 ± 3.5 |
116.6 ± 5.3 |
1.60 ± 0.17 |
0.75 ± 0.10 |
| MX3 |
86.7 ± 8.2 |
53.3 ± 2.3 |
59.1 ± 3.4 |
117.2 ± 5.2 |
1.63 ± 0.18 |
0.74 ± 0.10 |
| RH8 |
87.3 ± 8.8 |
54.1 ± 2.3 |
59.8 ± 3.5 |
116.9 ± 5.3 |
1.62 ± 0.19 |
0.75 ± 0.10 |
| RH9 |
87.4 ± 9.1 |
55.5 ± 2.4 |
61.0 ± 3.5 |
116.2 ± 5.3 |
1.58 ± 0.19 |
0.76 ± 0.10 |
| RH10 |
87.4 ± 9.1 |
55.5 ± 2.4 |
61.0 ± 3.5 |
116.2 ± 5.3 |
1.58 ± 0.19 |
0.76 ± 0.10 |
| Average |
86.5 |
55.8 |
61.2 |
116.0 |
1.6 |
0.7 |
| Median |
87.4 |
55.5 |
61.0 |
116.6 |
1.6 |
0.8 |
| Deviation |
2.4 |
4.1 |
3.3 |
2.1 |
0.1 |
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)
| 
