Database: Ace Shock Analysis
Event ID: 19983552250
Observation time: 12/21/1998 355.95140 2250 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
355.951400 |
| Arrival time of shock [seconds of day] |
82201.0 ± 24.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.035 |
| Y GSE location of spacecraft [Re] |
0.005 |
| Z GSE location of spacecraft [Re] |
-0.002 |
| Upstream plasma points selected for analysis |
0007 |
| Upstream field points selected for analysis |
0037 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0043 |
| Minimum chisq/dof for RH8,RH9,RH10 |
4.40, 5.07, 5.20 |
Event added to database
|
Sat Apr 30 21:43:32 2005
|
Event last processed
|
Wed Oct 15 14:46:08 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] |
-355.1 ± 2.1 |
-381.3 ± 1.3 |
| Vy GSE [km/s] |
13.2 ± 6.3 |
-2.5 ± 6.1 |
| Vz GSE [km/s] |
51.5 ± 4.1 |
10.7 ± 5.0 |
| Wi [km/s] |
42.8 ± 1.1 |
51.4 ± 0.6 |
| We [km/s] |
1352.8 ± 34.7 |
1626.9 ± 19.2 |
| Ni [n/cc] |
12.7 ± 0.8 |
20.0 ± 1.1 |
| Bx GSE [nT] |
-8.2 ± 0.4 |
-10.7 ± 0.6 |
| By GSE [nT] |
0.3 ± 1.7 |
1.9 ± 1.2 |
| Bz GSE [nT] |
-2.1 ± 1.5 |
5.4 ± 0.8 |
Plasma Beta
|
0.660 ± 0.686
|
0.755 ± 0.747
|
Sound Speed [km/s]
|
55.34 ± 1.40
|
66.47 ± 0.73
|
Alfven Speed [km/s]
|
52.98 ± 3.03
|
59.42 ± 2.83
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.957 ± 0.027 |
0.026 ± 0.159 |
-0.290 ± 0.282 |
-16.85 ± 5.31 |
178.46 ± 9.55 |
| VC |
-0.531 ± 0.112 |
-0.307 ± 0.132 |
-0.790 ± 0.558 |
-52.20 ± 7.29 |
210.02 ± 13.19 |
| MX1 |
-0.956 ± 0.024 |
-0.013 ± 0.126 |
-0.292 ± 0.284 |
-16.99 ± 4.61 |
180.75 ± 7.56 |
| MX2 |
-0.951 ± 0.027 |
-0.133 ± 0.107 |
-0.279 ± 0.272 |
-16.22 ± 4.56 |
187.99 ± 6.43 |
| MX3 |
-0.933 ± 0.042 |
-0.248 ± 0.131 |
-0.262 ± 0.256 |
-15.18 ± 5.41 |
194.90 ± 8.02 |
| RH08 |
-0.994 ± 0.002 |
-0.061 ± 0.019 |
-0.095 ± 0.095 |
-5.45 ± 1.03 |
183.51 ± 1.08 |
| RH09 |
-0.995 ± 0.007 |
-0.061 ± 0.068 |
-0.084 ± 0.084 |
-4.81 ± 3.56 |
183.51 ± 3.94 |
| RH10 |
-0.995 ± 0.007 |
-0.061 ± 0.069 |
-0.084 ± 0.084 |
-4.81 ± 3.69 |
183.51 ± 3.98 |
| Average |
-0.914 |
-0.107 |
-0.272 |
-16.564 |
187.829 |
| Median |
-0.956 |
-0.061 |
-0.262 |
-15.181 |
183.510 |
| Deviation |
0.157 |
0.115 |
0.230 |
15.455 |
10.255 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
10.1 ± 7.1 |
425.1 ± 2.1 |
1.57 ± 0.14 |
| VC |
44.8 ± 11.0 |
286.9 ± 3.3 |
1.57 ± 0.14 |
| MX1 |
10.0 ± 7.5 |
426.8 ± 2.1 |
1.57 ± 0.14 |
| MX2 |
12.4 ± 8.6 |
427.9 ± 2.2 |
1.57 ± 0.14 |
| MX3 |
17.1 ± 10.0 |
422.0 ± 2.4 |
1.57 ± 0.14 |
| RH08 |
15.2 ± 5.3 |
430.8 ± 1.7 |
1.57 ± 0.14 |
| RH09 |
15.6 ± 5.2 |
430.7 ± 1.7 |
1.57 ± 0.14 |
| RH10 |
15.6 ± 5.2 |
430.7 ± 12.7 |
1.57 ± 0.14 |
| Average |
17.6 |
410.1 |
1.57 |
| Median |
15.6 |
427.9 |
1.57 |
| Deviation |
11.3 |
49.9 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
99.7 ± 2.1 |
48.8 ± 1.5 |
52.2 ± 3.0 |
59.1 ± 1.9 |
2.04 ± 0.07 |
1.69 ± 0.06 |
| VC |
142.8 ± 3.7 |
29.3 ± 0.9 |
37.6 ± 2.1 |
70.8 ± 2.2 |
4.87 ± 0.25 |
2.02 ± 0.10 |
| MX1 |
102.1 ± 2.1 |
48.9 ± 1.5 |
52.2 ± 3.0 |
59.0 ± 1.9 |
2.09 ± 0.08 |
1.73 ± 0.06 |
| MX2 |
106.1 ± 2.0 |
47.7 ± 1.4 |
51.7 ± 3.0 |
60.0 ± 1.9 |
2.23 ± 0.09 |
1.77 ± 0.07 |
| MX3 |
107.2 ± 2.3 |
45.3 ± 1.4 |
50.6 ± 2.9 |
61.8 ± 1.9 |
2.37 ± 0.10 |
1.74 ± 0.07 |
| RH8 |
83.3 ± 2.0 |
46.3 ± 1.4 |
51.1 ± 2.9 |
61.1 ± 1.9 |
1.80 ± 0.06 |
1.36 ± 0.05 |
| RH9 |
82.3 ± 2.0 |
46.0 ± 1.4 |
51.0 ± 2.9 |
61.3 ± 1.9 |
1.79 ± 0.06 |
1.34 ± 0.05 |
| RH10 |
82.3 ± 2.0 |
46.0 ± 1.4 |
51.0 ± 2.9 |
61.3 ± 1.9 |
1.79 ± 0.06 |
1.34 ± 0.05 |
| Average |
100.7 |
44.8 |
49.7 |
61.8 |
2.4 |
1.6 |
| Median |
102.1 |
46.3 |
51.1 |
61.3 |
2.1 |
1.7 |
| Deviation |
20.1 |
6.4 |
4.9 |
3.8 |
1.0 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
63.5 ± 2.0 |
56.1 ± 2.2 |
58.5 ± 2.8 |
69.3 ± 1.0 |
1.13 ± 0.04 |
0.92 ± 0.02 |
| VC |
92.1 ± 2.9 |
34.0 ± 1.0 |
42.1 ± 2.0 |
82.5 ± 1.8 |
2.71 ± 0.10 |
1.12 ± 0.03 |
| MX1 |
65.2 ± 1.8 |
56.1 ± 2.2 |
58.5 ± 2.8 |
69.3 ± 1.0 |
1.16 ± 0.04 |
0.94 ± 0.02 |
| MX2 |
67.9 ± 1.6 |
54.8 ± 2.1 |
58.0 ± 2.8 |
70.3 ± 1.1 |
1.24 ± 0.04 |
0.97 ± 0.02 |
| MX3 |
68.4 ± 1.6 |
52.2 ± 1.8 |
56.8 ± 2.7 |
72.3 ± 1.3 |
1.31 ± 0.04 |
0.95 ± 0.02 |
| RH8 |
52.7 ± 1.3 |
53.3 ± 1.9 |
57.3 ± 2.7 |
71.5 ± 1.2 |
0.99 ± 0.03 |
0.74 ± 0.01 |
| RH9 |
52.1 ± 1.3 |
53.0 ± 1.9 |
57.2 ± 2.7 |
71.7 ± 1.2 |
0.98 ± 0.03 |
0.73 ± 0.01 |
| RH10 |
52.1 ± 1.3 |
53.0 ± 1.9 |
57.2 ± 2.7 |
71.7 ± 1.2 |
0.98 ± 0.03 |
0.73 ± 0.01 |
| Average |
64.3 |
51.6 |
55.7 |
72.3 |
1.3 |
0.9 |
| Median |
65.2 |
53.3 |
57.3 |
71.7 |
1.2 |
0.9 |
| Deviation |
13.3 |
7.3 |
5.5 |
4.2 |
0.6 |
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)
| 
