Database: Ace Shock Analysis
Event ID: 19981212122
Observation time: 05/01/1998 121.89061 2122 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
121.890613 |
| Arrival time of shock [seconds of day] |
76949.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.036 |
| Y GSE location of spacecraft [Re] |
-0.005 |
| Z GSE location of spacecraft [Re] |
-0.002 |
| Upstream plasma points selected for analysis |
0007 |
| Upstream field points selected for analysis |
0029 |
| Downstream plasma points selected for analysis |
0007
|
| Downstream field points selected for analysis |
0033 |
| Minimum chisq/dof for RH8,RH9,RH10 |
16.30, 19.78, 21.09 |
Event added to database
|
Sat Apr 30 21:42:19 2005
|
Event last processed
|
Wed Oct 15 14:19:37 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.005 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-496.2 ± 1.3 |
-566.0 ± 4.9 |
| Vy GSE [km/s] |
18.7 ± 3.9 |
-43.2 ± 7.3 |
| Vz GSE [km/s] |
-35.6 ± 2.8 |
-61.6 ± 4.8 |
| Wi [km/s] |
33.9 ± 1.2 |
56.8 ± 3.8 |
| We [km/s] |
1072.3 ± 38.8 |
1794.7 ± 118.9 |
| Ni [n/cc] |
5.3 ± 0.3 |
15.4 ± 1.4 |
| Bx GSE [nT] |
1.7 ± 1.0 |
-5.7 ± 1.4 |
| By GSE [nT] |
-0.6 ± 0.5 |
7.8 ± 1.9 |
| Bz GSE [nT] |
5.2 ± 0.4 |
11.1 ± 1.7 |
Plasma Beta
|
0.420 ± 0.422
|
0.542 ± 0.485
|
Sound Speed [km/s]
|
43.81 ± 1.57
|
75.17 ± 6.88
|
Alfven Speed [km/s]
|
52.46 ± 1.87
|
81.92 ± 8.24
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.440 ± 0.123 |
0.248 ± 0.092 |
-0.863 ± 0.526 |
-59.64 ± 8.95 |
150.59 ± 8.34 |
| VC |
-0.722 ± 0.042 |
-0.636 ± 0.047 |
-0.272 ± 0.265 |
-15.76 ± 3.38 |
221.38 ± 3.66 |
| MX1 |
-0.827 ± 0.333 |
-0.555 ± 0.492 |
-0.088 ± 0.088 |
-5.08 ± 40.64 |
213.86 ± 34.00 |
| MX2 |
-0.801 ± 0.051 |
-0.574 ± 0.069 |
-0.169 ± 0.167 |
-9.72 ± 6.62 |
215.61 ± 4.88 |
| MX3 |
-0.808 ± 0.059 |
-0.551 ± 0.084 |
-0.209 ± 0.206 |
-12.08 ± 4.91 |
214.32 ± 5.94 |
| RH08 |
-0.767 ± 0.008 |
-0.635 ± 0.010 |
-0.095 ± 0.095 |
-5.45 ± 0.93 |
219.61 ± 0.76 |
| RH09 |
-0.764 ± 0.045 |
-0.632 ± 0.055 |
-0.128 ± 0.128 |
-7.38 ± 4.01 |
219.61 ± 4.07 |
| RH10 |
-0.765 ± 0.045 |
-0.633 ± 0.055 |
-0.117 ± 0.117 |
-6.74 ± 4.01 |
219.61 ± 4.07 |
| Average |
-0.737 |
-0.496 |
-0.243 |
-15.229 |
209.323 |
| Median |
-0.765 |
-0.574 |
-0.128 |
-7.382 |
219.610 |
| Deviation |
0.124 |
0.303 |
0.258 |
18.305 |
23.897 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
12.5 ± 6.5 |
314.1 ± 1.2 |
2.93 ± 0.29 |
| VC |
66.5 ± 2.5 |
504.6 ± 1.1 |
2.93 ± 0.29 |
| MX1 |
74.5 ± 3.0 |
547.3 ± 1.1 |
2.93 ± 0.29 |
| MX2 |
70.5 ± 2.8 |
540.1 ± 1.1 |
2.93 ± 0.29 |
| MX3 |
67.9 ± 2.9 |
545.0 ± 1.1 |
2.93 ± 0.29 |
| RH08 |
75.7 ± 2.7 |
518.4 ± 1.1 |
2.93 ± 0.29 |
| RH09 |
73.9 ± 2.7 |
518.9 ± 1.1 |
2.93 ± 0.29 |
| RH10 |
74.5 ± 2.7 |
518.8 ± 7.9 |
2.93 ± 0.29 |
| Average |
64.5 |
500.9 |
2.93 |
| Median |
73.9 |
518.9 |
2.93 |
| Deviation |
21.3 |
77.0 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
60.6 ± 3.2 |
41.0 ± 1.3 |
51.2 ± 1.8 |
54.7 ± 1.7 |
1.48 ± 0.10 |
1.11 ± 0.05 |
| VC |
148.5 ± 2.0 |
13.7 ± 0.4 |
20.9 ± 0.7 |
67.0 ± 1.9 |
10.85 ± 0.39 |
2.22 ± 0.08 |
| MX1 |
144.1 ± 1.8 |
9.1 ± 0.3 |
14.0 ± 0.5 |
67.8 ± 1.9 |
15.90 ± 0.56 |
2.13 ± 0.08 |
| MX2 |
147.2 ± 1.8 |
11.4 ± 0.3 |
17.5 ± 0.6 |
67.4 ± 1.9 |
12.97 ± 0.46 |
2.19 ± 0.08 |
| MX3 |
147.1 ± 1.8 |
12.9 ± 0.4 |
19.7 ± 0.7 |
67.1 ± 1.9 |
11.45 ± 0.40 |
2.19 ± 0.08 |
| RH8 |
146.4 ± 2.0 |
8.3 ± 0.2 |
12.9 ± 0.5 |
67.8 ± 1.9 |
17.54 ± 0.64 |
2.16 ± 0.08 |
| RH9 |
147.1 ± 2.0 |
9.4 ± 0.3 |
14.6 ± 0.5 |
67.7 ± 1.9 |
15.63 ± 0.57 |
2.17 ± 0.08 |
| RH10 |
146.8 ± 2.0 |
9.1 ± 0.3 |
14.0 ± 0.5 |
67.8 ± 1.9 |
16.22 ± 0.59 |
2.17 ± 0.08 |
| Average |
136.0 |
14.4 |
20.6 |
65.9 |
12.8 |
2.0 |
| Median |
147.1 |
11.4 |
17.5 |
67.7 |
15.6 |
2.2 |
| Deviation |
30.5 |
11.0 |
12.7 |
4.6 |
5.1 |
0.4 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
21.3 ± 6.4 |
66.9 ± 3.6 |
80.0 ± 8.0 |
89.2 ± 2.9 |
0.32 ± 0.09 |
0.24 ± 0.07 |
| VC |
51.3 ± 6.1 |
22.3 ± 0.9 |
32.7 ± 3.3 |
109.3 ± 3.4 |
2.30 ± 0.20 |
0.47 ± 0.04 |
| MX1 |
49.6 ± 6.0 |
14.8 ± 0.6 |
21.9 ± 2.2 |
110.6 ± 3.4 |
3.35 ± 0.32 |
0.45 ± 0.04 |
| MX2 |
51.1 ± 6.0 |
18.5 ± 0.7 |
27.3 ± 2.7 |
110.0 ± 3.4 |
2.76 ± 0.25 |
0.46 ± 0.04 |
| MX3 |
50.9 ± 5.9 |
21.0 ± 0.8 |
30.8 ± 3.1 |
109.6 ± 3.4 |
2.43 ± 0.21 |
0.46 ± 0.04 |
| RH8 |
51.0 ± 6.2 |
13.6 ± 0.5 |
20.2 ± 2.0 |
110.8 ± 3.5 |
3.74 ± 0.36 |
0.46 ± 0.05 |
| RH9 |
51.2 ± 6.2 |
15.4 ± 0.6 |
22.7 ± 2.3 |
110.5 ± 3.4 |
3.33 ± 0.31 |
0.46 ± 0.04 |
| RH10 |
51.1 ± 6.2 |
14.8 ± 0.6 |
21.9 ± 2.2 |
110.6 ± 3.4 |
3.45 ± 0.33 |
0.46 ± 0.05 |
| Average |
47.2 |
23.4 |
32.2 |
107.6 |
2.7 |
0.4 |
| Median |
51.1 |
18.5 |
27.3 |
110.5 |
3.3 |
0.5 |
| Deviation |
10.5 |
17.9 |
19.8 |
7.4 |
1.1 |
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)
| 
