Database: Ace Shock Analysis
Event ID: 19980631058
Observation time: 03/04/1998 63.45699 1058 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
63.456991 |
| Arrival time of shock [seconds of day] |
39484.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
0.000 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0041 |
| Downstream plasma points selected for analysis |
0009
|
| Downstream field points selected for analysis |
0041 |
| Minimum chisq/dof for RH8,RH9,RH10 |
7.99, 11.93, 12.11 |
Event added to database
|
Sat Apr 30 21:41:57 2005
|
Event last processed
|
Wed Oct 15 14:11:26 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.010 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-351.5 ± 1.2 |
-382.3 ± 3.7 |
| Vy GSE [km/s] |
10.0 ± 1.4 |
11.4 ± 5.2 |
| Vz GSE [km/s] |
-21.1 ± 2.0 |
-33.6 ± 1.7 |
| Wi [km/s] |
24.4 ± 1.4 |
29.2 ± 1.3 |
| We [km/s] |
771.2 ± 43.8 |
923.5 ± 41.0 |
| Ni [n/cc] |
4.4 ± 0.2 |
8.3 ± 0.5 |
| Bx GSE [nT] |
1.3 ± 0.2 |
2.6 ± 0.5 |
| By GSE [nT] |
0.2 ± 0.2 |
-0.1 ± 0.6 |
| Bz GSE [nT] |
-2.8 ± 0.1 |
-5.0 ± 0.3 |
Plasma Beta
|
0.571 ± 0.562
|
0.458 ± 0.477
|
Sound Speed [km/s]
|
31.48 ± 1.79
|
37.70 ± 1.68
|
Alfven Speed [km/s]
|
32.49 ± 1.76
|
43.30 ± 1.78
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.906 ± 0.319 |
0.301 ± 0.918 |
-0.297 ± 0.288 |
-17.26 ± 19.19 |
161.60 ± 58.00 |
| VC |
-0.928 ± 0.024 |
0.038 ± 0.151 |
-0.372 ± 0.353 |
-21.82 ± 3.51 |
177.67 ± 9.30 |
| MX1 |
-0.890 ± 0.105 |
0.038 ± 0.143 |
-0.454 ± 0.420 |
-26.99 ± 13.30 |
177.53 ± 9.22 |
| MX2 |
-0.895 ± 0.096 |
0.014 ± 0.179 |
-0.446 ± 0.414 |
-26.51 ± 12.29 |
179.12 ± 11.45 |
| MX3 |
-0.900 ± 0.083 |
-0.009 ± 0.221 |
-0.436 ± 0.406 |
-25.85 ± 10.91 |
180.57 ± 14.05 |
| RH08 |
-0.981 ± 0.002 |
-0.009 ± 0.013 |
-0.196 ± 0.193 |
-11.28 ± 0.65 |
180.50 ± 0.78 |
| RH09 |
-0.985 ± 0.012 |
-0.026 ± 0.070 |
-0.173 ± 0.171 |
-9.97 ± 4.03 |
181.50 ± 4.10 |
| RH10 |
-0.986 ± 0.012 |
-0.026 ± 0.070 |
-0.162 ± 0.161 |
-9.32 ± 4.03 |
181.50 ± 4.07 |
| Average |
-0.934 |
0.040 |
-0.317 |
-18.626 |
177.501 |
| Median |
-0.906 |
0.014 |
-0.297 |
-17.261 |
180.501 |
| Deviation |
0.043 |
0.109 |
0.127 |
7.671 |
6.611 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
84.8 ± 3.5 |
398.5 ± 1.4 |
1.87 ± 0.15 |
| VC |
87.2 ± 3.1 |
407.5 ± 1.3 |
1.87 ± 0.15 |
| MX1 |
87.6 ± 3.1 |
395.8 ± 1.3 |
1.87 ± 0.15 |
| MX2 |
88.2 ± 3.0 |
396.9 ± 1.3 |
1.87 ± 0.15 |
| MX3 |
88.9 ± 3.0 |
398.6 ± 1.3 |
1.87 ± 0.15 |
| RH08 |
76.5 ± 3.0 |
420.4 ± 1.2 |
1.87 ± 0.15 |
| RH09 |
75.2 ± 3.0 |
420.9 ± 1.2 |
1.87 ± 0.15 |
| RH10 |
74.5 ± 3.0 |
421.2 ± 11.6 |
1.87 ± 0.15 |
| Average |
82.9 |
407.5 |
1.87 |
| Median |
87.2 |
407.5 |
1.87 |
| Deviation |
6.3 |
11.6 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
70.8 ± 1.9 |
2.0 ± 0.1 |
2.9 ± 0.2 |
45.2 ± 1.6 |
34.85 ± 0.76 |
1.57 ± 0.04 |
| VC |
73.3 ± 1.7 |
1.1 ± 0.0 |
1.6 ± 0.1 |
45.3 ± 1.7 |
67.04 ± 1.52 |
1.62 ± 0.04 |
| MX1 |
73.0 ± 1.8 |
0.9 ± 0.0 |
1.4 ± 0.1 |
45.3 ± 1.7 |
77.71 ± 1.78 |
1.61 ± 0.04 |
| MX2 |
72.9 ± 1.8 |
0.7 ± 0.0 |
1.0 ± 0.1 |
45.3 ± 1.7 |
103.12 ± 2.37 |
1.61 ± 0.04 |
| MX3 |
73.2 ± 1.8 |
0.4 ± 0.0 |
0.6 ± 0.0 |
45.3 ± 1.7 |
177.02 ± 4.09 |
1.62 ± 0.04 |
| RH8 |
71.6 ± 1.5 |
5.3 ± 0.2 |
7.6 ± 0.4 |
45.0 ± 1.6 |
13.54 ± 0.31 |
1.59 ± 0.04 |
| RH9 |
71.5 ± 1.4 |
5.8 ± 0.2 |
8.3 ± 0.5 |
44.9 ± 1.6 |
12.28 ± 0.29 |
1.59 ± 0.04 |
| RH10 |
71.3 ± 1.4 |
6.1 ± 0.2 |
8.7 ± 0.5 |
44.9 ± 1.6 |
11.74 ± 0.27 |
1.59 ± 0.04 |
| Average |
72.2 |
2.8 |
4.0 |
45.1 |
62.2 |
1.6 |
| Median |
72.9 |
2.0 |
2.9 |
45.3 |
67.0 |
1.6 |
| Deviation |
1.0 |
2.5 |
3.5 |
0.2 |
57.7 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
38.7 ± 4.3 |
2.6 ± 0.1 |
3.9 ± 0.2 |
57.4 ± 1.5 |
15.13 ± 1.61 |
0.67 ± 0.08 |
| VC |
40.0 ± 3.8 |
1.4 ± 0.0 |
2.1 ± 0.1 |
57.4 ± 1.5 |
29.04 ± 2.58 |
0.70 ± 0.07 |
| MX1 |
39.8 ± 3.8 |
1.2 ± 0.0 |
1.8 ± 0.1 |
57.4 ± 1.5 |
33.66 ± 2.99 |
0.69 ± 0.07 |
| MX2 |
39.7 ± 3.8 |
0.9 ± 0.0 |
1.4 ± 0.1 |
57.4 ± 1.5 |
44.62 ± 3.92 |
0.69 ± 0.06 |
| MX3 |
40.1 ± 3.7 |
0.5 ± 0.0 |
0.8 ± 0.0 |
57.4 ± 1.5 |
76.88 ± 6.62 |
0.70 ± 0.06 |
| RH8 |
39.0 ± 3.8 |
6.7 ± 0.2 |
10.1 ± 0.4 |
57.1 ± 1.5 |
5.85 ± 0.51 |
0.68 ± 0.06 |
| RH9 |
39.0 ± 3.8 |
7.3 ± 0.2 |
11.1 ± 0.5 |
57.0 ± 1.5 |
5.32 ± 0.46 |
0.68 ± 0.06 |
| RH10 |
38.9 ± 3.8 |
7.6 ± 0.2 |
11.6 ± 0.5 |
56.9 ± 1.5 |
5.09 ± 0.44 |
0.68 ± 0.06 |
| Average |
39.4 |
3.5 |
5.3 |
57.3 |
27.0 |
0.7 |
| Median |
39.7 |
2.6 |
3.9 |
57.4 |
29.0 |
0.7 |
| Deviation |
0.5 |
3.1 |
4.7 |
0.2 |
25.0 |
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)
| 
