Database: Ace Shock Analysis
Event ID: 19982271158
Observation time: 08/15/1998 227.49862 1158 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
227.498623 |
| Arrival time of shock [seconds of day] |
43081.0 ± 60.0 |
| Shock type |
SF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.039 |
| Y GSE location of spacecraft [Re] |
0.003 |
| Z GSE location of spacecraft [Re] |
0.004 |
| Upstream plasma points selected for analysis |
0012 |
| Upstream field points selected for analysis |
0046 |
| Downstream plasma points selected for analysis |
0012
|
| Downstream field points selected for analysis |
0047 |
| Minimum chisq/dof for RH8,RH9,RH10 |
5.74, 10.63, 10.87 |
Event added to database
|
Sat Apr 30 21:42:58 2005
|
Event last processed
|
Wed Oct 15 14:34:28 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] |
-373.5 ± 4.4 |
-410.0 ± 1.5 |
| Vy GSE [km/s] |
12.4 ± 2.8 |
29.6 ± 3.5 |
| Vz GSE [km/s] |
-22.9 ± 2.6 |
-8.8 ± 2.8 |
| Wi [km/s] |
38.8 ± 1.2 |
50.5 ± 0.9 |
| We [km/s] |
1227.2 ± 37.3 |
1595.7 ± 29.3 |
| Ni [n/cc] |
2.8 ± 0.2 |
5.6 ± 0.4 |
| Bx GSE [nT] |
4.3 ± 0.2 |
3.5 ± 0.4 |
| By GSE [nT] |
-3.2 ± 0.2 |
-0.0 ± 0.5 |
| Bz GSE [nT] |
-2.2 ± 0.2 |
-0.4 ± 0.7 |
Plasma Beta
|
0.265 ± 0.261
|
2.561 ± 2.522
|
Sound Speed [km/s]
|
50.09 ± 1.50
|
65.25 ± 1.19
|
Alfven Speed [km/s]
|
75.63 ± 2.61
|
32.41 ± 4.39
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.974 ± 0.037 |
-0.226 ± 0.159 |
0.013 ± 0.013 |
0.72 ± 12.44 |
193.08 ± 9.36 |
| VC |
-0.854 ± 0.050 |
0.403 ± 0.094 |
0.328 ± 0.316 |
19.14 ± 4.70 |
154.75 ± 6.29 |
| MX1 |
-0.959 ± 0.069 |
-0.282 ± 0.233 |
-0.025 ± 0.025 |
-1.44 ± 21.13 |
196.39 ± 13.93 |
| MX2 |
-0.975 ± 0.042 |
-0.222 ± 0.181 |
0.020 ± 0.020 |
1.15 ± 15.64 |
192.81 ± 10.66 |
| MX3 |
-0.968 ± 0.030 |
-0.250 ± 0.116 |
0.005 ± 0.005 |
0.30 ± 6.97 |
194.45 ± 6.86 |
| RH08 |
-0.961 ± 0.002 |
-0.231 ± 0.000 |
-0.151 ± 0.150 |
-8.68 ± 0.65 |
193.54 ± 0.00 |
| RH09 |
-0.936 ± 0.024 |
-0.278 ± 0.065 |
-0.218 ± 0.214 |
-12.58 ± 3.99 |
196.55 ± 3.96 |
| RH10 |
-0.936 ± 0.024 |
-0.278 ± 0.065 |
-0.218 ± 0.214 |
-12.58 ± 3.99 |
196.55 ± 3.98 |
| Average |
-0.945 |
-0.170 |
-0.031 |
-1.746 |
189.765 |
| Median |
-0.959 |
-0.231 |
0.005 |
0.299 |
194.452 |
| Deviation |
0.040 |
0.233 |
0.177 |
10.268 |
14.235 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
53.0 ± 3.1 |
424.0 ± 7.3 |
2.01 ± 0.23 |
| VC |
11.4 ± 3.2 |
402.2 ± 7.1 |
2.01 ± 0.23 |
| MX1 |
57.0 ± 3.1 |
414.4 ± 7.2 |
2.01 ± 0.23 |
| MX2 |
52.6 ± 3.1 |
424.7 ± 7.3 |
2.01 ± 0.23 |
| MX3 |
54.4 ± 3.1 |
420.2 ± 7.3 |
2.01 ± 0.23 |
| RH08 |
58.2 ± 3.1 |
417.1 ± 6.8 |
2.01 ± 0.23 |
| RH09 |
62.9 ± 3.1 |
403.6 ± 6.6 |
2.01 ± 0.23 |
| RH10 |
62.9 ± 3.1 |
403.6 ± 6.6 |
2.01 ± 0.23 |
| Average |
51.5 |
413.7 |
2.01 |
| Median |
57.0 |
417.1 |
2.01 |
| Deviation |
16.7 |
9.4 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
63.2 ± 4.4 |
26.2 ± 0.4 |
45.5 ± 1.6 |
86.9 ± 1.7 |
2.41 ± 0.20 |
0.73 ± 0.05 |
| VC |
85.7 ± 4.4 |
48.4 ± 1.3 |
74.1 ± 2.6 |
76.7 ± 2.4 |
1.77 ± 0.13 |
1.12 ± 0.04 |
| MX1 |
59.0 ± 4.3 |
23.5 ± 0.4 |
41.2 ± 1.4 |
87.6 ± 1.7 |
2.51 ± 0.21 |
0.67 ± 0.05 |
| MX2 |
63.7 ± 4.4 |
26.5 ± 0.4 |
45.9 ± 1.6 |
86.8 ± 1.7 |
2.41 ± 0.20 |
0.73 ± 0.05 |
| MX3 |
61.6 ± 4.4 |
25.3 ± 0.4 |
44.0 ± 1.5 |
87.2 ± 1.7 |
2.44 ± 0.20 |
0.71 ± 0.05 |
| RH8 |
57.4 ± 4.2 |
22.7 ± 0.4 |
39.8 ± 1.4 |
87.9 ± 1.7 |
2.53 ± 0.22 |
0.65 ± 0.05 |
| RH9 |
52.4 ± 4.1 |
19.5 ± 0.3 |
34.5 ± 1.2 |
88.6 ± 1.7 |
2.69 ± 0.24 |
0.59 ± 0.04 |
| RH10 |
52.4 ± 4.1 |
19.5 ± 0.3 |
34.5 ± 1.2 |
88.6 ± 1.7 |
2.69 ± 0.24 |
0.59 ± 0.04 |
| Average |
61.9 |
26.4 |
44.9 |
86.3 |
2.4 |
0.7 |
| Median |
61.6 |
25.3 |
44.0 |
87.6 |
2.5 |
0.7 |
| Deviation |
10.5 |
9.3 |
12.6 |
3.9 |
0.3 |
0.2 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
31.4 ± 1.7 |
18.0 ± 2.1 |
19.5 ± 2.6 |
70.7 ± 2.0 |
1.78 ± 0.25 |
0.44 ± 0.03 |
| VC |
42.9 ± 2.2 |
31.6 ± 4.2 |
31.8 ± 4.3 |
65.7 ± 1.2 |
1.38 ± 0.22 |
0.65 ± 0.04 |
| MX1 |
29.2 ± 1.8 |
16.2 ± 1.9 |
17.7 ± 2.4 |
71.1 ± 2.1 |
1.83 ± 0.26 |
0.41 ± 0.03 |
| MX2 |
31.7 ± 1.7 |
18.1 ± 2.1 |
19.7 ± 2.7 |
70.6 ± 2.0 |
1.77 ± 0.25 |
0.45 ± 0.03 |
| MX3 |
30.6 ± 1.8 |
17.3 ± 2.0 |
18.8 ± 2.6 |
70.8 ± 2.0 |
1.79 ± 0.25 |
0.43 ± 0.03 |
| RH8 |
28.5 ± 1.6 |
15.6 ± 1.8 |
17.1 ± 2.3 |
71.2 ± 2.1 |
1.85 ± 0.24 |
0.40 ± 0.02 |
| RH9 |
26.2 ± 1.7 |
13.4 ± 1.5 |
14.8 ± 2.0 |
71.7 ± 2.2 |
1.98 ± 0.25 |
0.37 ± 0.02 |
| RH10 |
26.2 ± 1.7 |
13.4 ± 1.5 |
14.8 ± 2.0 |
71.7 ± 2.2 |
1.98 ± 0.25 |
0.37 ± 0.02 |
| Average |
30.8 |
18.0 |
19.3 |
70.4 |
1.8 |
0.4 |
| Median |
30.6 |
17.3 |
18.8 |
71.1 |
1.8 |
0.4 |
| Deviation |
5.3 |
5.8 |
5.4 |
2.0 |
0.2 |
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)
| 
