Database: Ace Shock Analysis
Event ID: 19981231700
Observation time: 05/03/1998 123.70856 1700 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
123.708565 |
| Arrival time of shock [seconds of day] |
61220.0 ± 30.0 |
| 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] |
-0.003 |
| Upstream plasma points selected for analysis |
0010 |
| Upstream field points selected for analysis |
0039 |
| Downstream plasma points selected for analysis |
0007
|
| Downstream field points selected for analysis |
0027 |
| Minimum chisq/dof for RH8,RH9,RH10 |
6.61, 10.74, 10.95 |
Event added to database
|
Sat Apr 30 21:42:23 2005
|
Event last processed
|
Wed Oct 15 14:19:53 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.007 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-429.1 ± 1.6 |
-481.5 ± 4.5 |
| Vy GSE [km/s] |
1.1 ± 2.8 |
22.2 ± 4.6 |
| Vz GSE [km/s] |
11.7 ± 6.4 |
-21.9 ± 5.5 |
| Wi [km/s] |
12.1 ± 1.4 |
28.6 ± 1.6 |
| We [km/s] |
381.2 ± 45.3 |
903.8 ± 49.4 |
| Ni [n/cc] |
4.2 ± 0.9 |
12.8 ± 0.9 |
| Bx GSE [nT] |
2.5 ± 0.2 |
3.5 ± 0.2 |
| By GSE [nT] |
-2.2 ± 0.2 |
-3.4 ± 0.2 |
| Bz GSE [nT] |
-1.2 ± 0.2 |
-6.3 ± 0.3 |
Plasma Beta
|
0.114 ± 0.097
|
0.356 ± 0.358
|
Sound Speed [km/s]
|
15.56 ± 1.85
|
36.50 ± 1.74
|
Alfven Speed [km/s]
|
37.16 ± 5.16
|
47.57 ± 2.21
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.750 ± 0.080 |
0.607 ± 0.098 |
-0.263 ± 0.256 |
-15.23 ± 3.06 |
141.03 ± 7.44 |
| VC |
-0.800 ± 0.058 |
0.323 ± 0.076 |
-0.505 ± 0.457 |
-30.34 ± 6.06 |
158.04 ± 5.23 |
| MX1 |
-0.854 ± 0.045 |
0.455 ± 0.082 |
-0.254 ± 0.248 |
-14.71 ± 3.08 |
151.94 ± 5.46 |
| MX2 |
-0.873 ± 0.040 |
0.419 ± 0.079 |
-0.250 ± 0.245 |
-14.48 ± 3.12 |
154.38 ± 5.16 |
| MX3 |
-0.883 ± 0.038 |
0.399 ± 0.079 |
-0.248 ± 0.243 |
-14.35 ± 3.14 |
155.65 ± 5.14 |
| RH08 |
-0.983 ± 0.002 |
0.060 ± 0.018 |
-0.173 ± 0.171 |
-9.97 ± 0.36 |
176.49 ± 1.05 |
| RH09 |
-0.989 ± 0.008 |
-0.009 ± 0.073 |
-0.151 ± 0.150 |
-8.68 ± 3.12 |
180.50 ± 4.26 |
| RH10 |
-0.989 ± 0.008 |
-0.009 ± 0.073 |
-0.151 ± 0.150 |
-8.68 ± 3.20 |
180.50 ± 4.23 |
| Average |
-0.890 |
0.281 |
-0.249 |
-14.554 |
162.317 |
| Median |
-0.873 |
0.399 |
-0.248 |
-14.351 |
158.043 |
| Deviation |
0.090 |
0.235 |
0.114 |
6.967 |
14.874 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
35.2 ± 2.3 |
410.5 ± 12.7 |
3.28 ± 0.74 |
| VC |
53.8 ± 2.5 |
436.6 ± 14.0 |
3.28 ± 0.74 |
| MX1 |
37.3 ± 2.5 |
457.1 ± 13.1 |
3.28 ± 0.74 |
| MX2 |
38.1 ± 2.6 |
465.6 ± 13.2 |
3.28 ± 0.74 |
| MX3 |
38.5 ± 2.6 |
469.7 ± 13.2 |
3.28 ± 0.74 |
| RH08 |
48.6 ± 3.0 |
507.0 ± 12.9 |
3.28 ± 0.74 |
| RH09 |
51.0 ± 3.0 |
507.4 ± 12.7 |
3.28 ± 0.74 |
| RH10 |
51.0 ± 3.0 |
507.4 ± 12.7 |
3.28 ± 0.74 |
| Average |
44.2 |
470.2 |
3.28 |
| Median |
48.6 |
469.7 |
3.28 |
| Deviation |
7.6 |
35.9 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
91.1 ± 2.4 |
12.3 ± 1.3 |
30.4 ± 4.2 |
38.4 ± 4.9 |
7.50 ± 0.84 |
2.40 ± 0.28 |
| VC |
98.7 ± 3.4 |
8.6 ± 0.8 |
21.9 ± 3.0 |
39.4 ± 4.7 |
11.56 ± 1.25 |
2.53 ± 0.30 |
| MX1 |
93.4 ± 2.2 |
11.9 ± 1.2 |
29.6 ± 4.1 |
38.6 ± 4.8 |
7.92 ± 0.87 |
2.45 ± 0.29 |
| MX2 |
93.5 ± 2.2 |
11.8 ± 1.2 |
29.3 ± 4.1 |
38.6 ± 4.8 |
8.03 ± 0.87 |
2.45 ± 0.29 |
| MX3 |
93.5 ± 2.1 |
11.7 ± 1.2 |
29.1 ± 4.0 |
38.6 ± 4.8 |
8.08 ± 0.88 |
2.45 ± 0.29 |
| RH8 |
87.2 ± 1.8 |
9.7 ± 0.9 |
24.6 ± 3.4 |
39.2 ± 4.7 |
9.04 ± 0.93 |
2.25 ± 0.27 |
| RH9 |
85.0 ± 1.8 |
9.2 ± 0.9 |
23.4 ± 3.2 |
39.3 ± 4.7 |
9.30 ± 0.95 |
2.19 ± 0.26 |
| RH10 |
85.0 ± 1.8 |
9.2 ± 0.9 |
23.4 ± 3.2 |
39.3 ± 4.7 |
9.30 ± 0.95 |
2.19 ± 0.26 |
| Average |
90.9 |
10.5 |
26.4 |
38.9 |
8.8 |
2.4 |
| Median |
93.4 |
11.7 |
29.1 |
39.2 |
9.0 |
2.5 |
| Deviation |
4.8 |
1.5 |
3.4 |
0.4 |
1.3 |
0.1 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
30.2 ± 5.8 |
26.3 ± 0.9 |
38.9 ± 1.8 |
53.9 ± 1.8 |
1.14 ± 0.20 |
0.56 ± 0.10 |
| VC |
32.8 ± 6.0 |
17.9 ± 0.6 |
28.1 ± 1.3 |
57.3 ± 1.9 |
1.83 ± 0.31 |
0.57 ± 0.10 |
| MX1 |
30.6 ± 5.6 |
25.4 ± 0.9 |
37.8 ± 1.8 |
54.3 ± 1.8 |
1.20 ± 0.20 |
0.56 ± 0.10 |
| MX2 |
30.6 ± 5.5 |
25.1 ± 0.9 |
37.5 ± 1.7 |
54.5 ± 1.8 |
1.22 ± 0.20 |
0.56 ± 0.10 |
| MX3 |
30.5 ± 5.5 |
24.9 ± 0.9 |
37.2 ± 1.7 |
54.6 ± 1.8 |
1.23 ± 0.20 |
0.56 ± 0.10 |
| RH8 |
28.7 ± 5.1 |
20.3 ± 0.7 |
31.5 ± 1.5 |
56.4 ± 1.9 |
1.41 ± 0.24 |
0.51 ± 0.09 |
| RH9 |
28.5 ± 5.0 |
19.2 ± 0.6 |
29.9 ± 1.4 |
56.8 ± 1.9 |
1.49 ± 0.25 |
0.50 ± 0.09 |
| RH10 |
28.5 ± 5.0 |
19.2 ± 0.6 |
29.9 ± 1.4 |
56.8 ± 1.9 |
1.49 ± 0.25 |
0.50 ± 0.09 |
| Average |
30.1 |
22.3 |
33.8 |
55.6 |
1.4 |
0.5 |
| Median |
30.5 |
24.9 |
37.2 |
56.4 |
1.4 |
0.6 |
| Deviation |
1.5 |
3.4 |
4.4 |
1.4 |
0.2 |
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)
| 
