Database: Ace Shock Analysis
Event ID: 19982220006
Observation time: 08/10/1998 222.00456 0006 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
222.004560 |
| Arrival time of shock [seconds of day] |
394.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.038 |
| Y GSE location of spacecraft [Re] |
0.004 |
| Z GSE location of spacecraft [Re] |
0.003 |
| Upstream plasma points selected for analysis |
0008 |
| Upstream field points selected for analysis |
0037 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0041 |
| Minimum chisq/dof for RH8,RH9,RH10 |
21.98, 28.24, 33.98 |
Event added to database
|
Sat Apr 30 21:42:55 2005
|
Event last processed
|
Wed Oct 15 14:34:16 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.004 ± 0.003
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-402.9 ± 1.6 |
-432.0 ± 5.6 |
| Vy GSE [km/s] |
8.6 ± 4.2 |
-10.8 ± 5.1 |
| Vz GSE [km/s] |
-1.0 ± 7.7 |
64.4 ± 1.8 |
| Wi [km/s] |
26.8 ± 1.6 |
38.5 ± 6.8 |
| We [km/s] |
849.1 ± 49.5 |
1218.6 ± 214.0 |
| Ni [n/cc] |
4.8 ± 0.6 |
9.7 ± 0.8 |
| Bx GSE [nT] |
-4.5 ± 0.1 |
-8.8 ± 0.8 |
| By GSE [nT] |
1.4 ± 0.1 |
5.2 ± 1.3 |
| Bz GSE [nT] |
1.2 ± 0.1 |
-0.0 ± 0.8 |
Plasma Beta
|
0.308 ± 0.322
|
0.312 ± 0.310
|
Sound Speed [km/s]
|
34.64 ± 2.03
|
51.57 ± 7.65
|
Alfven Speed [km/s]
|
48.71 ± 3.15
|
72.53 ± 4.89
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.623 ± 0.219 |
-0.296 ± 0.174 |
0.724 ± 0.558 |
46.35 ± 18.26 |
205.43 ± 13.10 |
| VC |
-0.399 ± 0.078 |
-0.264 ± 0.082 |
0.878 ± 0.513 |
61.41 ± 4.90 |
213.47 ± 10.13 |
| MX1 |
-0.444 ± 0.077 |
-0.233 ± 0.075 |
0.865 ± 0.524 |
59.90 ± 5.13 |
207.74 ± 8.47 |
| MX2 |
-0.441 ± 0.074 |
-0.229 ± 0.076 |
0.868 ± 0.522 |
60.25 ± 4.82 |
207.42 ± 8.87 |
| MX3 |
-0.438 ± 0.074 |
-0.225 ± 0.078 |
0.870 ± 0.520 |
60.47 ± 4.77 |
207.17 ± 9.22 |
| RH08 |
-0.394 ± 0.018 |
-0.189 ± 0.015 |
0.899 ± 0.489 |
64.08 ± 1.16 |
205.57 ± 1.86 |
| RH09 |
0.005 ± 0.062 |
0.388 ± 0.062 |
0.922 ± 0.455 |
67.19 ± 3.83 |
89.25 ± 9.19 |
| RH10 |
-0.659 ± 0.053 |
-0.723 ± 0.049 |
0.207 ± 0.204 |
11.93 ± 3.97 |
227.63 ± 4.16 |
| Average |
-0.424 |
-0.221 |
0.779 |
53.947 |
195.460 |
| Median |
-0.438 |
-0.229 |
0.870 |
60.473 |
207.417 |
| Deviation |
0.201 |
0.300 |
0.239 |
18.027 |
43.545 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
48.4 ± 1.3 |
390.8 ± 22.4 |
2.04 ± 0.38 |
| VC |
59.8 ± 1.3 |
307.0 ± 23.3 |
2.04 ± 0.38 |
| MX1 |
56.6 ± 1.3 |
324.9 ± 23.2 |
2.04 ± 0.38 |
| MX2 |
56.7 ± 1.3 |
323.6 ± 23.2 |
2.04 ± 0.38 |
| MX3 |
56.7 ± 1.3 |
322.7 ± 23.2 |
2.04 ± 0.38 |
| RH08 |
58.3 ± 1.4 |
305.2 ± 23.2 |
2.04 ± 0.38 |
| RH09 |
70.6 ± 2.7 |
104.9 ± 18.0 |
2.04 ± 0.38 |
| RH10 |
63.5 ± 2.6 |
354.0 ± 16.8 |
2.04 ± 0.38 |
| Average |
58.8 |
304.1 |
2.04 |
| Median |
58.3 |
323.6 |
2.04 |
| Deviation |
6.4 |
85.3 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
143.0 ± 5.9 |
19.8 ± 1.0 |
32.3 ± 2.1 |
56.4 ± 2.9 |
7.23 ± 0.51 |
2.54 ± 0.15 |
| VC |
149.4 ± 7.1 |
14.6 ± 0.7 |
24.5 ± 1.6 |
58.0 ± 2.9 |
10.24 ± 0.75 |
2.58 ± 0.17 |
| MX1 |
148.9 ± 6.9 |
16.1 ± 0.8 |
26.8 ± 1.7 |
57.6 ± 2.9 |
9.27 ± 0.68 |
2.59 ± 0.17 |
| MX2 |
148.9 ± 6.9 |
16.1 ± 0.8 |
26.8 ± 1.7 |
57.6 ± 2.9 |
9.29 ± 0.69 |
2.59 ± 0.17 |
| MX3 |
149.0 ± 6.9 |
16.1 ± 0.8 |
26.7 ± 1.7 |
57.6 ± 2.9 |
9.30 ± 0.69 |
2.59 ± 0.17 |
| RH8 |
149.0 ± 7.1 |
15.3 ± 0.8 |
25.6 ± 1.7 |
57.8 ± 2.9 |
9.74 ± 0.73 |
2.58 ± 0.17 |
| RH9 |
104.6 ± 6.7 |
9.5 ± 0.5 |
16.2 ± 1.0 |
59.1 ± 2.9 |
11.07 ± 1.06 |
1.78 ± 0.16 |
| RH10 |
94.7 ± 3.9 |
12.9 ± 0.6 |
21.8 ± 1.4 |
58.4 ± 2.9 |
7.36 ± 0.37 |
1.62 ± 0.07 |
| Average |
135.9 |
15.1 |
25.1 |
57.8 |
9.2 |
2.4 |
| Median |
148.9 |
16.1 |
26.7 |
57.8 |
9.3 |
2.6 |
| Deviation |
22.6 |
3.0 |
4.7 |
0.8 |
1.3 |
0.4 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
71.7 ± 3.2 |
29.3 ± 3.1 |
48.1 ± 3.2 |
84.2 ± 5.7 |
2.47 ± 0.28 |
0.85 ± 0.07 |
| VC |
75.3 ± 1.9 |
21.7 ± 2.3 |
36.5 ± 2.5 |
86.5 ± 5.9 |
3.51 ± 0.34 |
0.87 ± 0.06 |
| MX1 |
75.0 ± 2.0 |
23.9 ± 2.5 |
39.9 ± 2.7 |
85.9 ± 5.9 |
3.17 ± 0.32 |
0.88 ± 0.06 |
| MX2 |
75.0 ± 2.0 |
23.8 ± 2.5 |
39.9 ± 2.7 |
86.0 ± 5.9 |
3.18 ± 0.32 |
0.88 ± 0.06 |
| MX3 |
75.0 ± 2.0 |
23.8 ± 2.5 |
39.8 ± 2.7 |
86.0 ± 5.9 |
3.18 ± 0.32 |
0.88 ± 0.06 |
| RH8 |
75.1 ± 1.7 |
22.7 ± 2.4 |
38.2 ± 2.6 |
86.3 ± 5.9 |
3.33 ± 0.33 |
0.87 ± 0.06 |
| RH9 |
52.3 ± 3.0 |
14.0 ± 1.4 |
24.1 ± 1.6 |
88.1 ± 6.1 |
3.75 ± 0.46 |
0.60 ± 0.05 |
| RH10 |
47.8 ± 5.2 |
19.1 ± 2.0 |
32.4 ± 2.2 |
87.1 ± 6.0 |
2.52 ± 0.35 |
0.55 ± 0.07 |
| Average |
68.4 |
22.3 |
37.4 |
86.3 |
3.1 |
0.8 |
| Median |
75.0 |
23.8 |
39.8 |
86.3 |
3.2 |
0.9 |
| Deviation |
11.5 |
4.4 |
6.9 |
1.1 |
0.4 |
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)
| 
