Database: Ace Shock Analysis
Event ID: 19982750653
Observation time: 10/02/1998 275.28689 0653 [UT]
|
|
General
Information (About, Top)
| Year |
1998 |
| Fractional day of year |
275.286887 |
| Arrival time of shock [seconds of day] |
24787.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
| X GSE location of spacecraft [Re] |
0.037 |
| Y GSE location of spacecraft [Re] |
-0.006 |
| Z GSE location of spacecraft [Re] |
0.001 |
| Upstream plasma points selected for analysis |
0009 |
| Upstream field points selected for analysis |
0041 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0040 |
| Minimum chisq/dof for RH8,RH9,RH10 |
37.19, 43.29, 47.64 |
Event added to database
|
Sat Apr 30 21:43:08 2005
|
Event last processed
|
Wed Oct 15 14:40:12 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.004 ± 0.001
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-505.7 ± 13.0 |
-685.2 ± 14.6 |
| Vy GSE [km/s] |
5.4 ± 7.5 |
98.8 ± 7.6 |
| Vz GSE [km/s] |
15.1 ± 8.2 |
-14.5 ± 8.6 |
| Wi [km/s] |
55.4 ± 4.1 |
101.6 ± 4.8 |
| We [km/s] |
1751.2 ± 130.3 |
3212.1 ± 150.9 |
| Ni [n/cc] |
3.7 ± 0.5 |
7.9 ± 0.8 |
| Bx GSE [nT] |
2.2 ± 0.9 |
-4.6 ± 2.0 |
| By GSE [nT] |
-5.7 ± 0.5 |
-10.1 ± 0.7 |
| Bz GSE [nT] |
-1.5 ± 0.7 |
-9.9 ± 1.8 |
Plasma Beta
|
0.605 ± 0.657
|
0.816 ± 0.836
|
Sound Speed [km/s]
|
71.52 ± 5.34
|
131.15 ± 6.06
|
Alfven Speed [km/s]
|
72.25 ± 6.46
|
116.13 ± 16.19
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.548 ± 0.120 |
0.836 ± 0.079 |
0.035 ± 0.035 |
2.02 ± 7.53 |
123.28 ± 8.23 |
| VC |
-0.879 ± 0.031 |
0.454 ± 0.058 |
-0.145 ± 0.144 |
-8.34 ± 3.00 |
152.67 ± 3.80 |
| MX1 |
-0.614 ± 0.079 |
0.783 ± 0.062 |
0.098 ± 0.098 |
5.62 ± 4.93 |
128.08 ± 5.79 |
| MX2 |
-0.668 ± 0.059 |
0.726 ± 0.054 |
0.165 ± 0.163 |
9.48 ± 4.81 |
132.61 ± 4.58 |
| MX3 |
-0.688 ± 0.057 |
0.700 ± 0.056 |
0.192 ± 0.189 |
11.04 ± 4.98 |
134.51 ± 4.60 |
| RH08 |
-0.573 ± 0.015 |
0.698 ± 0.013 |
0.430 ± 0.401 |
25.48 ± 0.93 |
129.36 ± 1.20 |
| RH09 |
-0.587 ± 0.055 |
0.621 ± 0.053 |
0.520 ± 0.467 |
31.30 ± 3.74 |
133.37 ± 4.60 |
| RH10 |
-0.603 ± 0.056 |
0.595 ± 0.057 |
0.531 ± 0.474 |
32.05 ± 4.00 |
135.38 ± 4.77 |
| Average |
-0.645 |
0.677 |
0.228 |
13.582 |
133.656 |
| Median |
-0.603 |
0.700 |
0.192 |
11.044 |
133.370 |
| Deviation |
0.105 |
0.119 |
0.244 |
14.627 |
8.648 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
19.1 ± 7.1 |
618.0 ± 7.6 |
2.18 ± 0.36 |
| VC |
47.6 ± 8.3 |
834.9 ± 9.3 |
2.18 ± 0.36 |
| MX1 |
20.2 ± 8.1 |
661.9 ± 7.8 |
2.18 ± 0.36 |
| MX2 |
22.4 ± 8.9 |
692.4 ± 8.0 |
2.18 ± 0.36 |
| MX3 |
23.7 ± 9.1 |
704.3 ± 8.0 |
2.18 ± 0.36 |
| RH08 |
21.1 ± 8.1 |
598.3 ± 6.6 |
2.18 ± 0.36 |
| RH09 |
27.0 ± 7.8 |
592.4 ± 6.3 |
2.18 ± 0.36 |
| RH10 |
28.7 ± 7.9 |
601.0 ± 53.6 |
2.18 ± 0.36 |
| Average |
26.2 |
662.9 |
2.18 |
| Median |
23.7 |
661.9 |
2.18 |
| Deviation |
9.3 |
82.1 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
335.7 ± 3.5 |
58.2 ± 2.6 |
68.3 ± 6.1 |
83.6 ± 4.6 |
5.78 ± 0.29 |
4.03 ± 0.26 |
| VC |
390.2 ± 8.1 |
36.5 ± 1.7 |
48.7 ± 4.4 |
95.1 ± 4.8 |
10.72 ± 0.62 |
4.11 ± 0.27 |
| MX1 |
345.9 ± 4.3 |
57.5 ± 2.6 |
67.8 ± 6.1 |
84.1 ± 4.6 |
6.03 ± 0.32 |
4.13 ± 0.27 |
| MX2 |
348.4 ± 5.3 |
55.9 ± 2.5 |
66.8 ± 6.0 |
85.1 ± 4.6 |
6.24 ± 0.35 |
4.11 ± 0.28 |
| MX3 |
349.8 ± 5.8 |
55.0 ± 2.5 |
66.2 ± 5.9 |
85.7 ± 4.6 |
6.38 ± 0.37 |
4.09 ± 0.28 |
| RH8 |
298.7 ± 6.0 |
56.8 ± 2.6 |
67.4 ± 6.0 |
84.5 ± 4.6 |
5.27 ± 0.33 |
3.55 ± 0.26 |
| RH9 |
284.6 ± 7.0 |
52.6 ± 2.4 |
64.4 ± 5.8 |
87.2 ± 4.6 |
5.42 ± 0.37 |
3.28 ± 0.25 |
| RH10 |
284.8 ± 7.4 |
51.3 ± 2.3 |
63.4 ± 5.7 |
88.0 ± 4.6 |
5.57 ± 0.38 |
3.25 ± 0.25 |
| Average |
329.8 |
53.0 |
64.1 |
86.7 |
6.4 |
3.8 |
| Median |
345.9 |
55.9 |
66.8 |
85.7 |
6.0 |
4.1 |
| Deviation |
37.3 |
7.1 |
6.5 |
3.7 |
1.8 |
0.4 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
160.9 ± 11.9 |
98.2 ± 7.3 |
109.7 ± 15.3 |
145.7 ± 6.1 |
1.65 ± 0.23 |
1.11 ± 0.12 |
| VC |
185.8 ± 15.2 |
62.0 ± 4.0 |
78.2 ± 10.9 |
164.4 ± 7.7 |
3.02 ± 0.42 |
1.14 ± 0.14 |
| MX1 |
166.0 ± 12.2 |
97.0 ± 7.2 |
109.0 ± 15.2 |
146.5 ± 6.1 |
1.73 ± 0.24 |
1.14 ± 0.12 |
| MX2 |
166.1 ± 12.3 |
94.5 ± 6.9 |
107.4 ± 15.0 |
148.1 ± 6.3 |
1.77 ± 0.24 |
1.13 ± 0.12 |
| MX3 |
167.1 ± 12.4 |
93.0 ± 6.7 |
106.3 ± 14.8 |
149.1 ± 6.4 |
1.81 ± 0.25 |
1.12 ± 0.12 |
| RH8 |
144.0 ± 10.2 |
96.0 ± 7.0 |
108.3 ± 15.1 |
147.2 ± 6.2 |
1.51 ± 0.20 |
0.98 ± 0.10 |
| RH9 |
137.1 ± 9.9 |
89.1 ± 6.2 |
103.5 ± 14.4 |
151.5 ± 6.6 |
1.55 ± 0.20 |
0.91 ± 0.10 |
| RH10 |
137.1 ± 10.0 |
86.9 ± 6.0 |
101.8 ± 14.2 |
152.7 ± 6.7 |
1.59 ± 0.20 |
0.90 ± 0.10 |
| Average |
158.0 |
89.6 |
103.0 |
150.7 |
1.8 |
1.1 |
| Median |
166.0 |
94.5 |
107.4 |
149.1 |
1.7 |
1.1 |
| Deviation |
17.2 |
11.8 |
10.4 |
6.1 |
0.5 |
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)
| 
