Database: Ace Shock Analysis
Event ID: 19990490208
Observation time: 02/18/1999 49.08947 0208 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
49.089468 |
| Arrival time of shock [seconds of day] |
7730.0 ± 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 |
0043 |
| Downstream plasma points selected for analysis |
0010
|
| Downstream field points selected for analysis |
0046 |
| Minimum chisq/dof for RH8,RH9,RH10 |
6.14, 30.18, 32.49 |
Event added to database
|
Sat Apr 30 21:43:45 2005
|
Event last processed
|
Wed Oct 15 14:52:49 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.006 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-395.8 ± 5.9 |
-591.1 ± 8.3 |
| Vy GSE [km/s] |
-19.5 ± 3.8 |
-54.3 ± 7.1 |
| Vz GSE [km/s] |
-47.4 ± 7.2 |
-68.6 ± 13.8 |
| Wi [km/s] |
40.2 ± 1.8 |
88.7 ± 4.7 |
| We [km/s] |
1269.8 ± 56.3 |
2803.9 ± 149.5 |
| Ni [n/cc] |
3.9 ± 0.6 |
10.6 ± 1.0 |
| Bx GSE [nT] |
-5.0 ± 0.8 |
-5.0 ± 0.7 |
| By GSE [nT] |
4.8 ± 0.4 |
16.8 ± 1.1 |
| Bz GSE [nT] |
1.9 ± 0.7 |
4.2 ± 2.3 |
Plasma Beta
|
0.264 ± 0.267
|
0.569 ± 0.593
|
Sound Speed [km/s]
|
51.62 ± 2.51
|
114.88 ± 6.13
|
Alfven Speed [km/s]
|
78.69 ± 6.42
|
120.00 ± 10.75
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.974 ± 0.065 |
0.002 ± 0.102 |
0.228 ± 0.224 |
13.17 ± 16.47 |
179.91 ± 6.01 |
| VC |
-0.979 ± 0.010 |
-0.172 ± 0.038 |
-0.106 ± 0.105 |
-6.06 ± 4.23 |
189.97 ± 2.21 |
| MX1 |
-0.999 ± 0.002 |
0.009 ± 0.074 |
-0.031 ± 0.031 |
-1.76 ± 3.84 |
179.51 ± 4.23 |
| MX2 |
-0.998 ± 0.003 |
0.010 ± 0.074 |
-0.058 ± 0.058 |
-3.34 ± 3.24 |
179.43 ± 4.26 |
| MX3 |
-0.997 ± 0.004 |
0.011 ± 0.075 |
-0.071 ± 0.071 |
-4.06 ± 3.23 |
179.39 ± 4.28 |
| RH08 |
-0.995 ± 0.003 |
-0.061 ± 0.035 |
-0.073 ± 0.072 |
-4.16 ± 2.00 |
183.51 ± 2.00 |
| RH09 |
-0.999 ± 0.003 |
0.044 ± 0.068 |
-0.017 ± 0.017 |
-0.96 ± 4.05 |
177.49 ± 3.91 |
| RH10 |
-0.997 ± 0.005 |
0.079 ± 0.068 |
0.017 ± 0.017 |
0.96 ± 4.05 |
175.49 ± 3.91 |
| Average |
-0.992 |
-0.010 |
-0.014 |
-0.779 |
180.586 |
| Median |
-0.997 |
0.010 |
-0.031 |
-1.763 |
179.506 |
| Deviation |
0.010 |
0.076 |
0.105 |
6.038 |
4.417 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
42.5 ± 6.2 |
674.8 ± 3.3 |
2.70 ± 0.50 |
| VC |
57.4 ± 7.3 |
719.3 ± 3.7 |
2.70 ± 0.50 |
| MX1 |
46.2 ± 7.4 |
712.5 ± 3.7 |
2.70 ± 0.50 |
| MX2 |
46.8 ± 7.5 |
714.1 ± 3.7 |
2.70 ± 0.50 |
| MX3 |
47.0 ± 7.5 |
714.1 ± 3.7 |
2.70 ± 0.50 |
| RH08 |
50.8 ± 7.4 |
718.5 ± 3.7 |
2.70 ± 0.50 |
| RH09 |
44.0 ± 7.4 |
708.3 ± 3.6 |
2.70 ± 0.50 |
| RH10 |
41.5 ± 7.3 |
702.1 ± 35.8 |
2.70 ± 0.50 |
| Average |
47.0 |
708.0 |
2.70 |
| Median |
46.8 |
714.1 |
2.70 |
| Deviation |
5.1 |
14.5 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
300.1 ± 5.4 |
34.1 ± 1.3 |
58.0 ± 4.7 |
87.8 ± 5.4 |
8.82 ± 0.43 |
3.43 ± 0.23 |
| VC |
323.1 ± 5.9 |
24.0 ± 0.9 |
42.4 ± 3.5 |
91.1 ± 5.3 |
13.50 ± 0.67 |
3.56 ± 0.24 |
| MX1 |
315.5 ± 5.9 |
31.6 ± 1.2 |
54.5 ± 4.4 |
88.7 ± 5.4 |
9.99 ± 0.50 |
3.57 ± 0.25 |
| MX2 |
316.3 ± 6.0 |
31.3 ± 1.2 |
53.9 ± 4.4 |
88.9 ± 5.4 |
10.13 ± 0.51 |
3.57 ± 0.25 |
| MX3 |
316.1 ± 6.0 |
31.1 ± 1.2 |
53.6 ± 4.4 |
88.9 ± 5.4 |
10.18 ± 0.52 |
3.57 ± 0.25 |
| RH8 |
319.7 ± 5.9 |
28.6 ± 1.1 |
49.7 ± 4.1 |
89.8 ± 5.3 |
11.21 ± 0.56 |
3.57 ± 0.25 |
| RH9 |
312.9 ± 5.9 |
33.1 ± 1.2 |
56.6 ± 4.6 |
88.2 ± 5.4 |
9.48 ± 0.48 |
3.56 ± 0.25 |
| RH10 |
309.8 ± 5.8 |
34.7 ± 1.3 |
59.0 ± 4.8 |
87.6 ± 5.4 |
8.94 ± 0.46 |
3.55 ± 0.25 |
| Average |
314.2 |
31.0 |
53.5 |
88.9 |
10.3 |
3.5 |
| Median |
316.1 |
31.6 |
54.5 |
88.9 |
10.1 |
3.6 |
| Deviation |
7.0 |
3.4 |
5.3 |
1.1 |
1.5 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
114.8 ± 9.0 |
66.3 ± 1.7 |
88.5 ± 7.9 |
152.7 ± 5.4 |
1.73 ± 0.14 |
0.75 ± 0.06 |
| VC |
123.7 ± 8.6 |
46.2 ± 1.2 |
64.6 ± 5.8 |
159.9 ± 5.4 |
2.68 ± 0.21 |
0.77 ± 0.06 |
| MX1 |
119.9 ± 8.2 |
61.4 ± 1.6 |
83.1 ± 7.4 |
154.7 ± 5.4 |
1.95 ± 0.15 |
0.78 ± 0.06 |
| MX2 |
120.4 ± 8.2 |
60.7 ± 1.6 |
82.2 ± 7.4 |
155.0 ± 5.4 |
1.99 ± 0.15 |
0.78 ± 0.06 |
| MX3 |
120.1 ± 8.2 |
60.3 ± 1.6 |
81.8 ± 7.3 |
155.1 ± 5.4 |
1.99 ± 0.15 |
0.78 ± 0.06 |
| RH8 |
121.7 ± 8.4 |
55.3 ± 1.5 |
75.9 ± 6.8 |
157.0 ± 5.4 |
2.20 ± 0.17 |
0.78 ± 0.06 |
| RH9 |
119.0 ± 8.2 |
64.3 ± 1.7 |
86.3 ± 7.7 |
153.5 ± 5.4 |
1.85 ± 0.14 |
0.78 ± 0.06 |
| RH10 |
118.2 ± 8.1 |
67.7 ± 1.8 |
89.9 ± 8.1 |
152.1 ± 5.4 |
1.75 ± 0.13 |
0.78 ± 0.06 |
| Average |
119.7 |
60.3 |
81.5 |
155.0 |
2.0 |
0.8 |
| Median |
120.1 |
61.4 |
83.1 |
155.0 |
2.0 |
0.8 |
| Deviation |
2.6 |
6.9 |
8.1 |
2.5 |
0.3 |
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)
| 
