Database: Ace Shock Analysis
Event ID: 19991380003
Observation time: 05/18/1999 138.00249 0003 [UT]
|
|
General
Information (About, Top)
| Year |
1999 |
| Fractional day of year |
138.002488 |
| Arrival time of shock [seconds of day] |
215.0 ± 16.0 |
| Shock type |
FF |
| Electron data availability |
0 |
X GSE location of spacecraft [Re] |
0.035 |
| 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 |
0038 |
| Downstream plasma points selected for analysis |
0008
|
| Downstream field points selected for analysis |
0037 |
| Minimum chisq/dof for RH8,RH9,RH10 |
4.42, 9.38, 9.80 |
Event added to database
|
Sat Apr 30 21:44:02 2005
|
Event last processed
|
Wed Oct 15 15:00:45 2014
|
Method selected
|
RH08
|
Propagation delay to Earth [minutes]
|
0.008 ± 0.000
|
Asymptotic
plasma
parameters (About, Top)
|
Parameter
|
Upstream
|
Downstream
|
| Vx GSE [km/s] |
-340.9 ± 1.1 |
-411.5 ± 2.7 |
| Vy GSE [km/s] |
-16.5 ± 1.6 |
-28.4 ± 1.8 |
| Vz GSE [km/s] |
18.5 ± 1.7 |
18.6 ± 1.8 |
| Wi [km/s] |
33.0 ± 1.2 |
47.5 ± 2.4 |
| We [km/s] |
1042.5 ± 39.4 |
1503.1 ± 74.5 |
| Ni [n/cc] |
8.3 ± 0.6 |
28.1 ± 1.3 |
| Bx GSE [nT] |
-5.6 ± 0.1 |
-5.5 ± 0.8 |
| By GSE [nT] |
2.0 ± 0.1 |
6.0 ± 1.2 |
| Bz GSE [nT] |
-0.6 ± 0.3 |
3.3 ± 1.7 |
Plasma Beta
|
0.558 ± 0.561
|
1.831 ± 1.866
|
Sound Speed [km/s]
|
42.54 ± 1.60
|
61.45 ± 3.00
|
Alfven Speed [km/s]
|
44.27 ± 1.74
|
35.81 ± 3.23
|
Best values of
shock
front normal for each method (About, Top)
| Method |
Nx |
Ny |
Nz |
Theta [degrees] |
Phi [degrees] |
| MC |
-0.950 ± 0.035 |
0.209 ± 0.118 |
-0.230 ± 0.226 |
-13.32 ± 6.02 |
167.59 ± 7.09 |
| VC |
-0.986 ± 0.005 |
-0.164 ± 0.029 |
0.005 ± 0.005 |
0.31 ± 1.85 |
189.44 ± 1.68 |
| MX1 |
-1.000 ± 0.007 |
-0.021 ± 0.344 |
-0.018 ± 0.018 |
-1.02 ± 6.57 |
181.20 ± 19.73 |
| MX2 |
-0.994 ± 0.013 |
-0.091 ± 0.136 |
0.054 ± 0.054 |
3.07 ± 3.88 |
185.22 ± 7.83 |
| MX3 |
-0.992 ± 0.012 |
-0.104 ± 0.095 |
0.068 ± 0.068 |
3.88 ± 5.69 |
186.01 ± 5.50 |
| RH08 |
-0.992 ± 0.001 |
-0.043 ± 0.010 |
0.117 ± 0.117 |
6.74 ± 0.58 |
182.51 ± 0.55 |
| RH09 |
-0.991 ± 0.009 |
-0.026 ± 0.070 |
0.128 ± 0.128 |
7.38 ± 4.01 |
181.50 ± 4.07 |
| RH10 |
-0.991 ± 0.009 |
-0.026 ± 0.070 |
0.128 ± 0.128 |
7.38 ± 4.01 |
181.50 ± 4.07 |
| Average |
-0.987 |
-0.033 |
0.032 |
1.803 |
181.871 |
| Median |
-0.991 |
-0.026 |
0.068 |
3.879 |
182.507 |
| Deviation |
0.015 |
0.110 |
0.119 |
6.880 |
6.445 |
Key shock
parameters (About, Top)
| Method |
ThetaBn |
Shock Speed |
Compression |
| MC |
10.5 ± 2.3 |
407.4 ± 0.6 |
3.38 ± 0.27 |
| VC |
30.1 ± 1.3 |
440.8 ± 0.6 |
3.38 ± 0.27 |
| MX1 |
21.9 ± 1.4 |
441.3 ± 0.6 |
3.38 ± 0.27 |
| MX2 |
26.9 ± 1.7 |
442.8 ± 0.6 |
3.38 ± 0.27 |
| MX3 |
27.9 ± 1.8 |
442.5 ± 0.6 |
3.38 ± 0.27 |
| RH08 |
26.0 ± 2.2 |
441.3 ± 0.6 |
3.38 ± 0.27 |
| RH09 |
25.5 ± 2.3 |
440.6 ± 0.6 |
3.38 ± 0.27 |
| RH10 |
25.5 ± 2.3 |
440.6 ± 5.1 |
3.38 ± 0.27 |
| Average |
24.3 |
437.1 |
3.38 |
| Median |
26.0 |
441.3 |
3.38 |
| Deviation |
6.1 |
12.1 |
0.00 |
Upstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
91.1 ± 1.1 |
39.0 ± 0.8 |
43.5 ± 1.7 |
47.5 ± 1.0 |
2.34 ± 0.07 |
1.92 ± 0.05 |
| VC |
101.6 ± 1.1 |
30.5 ± 0.6 |
38.3 ± 1.5 |
53.3 ± 1.0 |
3.33 ± 0.09 |
1.91 ± 0.05 |
| MX1 |
100.4 ± 1.1 |
34.2 ± 0.7 |
41.1 ± 1.6 |
51.0 ± 1.0 |
2.93 ± 0.08 |
1.97 ± 0.05 |
| MX2 |
101.2 ± 1.1 |
32.0 ± 0.6 |
39.5 ± 1.5 |
52.4 ± 1.0 |
3.16 ± 0.09 |
1.93 ± 0.05 |
| MX3 |
101.1 ± 1.1 |
31.5 ± 0.6 |
39.1 ± 1.5 |
52.7 ± 1.0 |
3.21 ± 0.09 |
1.92 ± 0.05 |
| RH8 |
100.1 ± 1.1 |
32.4 ± 0.6 |
39.8 ± 1.6 |
52.2 ± 1.0 |
3.09 ± 0.09 |
1.92 ± 0.05 |
| RH9 |
99.7 ± 1.2 |
32.7 ± 0.6 |
40.0 ± 1.6 |
52.0 ± 1.0 |
3.06 ± 0.08 |
1.92 ± 0.05 |
| RH10 |
99.7 ± 1.2 |
32.7 ± 0.6 |
40.0 ± 1.6 |
52.0 ± 1.0 |
3.06 ± 0.08 |
1.92 ± 0.05 |
| Average |
99.4 |
33.1 |
40.2 |
51.6 |
3.0 |
1.9 |
| Median |
100.4 |
32.7 |
40.0 |
52.2 |
3.1 |
1.9 |
| Deviation |
3.4 |
2.6 |
1.6 |
1.8 |
0.3 |
0.0 |
Downstream wave speeds
and
mach numbers (About, Top)
|
Method
|
dV
|
Slow
|
Intermediate
|
Fast
|
Slow
Mach
|
Fast
Mach
|
| MC |
26.6 ± 2.7 |
34.9 ± 3.0 |
35.2 ± 3.2 |
62.0 ± 2.8 |
0.77 ± 0.12 |
0.43 ± 0.04 |
| VC |
30.1 ± 2.8 |
29.3 ± 2.2 |
31.0 ± 2.8 |
64.9 ± 2.2 |
1.03 ± 0.15 |
0.46 ± 0.04 |
| MX1 |
29.6 ± 2.7 |
32.1 ± 2.6 |
33.2 ± 3.0 |
63.5 ± 2.5 |
0.93 ± 0.14 |
0.47 ± 0.04 |
| MX2 |
29.9 ± 2.7 |
30.5 ± 2.3 |
31.9 ± 2.9 |
64.3 ± 2.3 |
0.99 ± 0.14 |
0.47 ± 0.04 |
| MX3 |
29.9 ± 2.7 |
30.1 ± 2.3 |
31.7 ± 2.9 |
64.5 ± 2.3 |
1.00 ± 0.14 |
0.46 ± 0.04 |
| RH8 |
29.6 ± 2.6 |
30.8 ± 2.4 |
32.2 ± 2.9 |
64.2 ± 2.3 |
0.97 ± 0.14 |
0.46 ± 0.04 |
| RH9 |
29.4 ± 2.6 |
31.0 ± 2.4 |
32.3 ± 2.9 |
64.1 ± 2.3 |
0.96 ± 0.13 |
0.46 ± 0.04 |
| RH10 |
29.4 ± 2.6 |
31.0 ± 2.4 |
32.3 ± 2.9 |
64.1 ± 2.3 |
0.96 ± 0.13 |
0.46 ± 0.04 |
| Average |
29.3 |
31.2 |
32.5 |
63.9 |
1.0 |
0.5 |
| Median |
29.6 |
31.0 |
32.3 |
64.2 |
1.0 |
0.5 |
| Deviation |
1.1 |
1.7 |
1.3 |
0.9 |
0.1 |
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)
| 
