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Timeline of Special/Noteworthy Events |
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Date |
Bias Level |
Start Time (command sent) |
Notes |
April 17, 2008 |
0 nA |
turn-on |
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May 28, 2008 |
40 nA sweep |
16:50Z |
15 steps from 0 to 40 nA, each step lasting 21 secs, one sweep per orbit, 40 nA between sweeps |
May 31, 2008 |
20 nA sweep |
16:10Z |
15 steps from 0 to 20 nA, each step lasting 21 secs, one sweep per orbit, 20 nA between sweeps |
June 19, 2008 |
10 nA |
12:00Z |
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July 3, 2008 |
0 nA |
16:02Z |
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July 25, 2008 |
0 nA |
17:20Z |
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July 31, 2008 |
10 nA |
16:02Z |
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August 1, 2008 |
0 nA |
16:00Z |
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September 4, 2008 |
30 nA |
16:02Z |
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September 27, 2008 |
0 nA |
00:49Z |
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September 27, 2008 |
40 nA |
16:04Z |
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October 18, 2008 |
50 nA |
16:00Z |
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October 22, 2008 |
10 nA |
16:00Z |
Start of ramp to 57.3 nA |
October 27, 2008 |
57.3 nA |
15:02Z |
End of ramp to 57.3 nA |
October 27, 2008 |
0 nA |
15:02Z |
Immediate reset to 0 nA |
October 28, 2008 |
10 nA |
16:03Z |
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December 3, 2008 |
57.3 nA |
16:36Z |
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December 3, 2008 |
0 nA |
18:10Z |
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December 10, 2008 |
10 nA |
16:00Z |
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January 30, 2009 |
20 nA |
16:00Z |
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Note: Only changes to bias level are listed. Table last updated 2/9/2009.
VEFI Sphere Bias Level History
Vector Electric Field Instrument (VEFI)
Exploring the Electrodynamics of the Earth's Low Latitude Ionosphere
