Online Help Pitfalls
Plasmasphere Related |
Region: Lobes
|
| Problem Type |
Frequency of Occurence |
Ease of detection |
Remediable? |
Data Loss Severity |
|---|---|---|---|---|
| Wide electrostatic wake |
Frequent (possibly 100%) |
Difficult |
No |
Complete |
Examples of good EFW data in the lobes
| The
period from July to October, 2001 was examined. Periods where Cluster
was clearly in the lobes were identified from the quicklook plots (main criteria
was the absense of ions). All such periods where EDI had "good" data
were compared to EFW. No period showed convincing agreement between
EDI and EFW. It is clearly possible that "good" periods exist. If you know of such an interval, please contact the PI team. |
Problem: Wide Electrostatic Wakes.
| Examples of the problem |
2001-10-10 1100 C3 This example shows large DC fields not seen by EDI or CIS. The data is still sinusoidal over the spin. Description of the plotted quantities. 2001-08-01 2110 C3 This example shows how ASPOC reduces the spurious fields seen in the lobes. Even after ASPOC turns on, however, ageement is still poor. 2001-09-22 1000 C3 This example shows a large disagreement between EFW and CIS/EDI (which agree well; note that the line giving EDI Ex is almost completely obscured by the CIS data) over 2 hours. |
| Description of the problem |
The data shows major differences when compared to EDI or CIS. |
| How can it be detected? |
This
can only be detected by comparisons with EDI or CIS data. Unfortunately,
both of these instruments also encounter difficulties in the lobes. |
| How can it be corrected? |
It seems unlikely that this can be corrected. |
| Why does it occur? |
It seems likely that this is related
to the electrostatic wakes seen in the polar cap region. However, the
data is still sinusoidal; no wake can be seen. It is believed that
this is because the booms remain inside the wake at all times. |
| Other notes |
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