Basically, it's an area of increased radiation. You can find lots of info on the web. For example, at http://en.wikipedia.org/wiki/South_Atlantic_Anomaly .

-- Dave, W8AAS

On Nov 6, 2010, at 3:55 PM, Rodney Waln wrote:

so just what would that anomaly be?? if known just courious, Rodney kc0zhf

Message: 4 Date: Sat, 06 Nov 2010 09:32:25 -0400 From: "Mark L. Hammond" [email protected] Subject: [amsat-bb] AO-51 reloaded and operational To: [email protected] Cc: [email protected] Message-ID: [email protected] Content-Type: text/plain; charset="us-ascii"

Hi All,

Thanks to a great team effort, we have the AO-51 repeater back up and operational.

It will be several more hours before the PBBS is open for public access, but we expect it will be open around 2100utc today.

We usually get asked, "What caused the crash?" We honestly don't know. It is unlikely to be related to the power budget; it would have just turned a transmitter OFF in that case. We often suspect the South Atlantic Anomaly as the cause, and based on the time frame of the crash this time, it is a plausible hypothesis.

On behalf of the AO-51 Command Team,

Mark L. Hammond [N8MH]

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