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Omissions and Comments

Currently only tracking passes from August 1, 1997 to the present are included in this report.

The purpose of the report is to present overall failure rates to determine operator scheduling. It is not intended as an absolute measure of the hardware and software failure rates of the NRAO OVLBI earth station. It should not be used to make decisions on software & hardware maintenance or improvements without more detailed information.

The information for this report was collected by the author from the NRAO OVLBI earth station logs, the operator log sheets, and the hardware & software maintenance logs. It is not guaranteed to be 100% accurate. The separation of errors into hardware and software errors reflects the (sometimes) arbitrary decision of the author and is intended to give a rough feel for the dependability of the software and the hardware. There was no attempt to distinguish between human errors and actual mechanical errors in the hardware category.

Toney Minter