What is the accuracy of the Standard Positioning Service (SPS) GPS?

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Multiple Choice

What is the accuracy of the Standard Positioning Service (SPS) GPS?

Explanation:
SPS accuracy refers to what a civilian GPS receiver can typically achieve without any augmentation. The standard figure given for the horizontal position error is about 33 meters at the 95% confidence level. This means that in typical conditions, the reported position will be within roughly 33 meters of the true position most of the time. This baseline is what SPS provides; improvements to about 10 meters or better come from differential corrections or augmentation systems, not from SPS alone. The other options don’t fit because 12X36 isn’t a valid way to express GPS accuracy, and “unknown” isn’t used when a standard, published figure exists.

SPS accuracy refers to what a civilian GPS receiver can typically achieve without any augmentation. The standard figure given for the horizontal position error is about 33 meters at the 95% confidence level. This means that in typical conditions, the reported position will be within roughly 33 meters of the true position most of the time. This baseline is what SPS provides; improvements to about 10 meters or better come from differential corrections or augmentation systems, not from SPS alone. The other options don’t fit because 12X36 isn’t a valid way to express GPS accuracy, and “unknown” isn’t used when a standard, published figure exists.

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