GPS Scoring Procedures

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GPS Scoring Procedures
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The Concept

• Remove judges from ground checkpoints
• Improved scoring accuracy and reduction in number
  of timing errors
• Allows for tracking and judging of more
  parameters in the future

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Garmin GPS Map 76s

• Two units installed in each aircraft
• One designated primary, one secondary
• Position is recorded every second
• Approximately 10 foot accuracy
• Scoring data is captured every two seconds
• Allows for up to three hours of data
• Maximum error is 1 second per leg

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GPS Scoring Kit Installation

• Two GPS units will be sealed in a camcorder bag
  secured in the cargo compartment
• External antennas will be mounted
• In rear window of C152/C172 aircraft
• In side windows of baggage area of PA28 aircraft,
  one on each side
• Suction cups and tape will hold antennas in place

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Starting Time

• A gate has been established for each runway
• 17/35 is the preferential runway

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Arrival Over Turn Point

• Arrival time is determined in one of two ways
• Crossing the plane
• Point of closest approach (PCA)
• Missed turn point
• Scoring program will still take time, but will
  assess a penalty for missing the checkpoint

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Crossing The Plane
Time is taken as the aircraft crosses the plane
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Point of Closest Approach (PCA)
Time is taken at closest data plot to the turn
point within the 3/4 NM Turn Point Circle
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Crossing The Plane PCA
Since you are inside the Turn Point Circle, you
will be scored on crossing the plane, not PCA.
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Missed Checkpoint
Since you are outside the Turn Point Circle, you
will be scored on PCA, not breaking the plane,
and a missed checkpoint penalty will be assessed.
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Any Questions?