Receiver Status - Position
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This page shows general information about the current position solution
derived from satellite measurements. This information includes:
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Position - The current position solution in the satellite
reference system.
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Lat - Latitude in degrees, minutes and seconds.
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Lon - Longitude in degrees, minutes and seconds.
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Hgt - Height above the ellipsoid in meters.
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Velocity - The apparent velocity of the receiver derived
from the difference of the current position relative to the
previous position.
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North - The apparent velocity in the grid north direction.
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East - The apparent velocity in the grid east direction.
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Up - The apparent velocity in the vertical direction.
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Horiz - The apparent velocity in the horizontal plane, expressed
as meters per second, miles per hour, and kilometers per hour.
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Heading - The apparent direction the receiver is moving in
the horizontal plane, expressed in degrees clockwise from true
north.
Note that a stationary receiver will show some velocity due to minor
differences in the position solution each time it is computed. The
receiver must be moving for these values to be meaningful for anything
other than general status information.
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Satellites Used - The list of satellites used in the
current position solution.
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Receiver Clock - Information about the receiver clock performance.
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Offset - The difference between the current time as reported by the clock
and the time derived from the GPS position solution.
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Drift - The rate at which the receiver clock is drifting from the time
derived from the GPS position solution.
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Dilutions of Precision - Information about the strength of the
satellite constellation with respect to a specific position attribute.
The various DOPs take into account the location of each satellite
relative to other satellites in the constellation, as well as their
location relative to the GPS receiver. Low DOP values indicate a
higher probability of accuracy.
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PDOP - Position DOP, indicates the strength of the satellite
constellation for general position accuracy.
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HDOP - Horizontal DOP, indicates the strength of the satellite
constellation for horizontal position accuracy.
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VDOP - Vertical DOP, indicates the strength of the satellite
constellation for horizontal position accuracy.
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TDOP - Time DOP, indicates the strength of the satellite
constellation for determining time and the clock offset.
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UTC Date & Time - The current date, time and GPS week number,
typically derived from GPS measurements. Note that this is not local time.
The local time offset must be applied to get local time.
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