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Отправлено
net 16 февраля 2002 г. 22:35 |
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A.18.5 Report Packet 0x8F-17 - UTM Single Precision Output
This packet reports position in UTM (Universal Transverse Mercator) format. The UTM
coordinate system is typically used for U.S. and international topographical maps.
The UTM coordinate system lays out a world-wide grid consisting of the following:
• 60 North/South zones in 6° increments extending eastward from the International
Date Line
• 10 East/West zones divided in 8° increments extending above and below the
Equator.
Coordinates within these boundaries cover all surface locations from 80° South to 84°
North and encircle the earth. Locations are indicated by offset from the equator and in the
zones east of the International Date Line. These offsets are known as Northing and Easting
and are expressed in meters. UTM is not usable in polar regions.
Table A-88 Report Packet 0x8F-17 Data Formats
Byte Item Type Value
0 Subcode 0x17
1 Gridzone Designation Char
2-3 Gridzone INT16
4-7 Northing Single Meters
8-11 Easting Single Meters
12-15 Altitude Single Meters
16-19 Clock Bias Single Meters
20-23 Time of Fix Single Seconds
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