USGlobalsat EB-5318RE - Manual (Page 21)

2012/8/31 21
Format: ＄PSRF105,<debug>*CKSUM<CR><LF>
<debug> 0=Off, 1=On
Example: Debug On ＄ PSRF105,1*3E
Example: Debug Off ＄ PSRF105,0*3F
G). Select Datum ID: 106 Selection of datum to be used for coordinate Transformations
GPS receivers perform initial position and velocity calculations using an earth-centered earth-fixed
(ECEF) coordinate system. Results may be converted to an earth model (geoid) defined by the
selected datum. The default datum is WGS 84 (World Geodetic System 1984) which provides a
worldwide common grid system that may be translated into local coordinate systems or map
datums. (Local map datums are a best fit to the local shape of the earth and not valid worldwide.)
Examples:
Datum select TOKYO_MEAN
$PSRF106,178*32
Name Example Unit Description
Message ID $PSRF106 PSRF106 protocol
header
Datum 178 21=WGS84
178=TOKYO_MEAN
179=TOKYO_JAPAN
180=TOKYO_KOREA
181=TOKYO_OKINAWA
Debug
Checksum *32
<CR><LF> End of message
termination