ADU2 datasheet(90/162 Pages) ETC

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Page 78

ADU2 Operation and Reference Manual

In decimal almanac (DAL) format, the + sign is suppressed for a positive value in the

power of E. The spaces are for readability. Note that if this message is enabled at the

same time ALM is, ALM takes precedence and DAL is not output.

$PASHS,NME,GGA,x, ON/OFF

Enable/disable NMEA GPS position response message on port x, where x is either

port A or B, and y is ON or OFF. This message does not output unless position is

computed.

Example: Enable GGA on port A

$PASHS,NME,GGA,A,ON<Enter>

$GPGGA

NMEA response message for GGA (GPS position):

Format:

$GPGGA,hhmmss.ss,ddmm.mmmmm,s,dddmm.mmmmm,s,n,q

q,pp.p,saaaaa.aa,M,±xxxx.xx,M,sss,aaaa *cc<CR><LF>

where Table 5.20 lists the structure:

Table 5.20: $GPGGA Response Messages

Field

Description

hhmmss.ss

Current UTC time, hhmmss, of position fix in hours, minutes

and seconds.

ddmm.mmmmmm

Latitude component of position, ddmm.mmmmm, in degrees,

minutes and fraction of minutes.

Latitude sector, s = N - North, s = S - South.

dddmm.mmmmm

Longitude component of position, dddmm.mmmmm, in

degrees, minutes and fraction of minutes.

Longitude sector, s = E - East, s = W - West.

Raw/differential position, n

n = 1 - Raw; position is not differential corrected

n = 2 - position is deferentially corrected.

n = 9 - position computed using almanac information

qq = number of SVs used in position computation.

pp.p

HDOP - horizontal dilution of precision, pp.p = 00.0 to 99.9.

saaaa.aa

GPS Sensor-computed altitude, saaaaa

s = "+" or "-"

aaaaa = Altitude 00000 to 30000 meters above WGS-84 refer-

ence ellipsoid. For 2-D position computation this item con-

tains the altitude used to compute the position computation.

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