Garmin 15L Spesifikasi Teknis - Halaman 18

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Halaman Cetak

Sentenc

GPRMC

GPGGA

GPGSA

GPGSV

PGRME

GPGLL

GPVTG

PGRMV

PGRMF

PGRMB

PGRMM

PGRMT

Table 2: NMEA 0183 Output Sentence Order and Size

Table 3: Characters per Second for Available Baud Rates

The maximum number of fields allowed in a single sentence is 82 characters including delimiters.

Values in the table include the sentence start delimiter character "$" and the termination delimiter

<CR><LF>. The factory set defaults result in a once per second transmission at the NMEA 0183

specification transmission rate of 4800 baud.

4.2.2

Transmitted Time

The GPS sensor outputs Coordinated Universal Time (UTC) date and time of day in the

transmitted sentences. Before the initial position fix, the on-board clock provides the date and

time of day. After the initial position fix, the date and time of day are calculated using GPS

satellite information and are synchronized with the closest UTC second boundary.

The GPS sensor uses information obtained from the GPS satellites to add or delete UTC leap

seconds and correct the transmitted date and time of day. The transmitted date and time of day

for leap second correction follow the guidelines in "National Institute of Standards and

Technology Special Publication 432 (Revised 1990)" (for sale by the Superintendent of

Documents, U.S. Government Printing Office, Washington, D.C., 20402, U.S.A.).

When a positive leap second is required, one second is inserted at the beginning of the first hour

(0h 0m 0s) of the day that the positive leap is occurring. The minute containing the leap second is

61 seconds long. The GPS sensor would have transmitted this information for the leap second

added December 31, 1998 as follows:

$GPRMC,235959,A,3851.3651,N,09447.9382,W,000.0,000.0,311298,003.3,E*65

$GPRMC,000000,A,3851.3651,N,09447.9382,W,000.0,000.0,010199,003.3,E*64

$GPRMC,000000,A,3851.3651,N,09447.9382,W,000.0,000.0, 010199,003.3,E*64

$GPRMC,000001,A,3851.3651,N,09447.9382,W,000.0,000.0, 010199,003.3,E*65

If a negative leap second should be required, one second will be deleted at the end of some UTC

month. The minute containing the leap second will be only 59 seconds long. In this case, the GPS

sensor will not transmit the time of day 0h 0m 0s (the "zero" second) for the day from which the

Output by Default?



Once per minute

Baud

Characters per Second

4800

480

9600

960

19200

1920

38400

3840

Maximum Characters