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NMEA Reference ManualSiRF Technology, Inc.217 Devcon DriveSan Jose, CA 95112 U.S.A.Phone: +1 (408) 467-0410Fax: +1 (408) 467-0420www.SiRF.comPart Num

1-2 NMEA Reference Manual—December 2007 1GGA —Global Positioning System Fixed DataNote – Fields marked in italic red apply only to NMEA version 2.3 (a

Output Messages 1-31Note – A valid position fix indicator is derived from the SiRF Binary M.I.D. 2 position mode 1. See the SiRF Binary Protocol Refer

1-4 NMEA Reference Manual—December 2007 1 GSV—GNSS Satellites in ViewTable 1-9 contains the values for the following example:$GPGSV,2,1,07,07,79,048,4

Output Messages 1-51Note – The MSS NMEA message can only be polled or scheduled using the MSK NMEA input message. See “MSK—MSK Receiver Interface” on

1-6 NMEA Reference Manual—December 2007 1VTG—Course Over Ground and Ground SpeedNote – Fields marked in italic red apply only to NMEA version 2.3 (and

Output Messages 1-71140— ProprietaryThis message is reserved for SiRF extended ephemeris usage only. The content of this message is proprietary.Table

1-8 NMEA Reference Manual—December 2007 1Table 1-16 contains the parameter definitions and example values.152—Extended Ephemeris IntegrityMessage ID 1

Output Messages 1-91154—Extended Ephemeris ACKMessage ID 154 is used by GSW2 (2.5 or above), SiRFXTrac (2.3 or above), and GSW3 (3.2.0 or above), and

2-1Input Messages2NMEA input messages enable you to control the Evaluation Receiver while in NMEA protocol mode. The Evaluation Receiver may be put in

2-2 NMEA Reference Manual—December 2007 2NMEA Input MessagesTable 2-2 describes the NMEA input messages.Note – NMEA input messages 100 to 106 are Si

ii NMEA Reference Manual—December 2007NMEA Reference ManualCopyright © 1996-2007 SiRF Technology, Inc. All rights reserved. No part of this work may b

Input Messages 2-32more extensive command message set is available. When a valid message is received, the parameters are stored in battery-backed SRAM

2-4 NMEA Reference Manual—December 2007 2102—SetDGPSPort This command is used to control the serial port used to receive RTCM differential correctio

Input Messages 2-52103—Query/Rate ControlThis command is used to control the output of standard NMEA messages GGA, GLL, GSA, GSV, RMC, and VTG. It als

2-6 NMEA Reference Manual—December 2007 2Table 2-11 contains the input values for the following example:Start using known position and time.$PSRF104

Input Messages 2-72106—Select DatumGPS receivers perform initial position and velocity calculations using an earth-centered earth-fixed (ECEF) coordin

2-8 NMEA Reference Manual—December 2007 2107—ProprietaryThis message is reserved for SiRF extended ephemeris usage only. The content of this message

Input Messages 2-92112 – Set Message RateThis message is not for general usage and is used for SiRF extended ephemeris usage only at this time.Table 2

ADDITIONAL AVAILABLE PRODUCT INFORMATIONNMEA Reference Manual© 2007 SiRF Technology Inc. All rights reserved. Products made, sold or licensed by SiRF

iiiContentsPreface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii1. Output Messages. . . . .

iv NMEA Reference Manual—December 2007101—NavigationInitialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3102—SetDGPSPort . . .

vTablesTable 1-1 NMEA Output Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Table 1-2 Supported NMEA Output Messages

vi NMEA Reference Manual—December 2007Table 2-5 Navigation Initialization Data Format . . . . . . . . . . . . . . . . . . . . . . . 2-3Table 2-6 Rese

viiPrefaceMost SiRF products support a subset of the NMEA-0183 standard for interfacing marine electronic devices as defined by the National Marine E

viii NMEA Reference Manual—December 2007 Contacting SiRF Technical SupportAddress:SiRF Technology Inc. 217 Devcon Drive San Jose, CA 95112 U.S.A.SiRF

1-1Output Messages1Table 1-1 lists each of the NMEA output messages specifically developed and defined by SiRF for use within SiRF products.A full de