1. Features

‧ Builds Skytraq Venus 6 high performance and low power consumption GPS Chipset.

‧ 65 parallel satellite-tracking channels for fast acquisition and reacquisition.

‧ Built in high gain LNA.

‧ Extremely fast Time-To-First-Fix(TTFF) at low signal level.

‧ Support NMEA 0183 v3.01 data protocol.

‧ For Car Navigation,Marine Navigation,Fleet Management,AVL and Location-Based Services,Auto Pilot,Personal Navigation or touring devices,Tracking devices/systems and mapping devices application.

2. Technical Specifications

(1) Receiver Type

‧ L1 frequency

‧ GPS C/A code

‧ 65-channel architecture

(2) Sensitivity

‧ -160dBm Acquisition

‧ -165dBm tracking

(3) Open sky Acquisition time

‧ 38 second cold start TTFF

‧ 1 second hot start

(4) Position accuracy

‧ Position 5m CEP without SA

‧ Velocity 0.1m/sec

‧ Timing 60ns

(5) Operational Limits

‧ Altitude <18,000meters (60,000 feet )

‧ Velocity < 515m/s

‧ Acceleration: 4 G, max

(6) Physical Characteristics

‧ Dimension: 53 * 53 * 15 mm

(7) Environmental Characteristics

‧ Operating temperature:

-40 to + 85

‧ Storage temperature:

-45 to +100

‧ Operating humidity:

5% to 90% No condensing.

‧ Power consumption

< 70mW at 3.0 - 5.5V input

(8) Protocol

‧ Datum: Default WGS-84

‧ NMEA output protocol: V.3.01

‧ Baud rate: 9600 bps

‧ Update Rate: 1 Hz

‧ Format: default GGA, GSA, GSV, RMC, VTG

3. Physical Dimension

IO Interface	Voltage level
4 pin 2.5/3.5mmEarphone Jack	UART(TTL level)

CN1 Pin	Pin define	Level
1	VCC	3.0—5V Dc
2	RXD	TTL input/ RS232
3	TXD	TTL output/ RS232
4	GND	Ground

Pin	Description	Internal wire color
1	NC
2	GND	Ground
3	RXD	TTL input/ RS232
4	TXD	TTL output/ RS232
5	VDD	3.0—5V Dc
6	NC

Pin	Pin define	Level
1	VCC	3.0—5V Dc
2	TXD	TTL input/ RS232
3	RXD	TTL output/ RS232
4	GND	Ground
5	GND	Ground

4. Software Interface

The output data in NMEA-0183 format as defined by the National Marine Electronics Association (NMEA), Version 3.01 Standard.

The default communication parameters for NMEA output are 9600 baud, 8 data bits, stop bit, and no parity.

Table 4-1 NMEA-0183 Output Messages

NMEA Record	Description
GPGGA	Global positioning system fixed data
GPGLL	Geographic position- latitude/longitude
GPGSA	GNSS DOP and active satellites
GPGSV	GNSS satellites in view
GPRMC	Recommended minimum specific GNSS data
GPVTG	Course over ground and ground speed

NMEA Message

The full descriptions of supported NMEA messages are provided at the following paragraphs.

GGA - Global Positioning System Fix Data

Time, position and fix related data for a GPS receiver.

Structure:

$GPGGA,hhmmss.sss,ddmm.mmmmm,a,dddmm.mmmmm,a,x,xx,x.x,x.xx,M,x.xx,M,,xxxx*hh<CR><LF>

1 2 3 4 5 6 7 8 9 10 11 12

Example:

$GPGGA,212742.954,2448.13492,N,12058.16712,E,1,09,1.0,19.31,M,19.40,M,,0000*60<CR><LF>

Field	Name	Example	Description
1	UTC Time	212742.954	UTC of position in hhmmss.sss format, (000000.000 ~ 235959.999)
2	Latitude	2448.13492	Latitude in ddmm.mmmmm format Leading zeros transmitted
3	N/S Indicator	N	Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South
4	Longitude	12058.16712	Longitude in dddmm.mmmmm format Leading zeros transmitted
5	E/W Indicator	E	Longitude hemisphere indicator, 'E' = East, 'W' = West
6	GPS quality indicator	1	GPS quality indicator 0: position fix unavailable 1: valid position fix, SPS mode 2: valid position fix, differential GPS mode 3: GPS PPS Mode, fix valid 4: Real Time Kinematic. System used in RTK mode with fixed integers 5: Float RTK. Satellite system used in RTK mode. Floating integers 6: Estimated (dead reckoning) Mode 7: Manual Input Mode 8: Simulator Mode
7	Satellites Used	09	Number of satellites in use, (00 ~ 12)
8	HDOP	1.0	Horizontal dilution of precision, (00.0 ~ 99.9)
9	Altitude	19.31	mean sea level (geoid), (-9999.99 ~ 17999.99)
10	Geodal Separation	19.40	Geoidal separation (-9999.99 ~ 17999.99)
11	DGPS Station ID	0000	Differential reference station ID, 0000 ~ 1023 NULL when DGPS not used
12	Checksum	60

GLL – Latitude/Longitude

Latitude and longitude of current position, time, and status.

Structure:

$GPGLL,ddmm.mmmmm,a,dddmm.mmmmm,a,hhmmss.sss,A,a*hh<CR><LF>

1 2 3 4 5 6 7 8

Example:

$GPGLL,2447.96928,N,12059.63137,E,211903.945,A,A*5F<CR><LF>

Field	Name	Example	Description
1	Latitude	2447.96928	Latitude in ddmm.mmmmm format Leading zeros transmitted
2	N/S Indicator	N	Latitude hemisphere indicator ‘N’ = North ‘S’ = South
3	Longitude	12059.63137	Longitude in dddmm.mmmmm format Leading zeros transmitted
4	E/W Indicator	E	Longitude hemisphere indicator 'E' = East 'W' = West
5	UTC Time	211903.945	UTC time in hhmmss.sss format (000000.000 ~ 235959.999)
6	Status	A	Status, ‘A’ = Data valid, ‘V’ = Data not valid
7	Mode Indicator	A	Mode indicator ‘N’ = Data not valid ‘A’ = Autonomous mode ‘D’ = Differential mode ‘E’ = Estimated (dead reckoning) mode ‘M’ = Manual input mode ‘S’ = Simulator mode 8 Checksum 09 Number of satellites in use, (00 ~ 12)
8	Checksum	09	Number of satellites in use, (00 ~ 12)

GSA – GNSS DOP and Active Satellites

GPS receiver operating mode, satellites used in the navigation solution reported by the GGA or GNS sentence and DOP values.

Structure:

$GPGSA,A,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh<CR><LF>

1 2 3 3 3 3 3 3 3 3 3 3 3 3 4 5 6 7

Example:

$GPGSA,A,3,05,12,21,22,30,09,18,06,14,01,31,,1.2,0.8,0.9*36<CR><LF>

Field	Name	Example	Description
1	Mode	A	Mode ‘M’ = Manual, forced to operate in 2D or 3D mode ‘A’ = Automatic, allowed to automatically switch 2D/3D
2	Mode	3	Fix type 1 = Fix not available 2 = 2D 3 = 3D
3	Satellite used 1~12	05,12,21,22,30,09,18,06,14,01,31,,	Satellite ID number, 01 to 32, of satellite used in solution, up to 12 transmitted
4	PDOP	1.2	Satellite ID number, 01 to 32, of satellite used in solution, up to 12 transmitted
5	HDOP	0.8	Horizontal dilution of precision (00.0 to 99.9)
6	VDOP	0.9	Vertical dilution of precision (00.0 to 99.9)
7	Checksum	36

GSV – GNSS Satellites in View

Number of satellites (SV) in view, satellite ID numbers, elevation, azimuth, and SNR value. Four satellites maximum per transmission.

Structure:

$GPGSV,x,x,xx,xx,xx,xxx,xx,…,xx,xx,xxx,xx *hh<CR><LF>

1 2 3 4 5 6 7 4 5 6 7 8

Example:

$GPGSV,3,1,12,05,54,069,45,12,44,061,44,21,07,184,46,22,78,289,47*72<CR><LF>

$GPGSV,3,2,12,30,65,118,45,09,12,047,37,18,62,157,47,06,08,144,45*7C<CR><LF>

$GPGSV,3,3,12,14,39,330,42,01,06,299,38,31,30,256,44,32,36,320,47*7B<CR><LF>

Field	Name	Example	Description
1	Number of message	3	Total number of GSV messages to be transmitted (1-3)
2	Sequence number	1	transmitted (1-3)
3	Satellites in view	12	Total number of satellites in view (00 ~ 12)
4	Satellite ID	05	Satellite ID number, GPS: 01 ~ 32, SBAS: 33 ~ 64 (33=PRN120)
5	Elevation	54	Satellite elevation in degrees, (00 ~ 90)
6	Azimuth	069	Satellite azimuth angle in degrees, (000 ~ 359 )
7	SNR	45	C/No in dB (00 ~ 99), Null when not tracking
8	Checksum	72

RMC – Recommended Minimum Specific GNSS Data

Time, date, position, course and speed data provided by a GNSS navigation receiver.

Structure:

$GPRMC,hhmmss.sss,A,dddmm.mmmmm,a,dddmm.mmmmm,a,x.xx,x.xx,ddmmyy,,,a*hh<CR><LF>

1 2 3 4 5 6 7 8 9 10 11

Example:

$GPRMC,211904.745,A,2447.96772,N,12059.63052,E,0008.04,203.92,170726,,,A*51<CR><LF>

Field	Name	Example	Description
1	UTC Time	212742.954	UTC time in hhmmss.sss format (000000.000 ~ 235959.999)
2	Status	A	Status ‘V’ = Navigation receiver warning ‘A’ = Data Valid
3	Latitude	2447.96772	Latitude in dddmm.mmmmm format Leading zeros transmitted
4	N/S indicator	N	Latitude hemisphere indicator ‘N’ = North ‘S’ = South
5	Longitude	12059.63052	Longitude in dddmm.mmmmm format Leading zeros transmitted
6	E/W Indicator	E	Longitude hemisphere indicator 'E' = East 'W' = West
7	Speed over ground	0008.04	Speed over ground in knots (0000.00 ~ 0971.92)
8	Course over ground	203.92	Course over ground in degrees (000.00 ~ 359.99)
9	UTC Date	170726	UTC date of position fix, ddmmyy format
10	Mode indicator	A	Mode indicator ‘N’ = Data not valid ‘A’ = Autonomous mode ‘D’ = Differential mode ‘E’ = Estimated (dead reckoning) mode ‘M’ = Manual input mode ‘S’ = Simulator mode
11	Checksum	51

VTG – Course Over Ground and Ground Speed

The Actual course and speed relative to the ground.

Structure:

GPVTG,x.xx,T,,M,x.xx,N,x.xx,K,a*hh<CR><LF>

1 2 3 4 5

Example:

$GPVTG,317.20,T,,M,0017.68,N,00032.75,K,A*01<CR><LF>

Field	Name	Example	Description
1	Course	317.20	True course over ground in degrees (000.00 ~ 359.99)
2	Speed	0017.68	Speed over ground in knots (0000.00 ~ 0971.92)
3	Speed	00032.75	Speed over ground in kilometers per hour (00000.00 ~ 01800.00)