Garmin GPS Receiver 190 00266 00 User Manual

GPS 15  
TECHNICAL  
SPECIFICATIONS  
Õ
GARMIN International, Inc.  
1200 E. 151st Street  
Olathe, KS 66062 USA  
190-00266-00, Revision A  
August 2002  
 
TABLE OF CONTENTS  
1. INTRODUCTION  
1.1 CAUTIONS ........................................................................................................................................................ 1  
1.2 LIMITED WARRANTY .................................................................................................................................... 2  
1.3 OVERVIEW....................................................................................................................................................... 3  
1.4 FEATURES ........................................................................................................................................................ 3  
1.5 TECHNICAL SPECIFICATIONS...................................................................................................................... 4  
2. PINOUT  
2.1 DESCRIPTION .................................................................................................................................................. 6  
2.2 DIAGRAMS ....................................................................................................................................................... 7  
3. SOFTWARE INTERFACE  
3.1 RECEIVED NMEA 0183 SENTENCES............................................................................................................ 8  
3.2 TRANSMITTED NMEA 0183 SENTENCES.................................................................................................. 10  
4. MECHANICAL CHARACTERISTICS & MOUNTING.........................................................................14  
Appendix A. EARTH DATUMS...................................................................................................................15  
GPS 15 TECHNICAL SPECIFICATIONS  
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LIST OF FIGURES  
FIGURE 1. COMPUTER SERIAL PORT INTERCONNECTION ................................................................................ 7  
FIGURE 2. PDA SERIAL PORT INTERCONNECTION.............................................................................................. 7  
FIGURE 3. BASIC NMEA DEVICE INTERCONNECTION........................................................................................ 7  
FIGURE 4. GPS 15-F DIMENSIONS........................................................................................................................... 14  
FIGURE 5. GPS 15-W OUTLINE DRAWING............................................................................................................. 14  
LIST OF TABLES  
TABLE 1. SIGNAL/WIRE DESCRIPTIONS ................................................................................................................. 6  
TABLE 2. NMEA 0183 OUTPUT SENTENCE ORDER............................................................................................. 10  
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GPS 15 TECHNICAL SPECIFICATIONS  
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1
INTRODUCTION  
1.1 CAUTIONS  
CAUTION  
The GPS system is operated by the government of the United States, which is solely responsible for its  
accuracy and maintenance. Although the GPS 15 is a precision electronic NAVigation AID (NAVAID),  
any NAVAID can be misused or misinterpreted, and therefore become unsafe. Use these products at your  
own risk. To reduce the risk, carefully review and understand all aspects of these Technical Specifications  
before using the GPS 15. When in actual use, carefully compare indications from the GPS to all available  
navigation sources including the information from other NAVAIDs, visual sightings, charts, etc. For safety,  
always resolve any discrepancies before continuing navigation.  
FCC Compliance  
The GPS 15 complies with Part 15 of the FCC interference limits for Class B digital devices FOR HOME  
OR OFFICE USE. These limits are designed to provide reasonable protection against harmful interference  
in a residential installation, and are more stringent than “outdoor” requirements.  
Operation of this device is subject to the following conditions: (1) This device may not cause harmful  
interference, and (2) this device must accept any interference received, including interference that may  
cause undesired operation.  
This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in  
accordance with the instructions, may cause harmful interference to radio communications. However, there  
is no guarantee that interference will not occur in a particular installation. If this equipment does cause  
harmful interference to radio or television reception, which can be determined by turning the equipment off  
and on, the user is encouraged to try to correct the interference by one or more of the following measures:  
Reorient or relocate the receiving antenna.  
Increase the separation between the equipment and receiver.  
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  
Consult the dealer or an experienced radio/TV technician for help.  
The GPS 15 does not contain any user-serviceable parts. Unauthorized repairs or modifications could result  
in permanent damage to the equipment, and void your warranty and your authority to operate this device  
under Part 15 regulations.  
GPS 15 TECHNICAL SPECIFICATIONS  
P/N 190-00266-00  
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1.2 LIMITED WARRANTY  
This GARMIN product is warranted to be free from defects in materials or workmanship for one year from the  
date of purchase. Within this period, GARMIN will at its sole option, repair or replace any components that fail  
in normal use. Such repairs or replacement will be made at no charge to the customer for parts or labor,  
provided that the customer shall be responsible for any transportation cost. This warranty does not cover failures  
due to abuse, misuse, accident or unauthorized alteration or repairs.  
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL  
OTHER WARRANTIES EXPRESS OR IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY  
ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR  
PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS,  
WHICH MAY VARY FROM STATE TO STATE.  
IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR  
CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR INABILITY TO  
USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not allow the exclusion of  
incidental or consequential damages, so the above limitations may not apply to you.  
GARMIN retains the exclusive right to repair or replace the unit or software or offer a full refund of the purchase  
price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR  
ANY BREACH OF WARRANTY.  
To obtain warranty service, contact your local GARMIN authorized dealer. Or call GARMIN Customer Service  
at one of the numbers shown below, for shipping instructions and an RMA tracking number. The unit should be  
securely packed with the tracking number clearly written on the outside of the package. The unit should then be  
sent, freight charges prepaid, to any GARMIN warranty service station. A copy of the original sales receipt is  
required as the proof of purchase for warranty repairs.  
GARMIN International, Inc.  
1200 East 151st Street  
Olathe, Kansas 66062, U.S.A.  
GARMIN (Europe) Ltd.  
Unit 5, The Quadrangle, Abbey Park Industrial Estate  
Romsey, SO51 9AQ, U.K.  
Phone:  
FAX:  
913/397.8200  
913/397.0836  
Phone:  
FAX:  
44/1794.519944  
44/1794.519222  
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GPS 15 TECHNICAL SPECIFICATIONS  
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1.3 OVERVIEW  
The GPS 15 is part of GARMIN’s latest generation of GPS sensor boards designed for a broad spectrum of  
OEM (Original Equipment Manufacture) system applications. Based on the proven technology found in  
other GARMIN 12-channel GPS receivers, the GPS 15 will track up to 12 satellites at a time while  
providing fast time-to-first-fix, one-second navigation updates and low power consumption. Its far-reaching  
capabilities meet the sensitivity requirements of land navigation as well as the dynamics requirements of  
high-performance aircraft.  
These GPS designs utilize the latest technology and high-level circuit integration to achieve superior  
performance while minimizing space and power requirements. All critical components of the system  
including the RF/IF receiver hardware and the digital baseband are designed and manufactured by  
GARMIN to ensure the quality and capability of the GPS. The hardware capability combined with software  
intelligence makes the GPS 15 easy to integrate and use.  
These are complete GPS receivers that require minimal additional components to be supplied by an OEM  
or system integrator. A minimum system must provide the GPS with a source of power, an active GPS  
antenna, and a clear view of the GPS satellites. The system may communicate with the GPS 15 via its  
CMOS-level serial port. The GPS 15 stores data such as satellite orbital parameters, last-known position,  
date and time in battery backed up SRAM. End user interfaces such as keyboards and displays are the  
responsibility of the application designer.  
1.4 FEATURES  
12-channel GPS receiver tracks and uses up to 12 satellites for fast, accurate positioning and low power  
consumption.  
Compact, rugged design ideal for applications with minimal space. May be remotely mounted in an  
out-of-the-way location. Receiver status information can be displayed directly on a chartplotter or PC.  
User initialization is not required. Once installed, unit will automatically transmit navigation data.  
User-configurable navigation mode (2-dimensional or 3-dimensional fix).  
Provision for external power to maintain the non-volatile SRAM and real-time clock.  
Optional on-board backup battery to maintain the non-volatile SRAM and real-time clock for up to  
21 days.  
GPS 15 TECHNICAL SPECIFICATIONS  
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1.5 TECHNICAL SPECIFICATIONS  
Specifications are subject to change without notice.  
1.5.1 Physical Characteristics  
1.5.1.1 Size  
0.940” (23.88 mm) wide, 1.690” (42.93 mm) long, 0.309” (7.84 mm) high  
1.5.1.2 Weight  
0.35 oz. (10 g)  
1.5.1.3 Available Connector Options  
GPS 15-F:  
GPS 15-F:  
6-pin LIF connector, 1 millimeter pitch  
GPS 15-W:  
GPS 15-W:  
6-pin JST connector, 1 millimeter pitch; mating wire harness included  
(NOTE: available in Asia, or by special order)  
1.5.2 Electrical Characteristics  
1.5.2.1 Input Voltage  
3.3 Vdc regulated, ±50 mV ripple  
1.5.2.2 Input Current  
85 mA peak, 80 mA nominal  
1.5.2.3 GPS Receiver Sensitivity  
-165 dBW minimum  
1.5.3 GPS Performance  
1.5.3.1 Receiver  
12 parallel channel GPS receiver continuously tracks and uses up to 12 satellites to compute and update  
your position.  
1.5.3.2 Acquisition Times  
Reacquisition:  
Warm:  
Cold:  
Less than 2 seconds  
Approximately 15 seconds (all data known)  
Approximately 45 seconds (initial position, time and almanac known, ephemeris  
unknown)  
5 minutes (almanac known, initial position and time unknown)  
5 minutes (no data known)  
AutoLocateTM  
SkySearch:  
:
1.5.3.3 Update Rate  
1 second  
1.5.3.4 Accuracy  
GPS Standard Positioning Service (SPS)  
Position:  
Velocity:  
< 15 meters, 95% typical (100 meters with Selective Availability on)  
0.1 knot RMS steady state  
Dynamics: 999 knots velocity (only limited at altitude greater than 60,000 feet), 6g dynamics  
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1.5.4 Interfaces  
1.5.4.1 Electrical Characteristics  
1.5.4.1.1  
GPS 15  
CMOS level output for interfacing directly to a host microprocessor.  
Jumper settings determine baud rate. Factory setting is 4800 baud.  
1.5.4.2 Port 1 Protocols  
NMEA 0183 Version 3.00  
ASCII output sentences GPGGA, GPGSA, GPGSV, and GPRMC (NMEA-approved sentences);  
PGRME, PGRMM, and PGRMT (GARMIN proprietary sentences)  
NMEA 0183 Outputs (see Section 3.2 for full protocol specifications)  
Position, velocity and time  
Receiver and satellite status  
Geometry and error estimates  
NMEA 0183 Inputs (see Section 3.1 for full protocol specifications)  
Initial position, date and time (not required)  
Earth datum  
1.5.5 Environmental Characteristics  
Temperature:  
-30°C to +80°C (Operating); -40°C to +90°C (Storage)  
GPS 15 TECHNICAL SPECIFICATIONS  
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2
PINOUT  
2.1 DESCRIPTION  
The GPS 15-F utilizes a six-pin LIF connector. The GPS 15-W utilizes a six-pin JST connector with  
mating wire harness included.  
Table 1. Signal/Wire Descriptions  
GPS  
15  
Pin #  
1
Signal Name  
Description  
BACKUP POWER  
This input provides external power to maintain the battery-backed SRAM  
and real-time clock. This enables the user to provide backup power if  
needed for longer than the optional on-board backup battery will provide  
(roughly 21 days). Input voltage must be between +2.8 and +3.4 Vdc.  
Power and Signal Ground  
2
3
GROUND  
POWER  
Regulated +3.3 Vdc input. Peak operating current is 85 mA. Nominal  
operating current is 80 mA.  
4
PORT 1 DATA OUT  
Serial Asynchronous Output.  
CMOS compatible output designed to interface directly with a host  
microprocessor. Provides serial data which is formatted per “NMEA 0183,  
Version 3.0”. The baud rate is set during production to 4800, but other rates  
are available.  
5
6
PORT 1 DATA IN  
RF BIAS  
First Serial Asynchronous Input.  
CMOS compatible input designed to interface directly with a host  
microprocessor. Maximum input voltage range of 0 < V < 3.3.  
This input allows the user to externally apply a RF bias to the active  
antenna. Units are shipped with this feature disabled. By default, the unit  
will use an internal voltage to power the active antenna.  
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2.2 DIAGRAMS  
(-)  
(+)  
Fuse  
1A  
GPS 15  
Computer Serial Port  
Interconnection  
Power Source  
(1) WHITE: BACKUP POWER  
(2) BLACK: GROUND  
PIN 5: GROUND  
9
(3) RED: POWER  
4
PIN 3: DATA OUT  
8
GPS 15  
Power/Data Cable  
(4) YELLOW: PORT 1 DATA OUT  
(5) BLUE: PORT 1 DATA IN  
(6) ORANGE: RF BIAS  
7
6
PIN 2: DATA IN  
1
DB-9  
Serial Connector  
(Female Pin Contacts)  
Figure 1. Computer Serial Port Interconnection  
(-)  
(+)  
Fuse  
1A  
GPS 15  
PDA Serial Port  
Interconnection  
Power Source  
(1) WHITE: BACKUP POWER  
(2) BLACK: GROUND  
1
PIN 2: DATA OUT  
6
(3) RED: POWER  
GPS 15  
Power/Data Cable  
7
8
9
(4) YELLOW: PORT 1 DATA OUT  
(5) BLUE: PORT 1 DATA IN  
(6) ORANGE: RF BIAS  
PIN 3: DATA IN  
4
PIN 5: GROUND  
DB-9  
Serial Connector  
(Male Pin Contacts)  
Figure 2. PDA Serial Port Interconnection  
(-)  
(+)  
Fuse  
1A  
GPS 15  
Power Source  
Basic Interconnection  
POWER  
(1) WHITE: BACKUP POWER  
(2) BLACK: GROUND  
GROUND  
Host Application  
NMEA Device  
(3) RED: POWER  
DATA OUT  
DATA IN  
GPS 15  
Power/Data Cable  
(4) YELLOW: PORT 1 DATA OUT  
(5) BLUE: PORT 1 DATA IN  
(6) ORANGE: RF BIAS  
Figure 3. Basic NMEA Device Interconnection  
GPS 15 TECHNICAL SPECIFICATIONS  
P/N 190-00266-00  
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3
SOFTWARE INTERFACE  
The GPS 15 interface protocol design on COM 1 is based on the National Marine Electronics Association’s  
NMEA 0183 ASCII interface specification. This standard is fully defined in “NMEA 0183, Version 3.0”  
(copies may be obtained from NMEA, www.nmea.org).  
The GPS 15 interface protocol, in addition to transmitting navigation information as defined by  
NMEA˚0183, transmits additional information using the convention of GARMIN proprietary sentences.  
The following sections describe the NMEA 0183 data format of each sentence transmitted and received by  
the GPS 15.  
3.1 RECEIVED NMEA 0183 SENTENCES  
The subsequent paragraphs define the sentences that can be received on the GPS sensors’ COM 1 port. Null  
fields in the configuration sentence indicate no change in the particular configuration parameter. All  
sentences received by the GPS sensor must be terminated with <CR><LF>, the ASCII characters for  
carriage return (0D hexadecimal) and line feed (0A hexadecimal). The checksum *hh is used for parity  
checking data and is not required, but is recommended for use in environments containing high  
electromagnetic noise. It is generally not required in normal PC environments. When used, the parity bytes  
(hh) are the ASCII representation of the exclusive-or (XOR) sum of all the characters between the "$” and  
“*” characters, non-inclusive. Sentences may be truncated by <CR><LF> after any data field and valid  
fields up to that point will be acted on by the GPS sensor.  
3.1.1 Sensor Initialization Information (PGRMI)  
The $PGRMI sentence provides information used to initialize the GPS sensor’s set position and time used  
for satellite acquisition. Receipt of this sentence by the GPS sensor causes the software to restart the  
satellite acquisition process. If there are no errors in the sentence, it will be echoed upon receipt. If an  
error is detected, the echoed PGRMI sentence will contain the current default values. Current PGRMI  
defaults (with the exception of the Receiver Command, which is a command rather than a mode) can also be  
obtained by sending $PGRMIE to the GPS sensor.  
$PGRMI,<1>,<2>,<3>,<4>,<5>,<6>,<7>*hh<CR><LF>  
<1>  
<2>  
<3>  
<4>  
<5>  
<6>  
<7>  
Latitude, ddmm.mmm format (leading zeros must be transmitted)  
Latitude hemisphere, N or S  
Longitude, dddmm.mmm format (leading zeros must be transmitted)  
Longitude hemisphere, E or W  
Current UTC date, ddmmyy format  
Current UTC time, hhmmss format  
Receiver Command, A = Auto Locate, R = Unit Reset  
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3.1.2 Sensor Configuration Information (PGRMC)  
The $PGRMC sentence provides information used to configure the GPS sensor’s operation. Configuration  
parameters are stored in non-volatile memory and retained between power cycles. The GPS sensor will  
echo this sentence upon its receipt if no errors are detected. If an error is detected, the echoed PGRMC  
sentence will contain the current default values. Current default values can also be obtained by sending  
$PGRMCE to the GPS sensor.  
$PGRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>,<13>,<14>*hh<CR><LF>  
<1>  
Fix mode, A = automatic, 2 = 2D exclusively (host system must supply altitude),  
3 = 3D exclusively  
<2>  
<3>  
Altitude above/below mean sea level, -1500.0 to 18000.0 meters  
Earth datum index. If the user datum index (96) is specified, fields <4> through <8> must contain  
valid values. Otherwise, fields <4> through <8> must be null. Refer to Appendix A for a list of  
earth datums and the corresponding earth datum index.  
<4>  
<5>  
<6>  
<7>  
<8>  
<9>  
User earth datum semi-major axis, 6360000.000 to 6380000.000 meters (.001 meters resolution)  
User earth datum inverse flattening factor, 285.0 to 310.0 (10-9 resolution)  
User earth datum delta x earth centered coordinate, -5000.0 to 5000.0 meters (1 meter resolution)  
User earth datum delta y earth centered coordinate, -5000.0 to 5000.0 meters (1 meter resolution)  
User earth datum delta z earth centered coordinate, -5000.0 to 5000.0 meters (1 meter resolution)  
Not used.  
<10> Not used.  
<11> Velocity filter, 0 = No filter, 1 = Automatic filter, 2-255 = Filter time constant  
(e.g., 10 = 10 second filter)  
<12> Not used.  
<13> Not used.  
<14> Dead reckoning valid time 1-30 (sec)  
All configuration changes take effect after receipt of a valid value.  
3.1.3 Miscellaneous Commands (PGRMO)  
The $PGRMO sentence provides the ability to change between normal and power save modes, as well as  
select Garmin data format for the remainder of the power cycle.  
$PGRMO,<1>,<2>*hh<CR><LF>  
<1>  
<2>  
Not used.  
Command, where:  
B = change to power save mode.  
G = change to Garmin proprietary data format for the remainder of the power cycle.  
N = change to normal (as opposed to power save) mode.  
GPS 15 TECHNICAL SPECIFICATIONS  
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3.2 TRANSMITTED NMEA 0183 SENTENCES  
The subsequent paragraphs define the sentences that can be transmitted on COM 1 by the GPS sensor.  
3.2.1 Sentence Transmission Rate  
The GPS sensor will transmit each sentence (except where noted in particular transmitted sentence  
descriptions) at a one-second rate. The GPS sensor will transmit the following sentences contiguously. The  
contiguous transmission starts at a GPS second boundary. The information transmitted by the GPS sensor  
is referenced to the GPS second boundary immediately preceding the GPRMC sentence.  
Table 2. NMEA 0183 Output Sentence Order  
Sentence  
GPRMC  
GPGGA  
GPGSA  
GPGSV  
PGRME  
PGRMT  
PGRMM  
Output by Default?  
Once per minute  
The maximum number of fields allowed in a single sentence is 82 characters including delimiters. Values  
in the table include the sentence start delimiter character “$” and the termination delimiter <CR><LF>.  
The factory set defaults will result in a once per second transmission at the NMEA 0183 specification  
transmission rate of 4800 baud.  
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3.2.2 Transmitted Time  
The GPS sensor outputs UTC (Coordinated Universal Time) date and time of day in the transmitted  
sentences. Prior to 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.  
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, the second is inserted beginning at 23h 59m 60s of the last day of  
a month and ending at 0h 0m 0s of the first day of the following month. 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, 1989 as follows:  
Date  
Time  
311289 235959  
311289 235960  
010190 000000  
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 23h 59m 59s for the day from which the leap second is removed.  
3.2.3 Global Positioning System Fix Data (GGA)  
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>*hh<CR><LF>  
<1>  
<2>  
<3>  
<4>  
<5>  
<6>  
UTC time of position fix, hhmmss format  
Latitude, ddmm.mmmm format (leading zeros will be transmitted)  
Latitude hemisphere, N or S  
Longitude, dddmm.mmmm format (leading zeros will be transmitted)  
Longitude hemisphere, E or W  
GPS quality indication, 0 = fix not available, 1 = Non-differential GPS fix available, 2 =  
Differential GPS (DGPS) fix available, 6 = Estimated  
Number of satellites in use, 00 to 12 (leading zeros will be transmitted)  
Horizontal dilution of precision, 0.5 to 99.9  
<7>  
<8>  
<9>  
Antenna height above/below mean sea level, -9999.9 to 99999.9 meters  
<10> Geoidal height, -999.9 to 9999.9 meters  
<11> Not used.  
<12> Not used.  
3.2.4 GPS DOP and Active Satellites (GSA)  
$GPGSA,<1>,<2>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<3>,<4>,<5>,<6>*hh<CR><LF>  
<1>  
<2>  
<3>  
Mode, M = manual, A = automatic  
Fix type, 1 = not available, 2 = 2D, 3 = 3D  
PRN number, 01 to 32, of satellite used in solution, up to 12 transmitted (leading zeros will be  
transmitted)  
<4>  
<5>  
<6>  
Position dilution of precision, 0.5 to 99.9  
Horizontal dilution of precision, 0.5 to 99.9  
Vertical dilution of precision, 0.5 to 99.9  
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3.2.5 GPS Satellites in View (GSV)  
$GPGSV,<1>,<2>,<3>,<4>,<5>,<6>,<7>,...<4>,<5>,<6>,<7>*hh<CR><LF>  
<1>  
<2>  
<3>  
<4>  
<5>  
<6>  
<7>  
Total number of GSV sentences to be transmitted  
Number of current GSV sentence  
Total number of satellites in view, 00 to 12 (leading zeros will be transmitted)  
Satellite PRN number, 01 to 32 (leading zeros will be transmitted)  
Satellite elevation, 00 to 90 degrees (leading zeros will be transmitted)  
Satellite azimuth, 000 to 359 degrees, true (leading zeros will be transmitted)  
Signal to noise ratio (C/No) 00 to 99 dB, null when not tracking (leading zeros will be transmitted)  
NOTE: Items <4>,<5>,<6> and <7> repeat for each satellite in view to a maximum of four (4) satellites  
per sentence. Additional satellites in view information must be sent in subsequent bursts of NMEA 0183  
data. These fields will be null if unused.  
3.2.6 Recommended Minimum Specific GPS/TRANSIT Data (RMC)  
$GPRMC,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>,<11>,<12>*hh<CR><LF>  
<1>  
<2>  
<3>  
<4>  
<5>  
<6>  
<7>  
<8>  
<9>  
UTC time of position fix, hhmmss format  
Status, A = Valid position, V = NAV receiver warning  
Latitude, ddmm.mmmm format (leading zeros will be transmitted)  
Latitude hemisphere, N or S  
Longitude, dddmm.mmmm format (leading zeros will be transmitted)  
Longitude hemisphere, E or W  
Speed over ground, 000.0 to 999.9 knots (leading zeros will be transmitted)  
Course over ground, 000.0 to 359.9 degrees, true (leading zeros will be transmitted)  
UTC date of position fix, ddmmyy format  
<10> Magnetic variation, 000.0 to 180.0 degrees (leading zeros will be transmitted)  
<11> Magnetic variation direction, E or W (westerly variation adds to true course)  
<12> Mode indicator, A = Autonomous, D = Differential, E = Estimated, N = Data not valid  
3.2.7 Estimated Error Information (PGRME)  
$PGRME,<1>,M,<2>,M,<3>,M*hh<CR><LF>  
<1>  
<2>  
<3>  
Estimated horizontal position error (HPE), 0.0 to 999.9 meters  
Estimated vertical position error (VPE), 0.0 to 999.9 meters  
Estimated position error (EPE), 0.0 to 999.9 meters  
3.2.8 Map Datum (PGRMM)  
The GARMIN Proprietary sentence $PGRMM gives the name of the map datum currently in use by the  
GPS sensor. This information is used by the GARMIN MapSource real-time plotting application.  
$PGRMM,<1>*hh<CR><LF>  
<1>  
Name of map datum currently in use (variable length field, e.g., “WGS 84”)  
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GPS 15 TECHNICAL SPECIFICATIONS  
P/N 190-00266-00  
 
3.2.9 Sensor Status Information (PGRMT)  
The GARMIN Proprietary sentence $PGRMT gives information concerning the status of the GPS sensor.  
This sentence is transmitted once per minute regardless of the selected baud rate.  
$PGRMT,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>*hh<CR><LF>  
<1>  
<2>  
<3>  
<4>  
<5>  
<6>  
<7>  
<8>  
<9>  
Product, model and software version (variable length field, e.g., “GPS 17 VER 2.05”)  
ROM checksum test, P = pass, F = fail  
Receiver failure discrete, P = pass, F = fail  
Stored data lost, R = retained, L = lost  
Real time clock lost, R = retained, L = lost  
Oscillator drift discrete, P = pass, F = excessive drift detected  
Data collection discrete, C = collecting, null if not collecting  
GPS sensor temperature in degrees C  
Not used.  
GPS 15 TECHNICAL SPECIFICATIONS  
P/N 190-00266-00  
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4
MECHANICAL CHARACTERISTICS & MOUNTING  
.167  
4.24  
.081  
2.06  
.940  
23.88  
.142  
3.60  
.047  
1.19  
.198  
5.04  
A
.177  
4.50  
1.690  
42.93  
1.490  
37.85  
1.387  
35.22  
PIN 1  
.037  
0.94  
.309  
7.84  
.105  
2.67  
.432  
10.97  
DETAIL A  
SCALE 3 : 1  
.110  
2.79  
.735  
18.67  
NOTES:  
1. DIMENSIONS IN MILLIMETERS [INCHES].  
2. DIMENSION TOLERENCES: 0.25mm [ 0.10"].  
3. USE M2 MOUNTING SCREWS.  
Figure 4. GPS 15-F Dimensions  
PIN 1  
NOTES:  
1. DIMENSIONS IDENTICAL TO GPS 15-F.  
2. USE M2 MOUNTING SCREWS.  
Figure 5. GPS 15-W Outline Drawing  
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Appendix A  
Earth Datums  
The following is a list of the GARMIN GPS 15 earth datum indices and the corresponding earth datum  
name (including the area of application):  
0
1
ADINDAN - Ethiopia, Mali, Senegal, Sudan  
AFGOOYE - Somalia  
2
3
AIN EL ABD 1970 - Bahrain Island, Saudi Arabia  
ANNA 1 ASTRO 1965 - Cocos Island  
4
5
ARC 1950 - Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia,  
ARC 1960 - Kenya, Tanzania  
Zimbabwe  
6
7
8
9
ASCENSION ISLAND 1958 - Ascension Island  
ASTRO BEACON “E” - Iwo Jima Island  
AUSTRALIAN GEODETIC 1966 - Australia, Tasmania Island  
AUSTRALIAN GEODETIC 1984 - Australia, Tasmania Island  
ASTRO DOS 71/4 - St. Helena Island  
ASTRONOMIC STATION 1952 - Marcus Island  
ASTRO B4 SOROL ATOLL - Tern Island  
BELLEVUE (IGN) - Efate and Erromango Islands  
BERMUDA 1957 - Bermuda Islands  
BOGOTA OBSERVATORY - Colombia  
CAMPO INCHAUSPE - Argentina  
CANTON ASTRO 1966 - Phoenix Islands  
CAPE CANAVERAL - Florida, Bahama Islands  
CAPE - South Africa  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
CARTHAGE - Tunisia  
CHATHAM 1971 - Chatham Island (New Zealand)  
CHUA ASTRO - Paraguay  
CORREGO ALEGRE - Brazil  
DJAKARTA (BATAVIA) - Sumatra Island (Indonesia)  
DOS 1968 - Gizo Island (New Georgia Islands)  
EASTER ISLAND 1967 - Easter Island  
EUROPEAN 1950 - Austria, Belgium, Denmark, Finland, France, Germany, Gibraltar, Greece,  
Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland  
EUROPEAN 1979 - Austria, Finland, Netherlands, Norway, Spain, Sweden, Switzerland  
FINLAND HAYFORD 1910 - Finland  
GANDAJIKA BASE - Republic of Maldives  
GEODETIC DATUM 1949 - New Zealand  
ORDNANCE SURVEY OF GREAT BRITAIN 1936 - England, Isle of Man, Scotland, Shetland  
Islands, Wales  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
GUAM 1963 - Guam Island  
GUX 1 ASTRO - Guadalcanal Island  
HJORSEY 1955 - Iceland  
HONG KONG 1963 - Hong Kong  
INDIAN - Bangladesh, India, Nepal  
INDIAN - Thailand, Vietnam  
IRELAND 1965 - Ireland  
ISTS O73 ASTRO 1969 - Diego Garcia  
JOHNSTON ISLAND 1961 - Johnston Island  
KANDAWALA - Sri Lanka  
KERGUELEN ISLAND - Kerguelen Island  
KERTAU 1948 - West Malaysia, Singapore  
GPS 15 TECHNICAL SPECIFICATIONS  
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Page 15  
Rev. A  
 
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
L.C. 5 ASTRO - Cayman Brac Island  
LIBERIA 1964 - Liberia  
LUZON - Mindanao Island  
LUZON - Phillippines (excluding Mindanao Island)  
MAHE 1971 - Mahe Island  
MARCO ASTRO - Salvage Islands  
MASSAWA - Eritrea (Ethiopia)  
MERCHICH - Morocco  
MIDWAY ASTRO 1961 - Midway Island  
MINNA - Nigeria  
NORTH AMERICAN 1927 - Alaska  
NORTH AMERICAN 1927 - Bahamas (excluding San Salvador Island)  
NORTH AMERICAN 1927 - Central America (Belize, Costa Rica, El Salvador, Guatemala,  
Honduras, Nicaragua)  
58  
59  
60  
NORTH AMERICAN 1927 - Canal Zone  
NORTH AMERICAN 1927 - Canada (including Newfoundland Island)  
NORTH AMERICAN 1927 - Caribbean (Barbados, Caicos Islands, Cuba, Dominican Republic,  
Grand Cayman, Jamaica, Leeward Islands, Turks Islands)  
NORTH AMERICAN 1927 - Mean Value (CONUS)  
NORTH AMERICAN 1927 - Cuba  
NORTH AMERICAN 1927 - Greenland (Hayes Peninsula)  
NORTH AMERICAN 1927 - Mexico  
NORTH AMERICAN 1927 - San Salvador Island  
NORTH AMERICAN 1983 - Alaska, Canada, Central America, CONUS, Mexico  
NAPARIMA, BWI - Trinidad and Tobago  
NAHRWAN - Masirah Island (Oman)  
NAHRWAN - Saudi Arabia  
NAHRWAN - United Arab Emirates  
OBSERVATORIO 1966 - Corvo and Flores Islands (Azores)  
OLD EGYPTIAN - Egypt  
OLD HAWAIIAN - Mean Value  
61  
62  
63  
64  
65  
66  
67  
68  
69  
70  
71  
72  
73  
74  
75  
76  
77  
78  
79  
80  
81  
82  
83  
OMAN - Oman  
PICO DE LAS NIEVES - Canary Islands  
PITCAIRN ASTRO 1967 - Pitcairn Island  
PUERTO RICO - Puerto Rico, Virgin Islands  
QATAR NATIONAL - Qatar  
QORNOQ - South Greenland  
REUNION - Mascarene Island  
ROME 1940 - Sardinia Island  
RT 90 - Sweden  
PROVISIONAL SOUTH AMERICAN 1956 - Bolivia, Chile, Colombia, Ecuador, Guyana, Peru,  
Venezuela  
84  
SOUTH AMERICAN 1969 - Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana,  
Paraguay, Peru, Venezuela, Trinidad and Tobago  
SOUTH ASIA - Singapore  
PROVISIONAL SOUTH CHILEAN 1963 - South Chile  
SANTO (DOS) - Espirito Santo Island  
SAO BRAZ - Sao Miguel, Santa Maria Islands (Azores)  
SAPPER HILL 1943 - East Falkland Island  
SCHWARZECK - Namibia  
SOUTHEAST BASE - Porto Santo and Madeira Islands  
SOUTHWEST BASE - Faial, Graciosa, Pico, Sao Jorge, and Terceira Islands (Azores)  
TIMBALAI 1948 - Brunei and East Malaysia (Sarawak and Sabah)  
TOKYO - Japan, Korea, Okinawa  
85  
86  
87  
88  
89  
90  
91  
92  
93  
94  
95  
96  
97  
TRISTAN ASTRO 1968 - Tristan da Cunha  
User defined earth datum  
VITI LEVU 1916 - Viti Levu Island (Fiji Islands)  
Page 16  
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98  
99  
WAKE-ENIWETOK 1960 - Marshall Islands  
WORLD GEODETIC SYSTEM 1972  
WORLD GEODETIC SYSTEM 1984  
ZANDERIJ - Surinam  
CH-1903 - Switzerland  
Hu - Tzu - Shan  
Indonesia 74  
Austria  
Potsdam  
100  
101  
102  
103  
104  
105  
106  
107  
108  
109  
Taiwan - modified Hu-Tzu-Shan  
GDA - Geocentric Datum of Australia  
Dutch  
GPS 15 TECHNICAL SPECIFICATIONS  
P/N 190-00266-00  
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Rev. A  
 
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Page 18  
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GPS 15 TECHNICAL SPECIFICATIONS  
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