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Garmin GPS 20x - page 1
GPS 20x TECHNICAL SPECIFICATIONS Garmin International, Inc. 1200 E. 151 st Street Olathe, KS 66062 USA 190-00880-00 , Rev ision A January 2008 a ...
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Garmin GPS 20x - page 2
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page i © 2008 Garmin Ltd. or its subsidiaries Garmin International, Inc. 1200 East 151 st Street, Olathe, Kansas 66062, U.S.A. Tel. 913/397.8200 or 800/800.1020 Fax 913/397. 8282 Garmin (Eur ope) Ltd. Liberty House, Hounsdown B usiness Park, Southampt on, Ham pshire, SO40 9RB , U. K . Tel. +44 ...
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Garmin GPS 20x - page 3
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page ii TABLE OF CONTENTS 1 Introduction .............................................................................................................................. 1 1.1 Cautions................................................................................................................. ...
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Garmin GPS 20x - page 4
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 1 1 INTRODUCTION 1.1 CAUTIONS CAUTION The GPS system is operated by the governm ent of the United States, which is s o lely responsible for its accuracy an d maintenance. Although th e GPS 20x is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted, a ...
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Garmin GPS 20x - page 5
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 2 1.2 LIMITED WARRANTY This Garmi n product is warra nted to be free from defects in materi als or workm anship for one year from the date of purchase. Within this peri od, Garmin will at its sole option, repair or replace any c omponents that fail in norm al use. Such repairs or replacem ...
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Garmin GPS 20x - page 6
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 3 1.3 OVERVIEW The GPS 20x includes an em bedded receiver a nd an antenn a. The GPS 20x tracks m ultiple satellites at a time while providing fast time-t o-first-fix na vigation u pdates once pe r second. This generation of GPS sensors includes t he capability of FAA Wide Area Augmenta tio ...
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Garmin GPS 20x - page 7
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 4 1.5 TECHNICAL SPECIFICATIONS Specifications are subject to change without notice. 1.5.1 Physical Characteristics 1.5.1.1 Size 1.7 in. (4 2.8 mm ) long × 1.3 in. (32.4 m m) wide × 0 .5 in. (12 mm) in hei ght 1.5.1.2 Weight 1.1 oz (31.7 g) 1.5.1.3 Color Silver 1.5.1.4 Case Material Polyc ...
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Garmin GPS 20x - page 8
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 5 1.5.3.4 Accuracy • GPS Standard Positioning Service (SPS) Position: < 15 meters, 95% typical Velocity: 0.1 knot RM S steady state • WAAS Position: < 3 meters, 95% typical Velocity: 0.1 knot RM S steady state • Dynamics: 999 knots velocity (only li mited at a ltitude greater t ...
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Garmin GPS 20x - page 9
2 MECHANICAL CHARACTERISTICS 1.7 in. ( 42.8 mm ) 1.3 in. ( 32.4 m m ) Figure 1. GPS 20x Top Case Dimensions 1.7 in. (42.8 mm ) 0.5 in. (1 2 mm) Figure 2. GPS 20x Side View 0.5 in. ( 12 mm ) Figure 3. GPS 2 0x End View 190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 6 ...
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Garmin GPS 20x - page 10
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 7 3 GPS 20x SOFTWARE INTERFACE The GPS 20x transmits using the Garmin USB interface . The Garmin USB interface is discussed in the Garmin Device Interface Specification found in the Garmin Device Interface SDK located on the Garmin Web site at: www.garmin.com/support/commProtoco l.html . Y ...
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Garmin GPS 20x - page 11
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 8 3.1.2 Transmitted Time The GPS senso r outputs Co ordinated Univ ersal Time (UTC ) date and ti me of day i n the transmi tted 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 cal ...
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Garmin GPS 20x - page 12
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 9 3.1.4 GPS DOP and Active Satellites (GSA) $GPGSA,<1>, <2>,<3>,<3>, <3>,<3> ,<3>, <3>,<3>,<3>, <3>,<3>,<3> ,< 3>,<4>,<5>,<6>*h h<CR><LF> <1> Mode, M = Manual, A = Aut om ...
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Garmin GPS 20x - page 13
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 10 3.1.7 Sensor Status Information (PGRMT) The Garmin Pr oprietary sentence $PGRMT gi ves inform ation concerning the status of t he GPS sensor. This sentence is transmitted once per minute regardless of the selected b aud rate. $PGRMT,<1> ,<2>,<3>,<4>, <5>,&l ...
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Garmin GPS 20x - page 14
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 11 APPENDIX A: EARTH DATUM LIST The following is a list of the Garmin GPS 20x Earth datum indices and the correspond ing earth datum name (including the area of ap pl i cati on): 0 ADINDAN–Et hiopia, Ma li, Senegal, S udan 9 AUSTRALIAN GEODETIC 1984– Australia, Tasmania Island 10 ASTRO ...
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Garmin GPS 20x - page 15
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 12 44 KERTAU 1948–West Malaysia, Sing apore 45 L.C. 5 ASTRO–Cayman Brac Island 46 LIBERIA 1964–Lib eria 47 LUZON–Mi ndanao Island 48 LUZON–Phillipp ines (excluding Mindanao Island) 49 MAHE 1971–Mahe Island 50 MARCO ASTR O–Salvage Isla nds 51 MASSAWA–Eritrea (Ethiopia) 52 ME ...
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Garmin GPS 20x - page 16
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 13 83 PROVISIONAL SOUTH AMERICAN 1956– Bo livia, Chile, Colombia, Ecuador, Guyan a, Peru, Venezuela 84 SOUTH AMERICAN 1969–Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Venezuela, Tri nidad and Tobago 85 SOUTH ASIA –Singapore 86 PROVISIONAL SOUTH CHILE ...
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Garmin GPS 20x - page 17
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 14 APPENDIX B: GARMIN BI NARY OUTPUT FORMAT In Binary Output mode, GPS 20x will transmit packets once per second . The records mu st be enabled by commands to the unit. Refer to the Garmin Device Interface Specification found i n the Garm in Device Int erface SDK fo r details on how to for ...
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Garmin GPS 20x - page 18
190-00880-00 GPS 20x Technical Specificatio n s Rev. A Page 15 Satellite Data Record The satellite data has a record ID of 0x72 with 84 (0x54) d ata bytes. The data bytes contain data for 12 satellites as described belo w. typedef struct { uint8 svid; //space vehicle identification (1–32 and 33–64 for WAAS) uint16 snr; //signal-to-noise ratio u ...
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Garmin GPS 20x - page 19
Position Record The Position Record has a record iden tifier of typedef struct { float alt; float epe; float eph; float epv; int fix; double gps_tow; double lat; double lon; float lon_vel; float lat_vel; float alt_vel; float msl_hght; int leap_sec; long grmn_days; } cpo_pvt_data; alt Ellipsoid altitude (meters) epe Estimated posi tion error (meters ...
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