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4

GXM 40 Owner’s Manual

Appendix

NEXRAD Overview

NEXRAD Description

NEXRAD Radar is a Doppler radar system that has greatly

improved the detection of meteorological events such as

thunderstorms, tornadoes, and hurricanes. An extensive

network of NEXRAD stations provides almost complete

radar coverage of the continental United States, Alaska,

and Hawaii, and the majority of Canada. The range of each

NEXRAD is 124 nautical miles.

NEXRAD Abnormalities

There are possible abnormalities regarding displayed

NEXRAD images. Some, but not all, of those include the

following circumstances:

Ground clutter
Strobes and spurious radar data
Sun strobes, when the radar antenna points directly at the

sun
Military aircraft deployment of metallic dust (chaff),

which can cause alterations in radar scans

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Interference from buildings or mountains, which may

cause shadows

NEXRAD Limitations

Certain limitations exist regarding the NEXRAD radar

displays. Some, but not all, are listed here for your

awareness:

NEXRAD base reflectivity does not provide sufficient

information to determine cloud layers or precipitation

characteristics (for example, determining between hail

and rain).

NEXRAD base reflectivity is sampled at the minimum

antenna elevation angle. An individual NEXRAD site

cannot depict high altitude storms at close ranges, and

has no information about storms directly over the site.

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Содержание 010-00730-00

Страница 1: ...GXM 40 owner s manual XM Radio Smart Antenna ...

Страница 2: ...onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto provided that such electronic or printed copy of this manual must contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited Information in this docume...

Страница 3: ... manual discusses how to connect the GXM 40 and how to subscribe to XM WX Weather and XM Radio services and provides detailed information about weather and audio features Operational procedures are found in the Owner s Manual for your unit Manual Conventions This manual refers to the GXM 40 XM Radio Smart Antenna as the GXM 40 All Garmin products that are compatible with the GXM 40 are referred to...

Страница 4: ...hould not be used to determine ground proximity for aircraft navigation WARNING This unit provides the ability to receive weather information through XM data Use weather data only as an aid to situational awareness Such weather information is merely supplemental and advisory in nature and is not intended to be relied upon as safety critical information in connection with any aviation vehicle or ma...

Страница 5: ...ct its packaging and its components contain chemicals known to the State of California to cause cancer birth defects or reproductive harm This Notice is provided in accordance with California s Proposition 65 See www garmin com prop65 for more information ...

Страница 6: ...ds 14 NEXRAD Radar 16 Satellite Mosaic 17 Echo Tops 18 Surface Pressure 19 Lightning 20 Storm Cells 21 Freezing Level 22 Forecast 22 Fronts 23 Hurricanes 24 County Warnings 25 XM Radio 26 Visibility 27 Water Temperature 28 Wave Period 28 Wave Direction 29 Wave Height 29 Marine Warnings 30 Buoy Reports 31 Appendix 32 GXM 40 Specifications 32 Feature Broadcast Rates 33 NEXRAD Overview 34 FCC Complia...

Страница 7: ... the unit Storage Do not store the GXM 40 where exposure to extreme temperatures may occur as permanent damage may result Servicing Your Unit The Garmin GXM 40 has no user serviceable parts Should you ever encounter a problem with your unit take it to an authorized Garmin dealer for repairs or contact Garmin Product Support at 1 800 800 1020 The GXM 40 is fastened shut with screws Any attempt to o...

Страница 8: ...rted Connecting the GXM 40 to a Garmin Unit Position the GXM 40 where it has a clear view of the sky for example on the outside of the vehicle or behind the windshield of the vehicle Connect the GXM 40 to the USB port on the Garmin unit ...

Страница 9: ... to other XM questions call the above number or visit www xmwxweather com Step 4 Confirm all components of your service package XM WX Weather Keep your Garmin unit turned on to ensure that you receive the XM signal The XM signal is being received when the components of the selected service package are displayed in the Weather Products list Do not turn off the Garmin unit until the name of the sele...

Страница 10: ...atellite Weather Web site at http weather xmradio com weather for more information Any weather feature can change in appearance or interpretation if the source that provides the information changes XM WX Weather data is broadcast at set rates see page 33 for all weather related broadcast rates For example NEXRAD Radar data is broadcast at five minute intervals When the Garmin unit is turned on or ...

Страница 11: ...o five miles IFR ceiling 500 to below 1000 ft AGL and or visibility one mile to less than three miles Low IFR ceiling below 500 ft AGL or visibility less than one mile VFR ceiling greater than 3000 ft AGL and visibility greater than five miles Undetermined METAR Selected With Map Pointer METAR Detailed Information Marginal VFR ceiling 1000 3000 ft AGL and or visibility three to five miles IFR ceil...

Страница 12: ...as necessary due to changing weather conditions or the issuance or cancellation of a SIGMET SIGnificant METeorological Forecast AIRMETs are displayed as an colored dashed line AIRMET Sierra IFR purple Ceilings less than 1 000 feet and or visibility less than three miles affecting over 50 of the area at one time Extensive mountain obscuration AIRMET Tango Turbulence orange Moderate turbulence Susta...

Страница 13: ...ility to less than three statute miles A Convective SIGMET is issued for the following conditions thunderstorms isolated severe thunderstorms embedded thunderstorms hail at the surface and tornadoes A SIGMET is widespread and must affect or be forecast to affect an area of at least 3 000 square miles SIGMETs are displayed as a yellow dashed line To view SIGMET data select the SIGMET using the map ...

Страница 14: ...n issued TFRs are routinely issued for occurrences such as sporting events dignitary visits military depots and forest fires TFRs are represented as an area highlighted by red active or yellow not yet active To view information about the TFR select it with the map pointer TFR Selected With Map Pointer TFR Detailed Information TFR Selected With Map Pointer TFR Detailed Information ...

Страница 15: ...atures TAF Terminal Aerodrome Forecasts are issued by the National Weather Service for pilots They include 24 hour forecasts on wind visibility expected weather conditions and wind shear Terminal Aerodrome Forecast Terminal Aerodrome Forecast ...

Страница 16: ...isplay winds using wind barbs or a wind streamline depending on the zoom range of the map Similar to marine and automotive units the wind barbs indicate wind speed and direction Arrows indicate the direction of the wind streamline Wind Barbs Wind Streamline Wind Barbs Wind Streamline ...

Страница 17: ...rface winds The barb attached to the circle points in the direction of the wind Wind speed is indicated by different flags attached to the barb Wind Direction Calm 5 knots 10 knots 15 knots 20 knots 50 knots Surface Winds Wind Direction Calm 5 knots 10 knots 15 knots 20 knots 50 knots Surface Winds ...

Страница 18: ...ing shades and colors The time stamp in the lower left corner of the screen displays the elapsed time since the National Weather Service provided the information being displayed NEXRAD can be displayed independently or with a variety of other weather information For information on NEXRAD abnormalities limitations and intensity see pages 34 35 NEXRAD Legend NEXRAD NEXRAD Legend NEXRAD ...

Страница 19: ...atellite Mosaic The Satellite Mosaic feature displays infrared composite images of cloud cover taken by geostationary weather satellites providing up to seven levels of cloud cover Cloud Tops Legend Satellite Mosaic Cloud Tops Legend Satellite Mosaic ...

Страница 20: ...ops at or above the altitude you select are displayed in 5 000 foot increments up to 70 000 feet Echo Tops can be helpful in determining the severity of thunderstorms where higher altitudes equate to more intense thunderstorms Echo Tops for All Altitudes Echo Tops at 15 000 Ft Echo Tops at 20 000 Ft Echo Tops for All Altitudes Echo Tops at 15 000 Ft Echo Tops at 20 000 Ft ...

Страница 21: ...e areas generally are associated with fair weather Low pressure areas generally are associated with clouds and the chance of precipitation Isobars that are packed closely together show a strong pressure gradient Strong pressure gradients are associated with areas of stronger winds Pressure units can be displayed in millibars mbar inches of mercury inHg and hectopascals hPa Strong Pressure Gradient...

Страница 22: ...age below Lightning strikes appear on the map if strikes have been detected within the last seven minutes The ground based lightning detection network only detects cloud to ground lightning Lightning bolts indicate a cloud to ground lightning strike Lightning bolts indicate a cloud to ground lightning strike Lightning Strikes ...

Страница 23: ...m the narrow end to the wide end indicates the projected path of the storm cell The red bars that span the cone indicate the projected area of the storm Each bar represents 15 minutes Aviation units show the direction of the storm with an arrow The tip of the arrow indicates the projected location of the storm in 15 minutes Select the storm cell with the map pointer to view critical information ab...

Страница 24: ...ers and city conditions The forecast can be viewed in 12 hour increments for the next 48 hours Freezing Level Contours Freezing Level Contours Forecast Map Forecast Legend Sunny Partly Cloudy Cloudy Mostly Cloudy Thunderstorms Rain Snow Freezing Rain Windy Haze Very Cold Foggy Very Hot Forecast Map Forecast Legend Sunny Partly Cloudy Cloudy Mostly Cloudy Thunderstorms Rain Snow Freezing Rain Windy...

Страница 25: ...nter a high pressure center is an area where the measured pressure is highest relative to the surrounding area Moving away from a high pressure center in any horizontal direction results in decreased pressure Winds flow clockwise around high pressure centers in North America Cold front Warm front Stationary front Occluded front Trough Indicates a low pressure center A low pressure center is an are...

Страница 26: ...at appear along the red line indicate the projected locations received from the National Hurricane Center The Center provides four forecasts at 12 hour intervals and a fifth forecast at a 24 hour interval Each forecast indicates the projected location of the hurricane at different points along its projected path Forecasted hurricane conditions at each projected location are also provided Hurricane...

Страница 27: ... is highlighted with the color corresponding to the warning To view information about the warning select the county with the map pointer Severe Thunderstorm Warning Tornado warning Severe thunderstorm warning Flood warning Flash flood warning Severe Thunderstorm Warning Tornado warning Severe thunderstorm warning Flood warning Flash flood warning ...

Страница 28: ...equires a subscription to XM Radio See page 7 for more information about subscribing to XM services You can scan channels by category and save them to a favorites list You can turn the XM audio output on and off Category Channel list Current song Category Channel list Current song ...

Страница 29: ...example below visibility ranges from 1 mile to 4 5 miles Visibility Contour Lines This image displays NEXRAD Radar Satellite Mosaic and Visibility Displaying multiple features may help to provide a clearer picture of the weather conditions in the area Visibility Contour Lines This image displays NEXRAD Radar Satellite Mosaic and Visibility Displaying multiple features may help to provide a clearer...

Страница 30: ...e Water Temperature feature displays the surface temperature of the water Isotherm lines indicate the temperature breaks Wave Period The Wave Period feature provides the time in seconds between successive waves Water Temperature Water Temperature Wave Period Wave Period ...

Страница 31: ...ction feature shows the direction in which waves are moving as indicated by the direction of the red arrow Wave Height The Wave Height feature displays wave heights The wave heights for an area are separated by contour lines Wave Direction Wave Direction Wave Height Wave Height ...

Страница 32: ... When a Marine Warning is issued the area of the warning is highlighted in red To view information about the warning select the warning area with the map pointer Marine Warnings Marine Warning Detailed Information Marine Warnings Marine Warning Detailed Information ...

Страница 33: ...nd coastal observation stations These readings are used to determine air temperature dew point water temperature tide wave height and period wind direction and speed visibility and barometric pressure Buoy Selected With Map Pointer Buoy Report Detail Buoy Selected With Map Pointer Buoy Report Detail ...

Страница 34: ...perature Range from 40 F to 185 F from 40 C to 85 C Case Fully sealed high impact plastic Waterproof IEC 60529 IPX7 standard 3 28 ft 1 m submersion for 30 minutes Mount Thread Size M3 0 5 Cable Braided shield 5 conductor 28 AWG 0 081 mm2 right angle male mini B connector Power Source 4 5 5 5 Vdc Usage 1 25 W max Performance Dynamics 999 knots 6 g ...

Страница 35: ...Track 12 min Visibility Forecast 12 min Fronts 12 min Water Temperature 12 min Wave Height 12 min Wave Period 12 min Wave Direction 12 min Feature Data Broadcast Frequency Buoy Reports 12 min City Forecast 12 min County Warnings 5 min Marine Warnings 20 min METAR 12 min AIRMET 12 min SIGMET 12 min Echo Tops 7 5 min Winds Aloft 12 min TFR 12 min TAF 12 min Freezing Level 12 min Feature Broadcast Ra...

Страница 36: ...und clutter Strobes and spurious radar data Sun strobes when the radar antenna points directly at the sun Military aircraft deployment of metallic dust chaff which can cause alterations in radar scans Interference from buildings or mountains which may cause shadows NEXRAD Limitations Certain limitations exist regarding the NEXRAD radar displays Some but not all are listed here for your awareness N...

Страница 37: ...dBZ Values Precipitation Table Display Rain Display Snow dBZ Rain inches per hour Snow inches per hour Remarks Rain Snow 10 0 00 in 0 00 in 5 0 00 in trace 0 0 00 in trace 0 05 in Very Light 5 0 00 in trace 0 10 in Light 10 0 00 in trace 0 01 in Light Light 15 0 01 in 0 1 0 2 in Light Light 20 0 02 in 0 2 0 3 in Light Light 25 0 05 in 0 3 0 5 in Light Light Moderate 30 0 09 in 0 5 0 7 in Light Mod...

Страница 38: ...se 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 of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment into an outlet that is on a different circuit from the GPS unit ...

Страница 39: ...ICH 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 ...

Страница 40: ...tes This warranty is provided by the local in country distributor and this distributor provides local service for your unit Distributor warranties are only valid in the area of intended distribution Units purchased in the United States or Canada must be returned to the Garmin service center in the United Kingdom the United States Canada or Taiwan for service Garmin International Inc 1200 East 151s...

Страница 41: ... valuable trade secret of Garmin You agree not to decompile disassemble modify reverse assemble reverse engineer or reduce to human readable form the Software or any part thereof or create any derivative works based on the Software You agree not to export or re export the Software to any country in violation of the export control laws of the United States of America XM Satellite Radio Service Agre...

Страница 42: ...nnection with any aircraft sea craft or automobile usage This information is provided as is and XM and Garmin disclaim any and all warranties express and implied with respect thereto or the transmission or reception thereof XM and Garmin further do not warrant the accuracy reliability completeness or timeliness of the traffic and weather information disclosed on the Radio Service In no event will ...

Страница 43: ...K IS REFLECTED IN OUR PRICES YOU MAY HAVE GREATER RIGHTS THAN DESCRIBED ABOVE UNDER YOUR STATE S LAWS a Under 10 U S C 456 no civil action may be brought against the United States on the basis of the content of a navigational aid prepared or disseminated by either the former Defense Mapping Agency DMA National Imagery and Mapping Agency NIMA or the National Geospatial Intelligence Agency NGA b The...

Страница 44: ...ght Restriction TFR data is provided by the FAA and may not be updated outside of normal business hours Confirm data currency though alternate sources and contact your local FSS for interpretation of TFR data This product has not been endorsed or otherwise approved by the National Geospatial Intelligence Agency or the United States Department of Defense 10 U S C 425 ...

Страница 45: ...NEXRAD abnormalities 34 colors 35 intensity 35 legend 16 limitations 34 O occluded front 23 P physical specifications 32 pressure gradient 19 pressure isobars 19 S saving the service package 7 serial number 2 set up the XM account 7 severe thunderstorm warning 25 SIGMET 11 software license agreement 39 specifications 32 stationary front 23 storage 5 strobes 34 strong pressure gradient 19 sun strob...

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Страница 48: ...t www garmin com 2008 Garmin Ltd or its subsidiaries Garmin International Inc 1200 East 151st Street Olathe Kansas 66062 USA Garmin Europe Ltd Liberty House Hounsdown Business Park Southampton Hampshire SO40 9RB UK Garmin Corporation No 68 Jangshu 2nd Road Shijr Taipei County Taiwan www garmin com Part Number 190 00942 00 Rev A ...

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