IntuVue RDR-4000 Weather Radar Pilot's Guide SECTION 1: INTRODUCTION Welcome to Honeywell’s IntuVue 3-D Automatic Weather Radar System, model RDR-4000. The RDR-4000 introduces several new technologies not found in previous generation Radar Systems. Some of the major operational differences are highlighted here. Note that the availability of some features will depend on the installation configuration.
IntuVue RDR-4000 Weather Radar Pilot's Guide Automatically corrects for curvature of the earth. Pilots can choose among display options as desired. Internal Topography Database Used to remove ground clutter from weather displays and to remove weather returns from the MAP display.
IntuVue RDR-4000 Weather Radar Pilot's Guide OPERATIONAL LIMITATIONS AND CONSIDERATIONS The limitations of the radar system have been consolidated here because of their importance. This section should be read thoroughly and frequently as a reminder of weather radar limitations. ...
IntuVue RDR-4000 Weather Radar Pilot's Guide SECTION 2: SIMPLIFIED OPERATING PROCEDURES CONFIGURATIONS Your system may have one of two control panels. The control panel installed indicates which features are available on your system. Modes OFF, ALL, ON PATH, OFF, ALL WX, PATH WX,...
IntuVue RDR-4000 Weather Radar Pilot's Guide ON/OFF The radar may be turned completely off by selecting OFF with the System Control Switch, which is located in the top center of the control panel. When this switch is in the OFF position, no weather radar information is available, and no predictive windshear detection will occur.
IntuVue RDR-4000 Weather Radar Pilot's Guide AVOIDANCE MANEUVERS When considering avoidance maneuvers keep the following in mind: Never deviate under a storm cell or the associated anvil. Plan deviations on the upwind side of storm cells to avoid turbulence generated downwind of convection, which may not be detectable by the radar.
IntuVue RDR-4000 Weather Radar Pilot's Guide SECTION 3: EXPANDED OPERATING INSTRUCTIONS TURN ON & SYSTEM SELECTION For single radar systems (only one radar processing system), place the System Control Switch in the 1 position to put the system into weather mode.
IntuVue RDR-4000 Weather Radar Pilot's Guide WEATHER DETECTION AUTOMATIC WEATHER MODE (ALL/ALL WX or ON PATH/ PATH WX) GENERAL DESCRIPTION The ALL/ALL WX and ON PATH/ PATH WX modes provide weather, turbulence, and predictive windshear detection. The system processes the data to fill the 3D memory and extracts the selected data for display.
IntuVue RDR-4000 Weather Radar Pilot's Guide ALL/ ALL WX WEATHER Select the ALL/ALL WX mode to display both on path and off path weather. The off path weather is displayed with black stripes through it. (See diagram on page 34.) This mode is useful for situational awareness and to aid in making changes to your flight plan to avoid on path weather.
IntuVue RDR-4000 Weather Radar Pilot's Guide TURBULENCE DETECTION Turbulence detection is an automatic function of this weather radar system. For turbulence detection and evaluation use the following procedure: 1. System Control: 1 or 2 (dual system) or 1 (single system) 2.
IntuVue RDR-4000 Weather Radar Pilot's Guide PREDICTIVE HAIL AND LIGHTNING (Hazard Display Feature) If the Hazard Display Configuration of the radar system is installed, icons will be displayed on top of the reflectivity to identify areas that have the signature characteristics of hail, lightning, or both.
IntuVue RDR-4000 Weather Radar Pilot's Guide REACT (Hazard Display Feature) REACT stands for Rain Echo Attenuation Compensation Technique. As the transmitted radar signal travels through heavy rain it loses power, or becomes attenuated. If this attenuation is severe enough, weather behind a storm cell may not be detectable, or it may be displayed as being less severe than it actually is (e.g., green instead of yellow).
IntuVue RDR-4000 Weather Radar Pilot's Guide WX/TURB-AHEAD ALERTING (Hazard Display Feature) The objective of the Weather/Turbulence Ahead alert is to let the pilot know when significant weather or turbulence is detected on the flight plan trajectory. When installed, this feature will: ...
IntuVue RDR-4000 Weather Radar Pilot's Guide PREDICTIVE WINDSHEAR (PWS) DETECTION The predictive windshear feature detects the presence of windshear up to 5 nm ahead of the aircraft, giving 10 to 60 seconds of warning before the encounter. Windshear detection mode operates automatically below 1,800 ft Above Ground Level (AGL), with alerts available at 1,500 ft AGL and below.
IntuVue RDR-4000 Weather Radar Pilot's Guide ADVISORY ALERTS The Advisory Alert region is ±40° from the aircraft track and from 0.5 nm to 5.0 nm in front of the aircraft. Between 50 ft and 1,500 ft AGL the system indicates ADVISORY Alerts by overlaying the windshear icon(s) on the radar display.
IntuVue RDR-4000 Weather Radar Pilot's Guide TAKE-OFF ALERT REGIONS WINDSHEAR TAKE-OFF ALERT REGIONS WINDSHEAR APPROACH ALERT REGIONS WINDSHEAR APPROACH ALERT REGIONS Expanded Operating Instructions D201002000008 Rev 1, December 2014...
IntuVue RDR-4000 Weather Radar Pilot's Guide ICON DISPLAY WINDSHEAR ICONS WITH SEARCH LINES The windshear icon shown on the display represents the location of the event in both range and azimuth. In the left example, the windshear event begins about 2 nm ahead and 25° to the right of the aircraft.
IntuVue RDR-4000 Weather Radar Pilot's Guide WEATHER ANALYSIS ELEVATION WEATHER MODE Elevation Weather Mode (ELEVN) provides a means to assess storm cell height and development by providing selectable altitude slices. These slices from the 3D memory are corrected for the curvature of the earth, providing a view at a constant altitude level.
IntuVue RDR-4000 Weather Radar Pilot's Guide FULL COVERAGE GROUND MAP MODE (MAP) The RDR-4000 Weather Radar System can be used in Ground Map mode to identify terrain features. For ground mapping use the following procedure: 1. System Control: 1 or 2 (dual system) or 1 (single system) 2.
IntuVue RDR-4000 Weather Radar Pilot's Guide RDR-4000 SEATTLE AREA MAP DISPLAY SEATTLE AREA SATELLITE IMAGE (Picture from earth.google.com) Expanded Operating Instructions D201002000008 Rev 1, December 2014...
IntuVue RDR-4000 Weather Radar Pilot's Guide GAIN CONTROL (GAIN) GAIN control is active in all modes. The calibrated (AUTO) position is the only position where the colors represent the FAA defined reflectivity and rainfall rates as shown in the table below. The AUTO gain setting provides a standard reference which all radar manufacturers must follow.
IntuVue RDR-4000 Weather Radar Pilot's Guide Reducing the gain can also help identify embedded storm cells within the stratus rain. It can help identify areas of significant attenuation by making radar shadows more prominent. Areas of missing terrain returns in MAP mode that correspond...
IntuVue RDR-4000 Weather Radar Pilot's Guide SECTION 4: EQUIPMENT DESCRIPTION UNIT DESCRIPTIONS RP-1 RADAR PROCESSOR The Radar Processor contains the electronics necessary to process the radar data received from the transmitter/receiver, control the modes of the radar and to format the radar data for display.
IntuVue RDR-4000 Weather Radar Pilot's Guide CP-2B CONTROL PANELS The CP-2B contains all controls for operating the radar system except those located on display units or electronic flight display control panels. The CP-2B is used in both single and dual system configurations.
IntuVue RDR-4000 Weather Radar Pilot's Guide OPERATING CONTROLS While the radar can be turned off completely by setting the System Control Switch to OFF, this is not recommended. The radar operates by continuously scanning the whole sky in front of the aircraft, and saving the results in 3-D memory.
IntuVue RDR-4000 Weather Radar Pilot's Guide TURB CONTROL On control panels with a TURB switch, pull the switch out first, then move it to the desired location. On control panels with a TURB pushbutton, push the button to engage. Push it again to disengage the feature. A light will indicate when the feature is active.
IntuVue RDR-4000 Weather Radar Pilot's Guide DISPLAY SELECTION OFF – When the Display Selection Knob is in the OFF position, no radar display is shown. If a windshear event should occur, the ALL/ALL WX weather mode will be shown, with the windshear icon(s) overlaid.
IntuVue RDR-4000 Weather Radar Pilot's Guide ELEVATION CONTROL ELEVN – Controls weather analysis altitude from 0 to 60,000 ft in increments of 1,000 ft. Selected altitude is shown on the Electronic Flight Display. If the pilot’s altitude setting is set to Standard Altitude, the display will indicate the Flight Level (FL) of the depicted weather slice.
IntuVue RDR-4000 Weather Radar Pilot's Guide DISPLAY ANNUNCIATIONS Actual annunciations are display dependent. The following figure is provided as an example only. Gain: MAN GAIN Or (blank) Mode: WX ALL PATH WX ELEVN PWS SCAN Elevation: XX000 FT FL XXX...
IntuVue RDR-4000 Weather Radar Pilot's Guide DISPLAY COLORS WEATHER RADAR DISPLAY COLORS FAULT ANNUNCIATIONS Fault annunciations alert the pilot that the radar system is not performing to established standards. Built-in test equipment (BITE) automatically and constantly tests the radar system. If a system failure occurs, a generic WXR FAIL message will be annunciated on the display.
IntuVue RDR-4000 Weather Radar Pilot's Guide Example of Fault Annunciations Display Annunciation Failure Radar Processor (RP-1) or WXR R/T Transmitter/Receiver (TR-1) Unit Failure WXR ANT Antenna Drive Failure WXR CTL Control Panel Fault WXR RNG Display Fault PRED W/S Predictive Windshear Inop See the aircraft installation documentation for complete descriptions of the possible failure modes.
IntuVue RDR-4000 Weather Radar Pilot's Guide SECTION 5: PRINCIPLES OF WEATHER RADAR USE WEATHER RADAR PRINCIPLES Airborne weather avoidance radar, as its name implies, is for avoiding severe weather - not for penetrating it. Whether to fly into an area of radar echoes depends on echo intensity, spacing between the echoes, and the capabilities of both pilot and aircraft.
IntuVue RDR-4000 Weather Radar Pilot's Guide STORM CELL CHARACTERISTICS Airborne weather radar allows pilots to identify and avoid potential weather hazards. The radar performs signal processing to estimate the radar reflectivity of the weather ahead. Reflectivity correlates to precipitation rate, and is displayed as green (light), yellow (moderate), or red (heavy) precipitation.
IntuVue RDR-4000 Weather Radar Pilot's Guide STRATIFORM WEATHER In addition to reflectivity associated with convective weather, the radar will typically display reflectivity associated with stratus, or stratiform, weather. Whereas convection is characterized by localized towers with updraft and downdraft features, stratiform precipitation results from much more widespread and much less vigorous uplift.
IntuVue RDR-4000 Weather Radar Pilot's Guide PLANNING A PATH Remember to plan a deviation path early. Simply skirting the red or magenta portion of a cell is not enough. Wherever possible, plan an avoidance path for all weather echoes which appear beyond 100 nm since this indicates they are quite dense.
IntuVue RDR-4000 Weather Radar Pilot's Guide PATH PLANNING CONSIDERATIONS Where possible, any indicated reflectivity should be avoided. Reflectivity may generally be penetrated if the crew is sure that the reflectivity is associated with stratus (non-convective) rainfall. Stratus rainfall is characterized by widespread, relatively uniform reflectivity, with tops often below 25,000 ft, and with little or no indication of turbulence.
IntuVue RDR-4000 Weather Radar Pilot's Guide areas where the REACT field is shown, expect the possibility of additional weather that may need to be avoided. Generally, consider cells with any magenta turbulence and hail icons as the most hazardous cells, then in order of decreasing severity: ...
IntuVue RDR-4000 Weather Radar Pilot's Guide AZIMUTH RESOLUTION Azimuth resolution is a function of the beam width. When two targets are closely adjacent in azimuth and at the same range, the radar may display them as a single target. However, as the targets are approached they appear to separate.
IntuVue RDR-4000 Weather Radar Pilot's Guide SHADOWED AREAS Extremely heavy rainfall or high terrain can reduce the ability of the radar to penetrate and present a full picture of the weather area. This is called radar attenuation. Use MAP mode along with the weather modes to identify areas of shadowing.
IntuVue RDR-4000 Weather Radar Pilot's Guide EFFECTS OF INTERFERING RF SOURCES An interfering radio frequency (RF) source operating at a frequency close to the radar’s operating frequency can create unusual returns on the display. The interference may appear as occasional isolated dots, or as radial spikes of any color (including magenta) on the display.
IntuVue RDR-4000 Weather Radar Pilot's Guide This figure shows a zoomed-in view of the near-range interference from the previous figure. In this figure, the interference is a bit more subtle, as it is mixed in with real weather. However, a close look reveals several radial spokes. The two most obvious ones have been circled.
IntuVue RDR-4000 Weather Radar Pilot's Guide These figures show more examples of RF interference. D201002000008 Principles of Weather Radar Use Rev 1, December 2014...
IntuVue RDR-4000 Weather Radar Pilot's Guide RADAR WINDSHEAR DETECTION During both takeoff and landing, microbursts have been the cause of numerous transport aircraft accidents. WINDSHEAR/MICROBURST DESCRIPTION A microburst is a cool shaft of air, like a cylinder, between ½ and 1½ nm across that is moving downward.
IntuVue RDR-4000 Weather Radar Pilot's Guide WINDSHEAR AVOIDANCE FLYING The air shaft of a microburst creates problems for aircraft for two reasons. The first problem is due to the downward air movement. Since the aircraft is flying within the air mass, as the air mass plummets earthward, so does the aircraft.
IntuVue RDR-4000 Weather Radar Pilot's Guide SECTION 6: RDR-4000 TECHNICAL OPERATION 3D VOLUMETRIC MEMORY SCANNING/PROCESSING The RDR-4000 collects a complete 3D volumetric scan of all the weather and terrain ahead of the aircraft. The RDR-4000 contains an internal worldwide terrain database, enabling it to extract ground clutter without the significant losses associated with signal-based ground clutter suppression techniques.
IntuVue RDR-4000 Weather Radar Pilot's Guide Views are no longer limited to the single diagonal slice that is inherent to conventional radars. The standard horizontal view of the radar represents a weather envelope based on flight path slope, and corrected for the curvature of the earth. Horizontal views are generated independently for each side of the cockpit.
IntuVue RDR-4000 Weather Radar Pilot's Guide The following pictures demonstrate some of the improved features of the RDR-4000 Weather Radar System. CONVENTIONAL RADAR RDR-4000 IMPROVED CLUTTER REJECTION / ENHANCED WEATHER PRESENTATION IMPROVED CLUTTER REJECTION/ENHANCED WEATHER PRESENTATION (ALBUQUERQUE ~70 NM, RIGHT OF TRACK) ON PATH WEATHER VS.
IntuVue RDR-4000 Weather Radar Pilot's Guide The separation is done by applying an envelope around the intended flight path: weather within the envelope is considered on path weather; weather outside the envelope is off path weather. On the display, off path weather is distinguished from on path weather by black stripes (see illustration on page 34).
IntuVue RDR-4000 Weather Radar Pilot's Guide WEATHER ANALYSIS MODE: CONSTANT ELEVATION Constant elevation mode is an analysis mode providing a constant elevation slice throughout the entire 180-degree plan view. It is called constant elevation because the elevation slice extracted from the memory is corrected for the earth’s curvature.
IntuVue RDR-4000 Weather Radar Pilot's Guide The example below demonstrates the constant elevation mode. In the top center picture the system is in the ALL/ALL WX mode at an aircraft altitude of 20,000 ft MSL. In the second center picture, ELEVN mode has been selected, so this is an elevation slice at the current aircraft altitude (20,000 ft MSL).
IntuVue RDR-4000 Weather Radar Pilot's Guide APPENDIX SAFETY INFORMATION CAUTION MAINTAIN PRESCRIBED SAFE DISTANCE WHEN STANDING IN FRONT OF A RADIATING ANTENNA.* *Reference FAA Advisory Circular #20-68B D201002000008 Appendix Rev 1, December 2014...
IntuVue RDR-4000 Weather Radar Pilot's Guide MAXIMUM PERMISSIBLE EXPOSURE LEVEL (MPEL) FAA advisory circular AC 20-68B defines the method for determining the MPEL boundary. All personnel should remain beyond the distance indicated in the illustration below. Manufacturers are required to calculate two distances;...