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The Antenna Unit The APN-242 Antenna Unit consists of a flat plate arrayand mounting pedestal and uses the existing APN-59installation and mounting brackets. The array elementimproves target detection ranges and is electronicallycontrolled to permit instantaneous fan/pencil beamswitching. The antenna rotates freely through 360º and isconnected to existing aircraft attitude reference systems toprovide antenna stabilization throughout the normalrange of aircraft maneuvers. High reliability is achievedthrough the elimination of all gears, improving antennaMTBF by a factor of fifty.
The Receiver/Transmitter The APN-242 Receiver/Transmitter uses a lower powersolid state design, a low-noise receiver and a three to onecomponent reduction to improve system performance andgreatly increase reliability. Transmit power is generated bya 10,000 hour service life state-of-the-art magnetron withdigitally controlled pulse width, pulse repetition rates,intermediate frequency (IF) and video amplification,mode switching and built-in-test (BIT).
The Display GroupThe ASN-165 Display Group provides a vivid color ormonochrome radar image in ambient lighting. Thesehigh resolution displays are overlaid with aircraftnavigation data such as true heading, ground speed andtrack angle error. A latitude/longitude stabilized cursor isprovided to aid drop zone and waypoint identification.Depending on the aircraft mission design series, datafrom the station keeping equipment (SKE), self-containednavigation system (SCNS) and traffic collision avoidancesystem (TCAS) can be integrated and displayed. In thegreen mode, the displays are night vision gogglecompatible.
AN/APN-242 Color Weather & Navigation Radar Sperry Marine
Weather Detection and AvoidanceDetects weather with full color, black andwhite, or green displays of storms out to240NM.
Terrain Mapping and Navigation High resolution ground mapping mode withlatitude/longitude stabilized electronic cursorto provide range and azimuth information towaypoint.
Aircraft Detection Skin paints fighter aircraft at extended rangesthrough intervening rain showers concurrentwith other operating modes.
Beacon and IFF Interrogation Detects airborne and ground beacons andoptionally interrogates IFF equipped aircraftout to 100NM.
Dramatically Improved System Mean-Time Between Failure Rate As APN-59 systems age, radar failures arebecoming a leading cause of C-130 and C-135 aircraft downtime. Today’s APN-242 hashalf the number of line replaceable units(LRUs) and greater than an order ofmagnitude improvement in system mean-time between failures (MTBF).
Field Installation By Unit LevelMaintenance In A DayNo depot required. APN-242 can be installedusing existing radar cabling, connectionsand mounts without aircraft modification.
Pays for itselfFrom operations and maintenance (O&M)savings.
In production Off the shelf and in inventory for immediatedeliveries.
AntennaSubsystem
StabilizationData Generator
Stabilization FromAircraft System
New AntennaInterface Box
(Fits ECA Location)
New ReceiverTransmitter
(Fits Same Location)
New Video Processor(Fits PP1073 Location)
New Pilot’s Display(Fits Same Location)
MIL-STD-1553B &Analog Interfaces(Overlays & Other
System Inputs)
New Radar/NAVControl Panel
▼
▼
▼
▼▼
▼
▼
▼
▼
▼
▼
▼
▼
New NavigatorAzimuth-Range
Indicator (Fits Same Location)
New Antenna(Fits Same Location)
Radar ReceiverTransmitter
Fans
Radar SetControl
AntennaControl
Azimuth-RangeIndicator (Pilot)
Power Supply
Power Supply Azimuth-RangeIndicator (Navigator)
SynchronizerControl
ElectronicSynchronizer
Control & Display Subsystem
ElectronicMarker
GeneratorGenerator
ControlTo Nav
Computer
Antenna▼
▼
▼
▼
▼ ▼▼ ▼
▼ ▼
▼
▼
▼
Previous Configuration: APN-59
APN-242 Modes of Operation
Today’s Consolidated Configuration: APN-242
APN-59E/F APN-242
System MTBF Under 100 Hours Greater than 1000 hoursWeight 244 lbs. 205 lbs.Power Consumption 1600W 800WAntenna Beam Switching Mechanical Electronic (Instantaneous)Antenna Stabilization Internal Gyro Inertial Reference SystemCooling External Fans None RequiredDaylight Viewable
Non-Fade Display None StandardElectronic Cursor with
Integrated Graphics Overlay None StandardColor Weather Contour Map None StandardBuilt-In Test None Standard
Form, Fit and Function Replacement for the APN-59 Radar
In Production For USAF
Coastal Navigation Weather and Storm Center Detection
Enhanced Terrain Mapping
Aircraft Detection RC-135
All screens are actual video capture from cockpit videotape
Beacon and IFF Interrogation
The Antenna Unit The APN-242 Antenna Unit consists of a flat plate arrayand mounting pedestal and uses the existing APN-59installation and mounting brackets. The array elementimproves target detection ranges and is electronicallycontrolled to permit instantaneous fan/pencil beamswitching. The antenna rotates freely through 360º and isconnected to existing aircraft attitude reference systems toprovide antenna stabilization throughout the normalrange of aircraft maneuvers. High reliability is achievedthrough the elimination of all gears, improving antennaMTBF by a factor of fifty.
The Receiver/Transmitter The APN-242 Receiver/Transmitter uses a lower powersolid state design, a low-noise receiver and a three to onecomponent reduction to improve system performance andgreatly increase reliability. Transmit power is generated bya 10,000 hour service life state-of-the-art magnetron withdigitally controlled pulse width, pulse repetition rates,intermediate frequency (IF) and video amplification,mode switching and built-in-test (BIT).
The Display GroupThe ASN-165 Display Group provides a vivid color ormonochrome radar image in ambient lighting. Thesehigh resolution displays are overlaid with aircraftnavigation data such as true heading, ground speed andtrack angle error. A latitude/longitude stabilized cursor isprovided to aid drop zone and waypoint identification.Depending on the aircraft mission design series, datafrom the station keeping equipment (SKE), self-containednavigation system (SCNS) and traffic collision avoidancesystem (TCAS) can be integrated and displayed. In thegreen mode, the displays are night vision gogglecompatible.
AN/APN-242 Color Weather & Navigation Radar Sperry Marine
Weather Detection and AvoidanceDetects weather with full color, black andwhite, or green displays of storms out to240NM.
Terrain Mapping and Navigation High resolution ground mapping mode withlatitude/longitude stabilized electronic cursorto provide range and azimuth information towaypoint.
Aircraft Detection Skin paints fighter aircraft at extended rangesthrough intervening rain showers concurrentwith other operating modes.
Beacon and IFF Interrogation Detects airborne and ground beacons andoptionally interrogates IFF equipped aircraftout to 100NM.
Dramatically Improved System Mean-Time Between Failure Rate As APN-59 systems age, radar failures arebecoming a leading cause of C-130 and C-135 aircraft downtime. Today’s APN-242 hashalf the number of line replaceable units(LRUs) and greater than an order ofmagnitude improvement in system mean-time between failures (MTBF).
Field Installation By Unit LevelMaintenance In A DayNo depot required. APN-242 can be installedusing existing radar cabling, connectionsand mounts without aircraft modification.
Pays for itselfFrom operations and maintenance (O&M)savings.
In production Off the shelf and in inventory for immediatedeliveries.
AntennaSubsystem
StabilizationData Generator
Stabilization FromAircraft System
New AntennaInterface Box
(Fits ECA Location)
New ReceiverTransmitter
(Fits Same Location)
New Video Processor(Fits PP1073 Location)
New Pilot’s Display(Fits Same Location)
MIL-STD-1553B &Analog Interfaces(Overlays & Other
System Inputs)
New Radar/NAVControl Panel
▼
▼
▼
▼▼
▼
▼
▼
▼
▼
▼
▼
▼
New NavigatorAzimuth-Range
Indicator (Fits Same Location)
New Antenna(Fits Same Location)
Radar ReceiverTransmitter
Fans
Radar SetControl
AntennaControl
Azimuth-RangeIndicator (Pilot)
Power Supply
Power Supply Azimuth-RangeIndicator (Navigator)
SynchronizerControl
ElectronicSynchronizer
Control & Display Subsystem
ElectronicMarker
GeneratorGenerator
ControlTo Nav
Computer
Antenna▼
▼
▼
▼
▼ ▼▼ ▼
▼ ▼
▼
▼
▼
Previous Configuration: APN-59
APN-242 Modes of Operation
Today’s Consolidated Configuration: APN-242
APN-59E/F APN-242
System MTBF Under 100 Hours Greater than 1000 hoursWeight 244 lbs. 205 lbs.Power Consumption 1600W 800WAntenna Beam Switching Mechanical Electronic (Instantaneous)Antenna Stabilization Internal Gyro Inertial Reference SystemCooling External Fans None RequiredDaylight Viewable
Non-Fade Display None StandardElectronic Cursor with
Integrated Graphics Overlay None StandardColor Weather Contour Map None StandardBuilt-In Test None Standard
Form, Fit and Function Replacement for the APN-59 Radar
In Production For USAF
Coastal Navigation Weather and Storm Center Detection
Enhanced Terrain Mapping
Aircraft Detection RC-135
All screens are actual video capture from cockpit videotape
Beacon and IFF Interrogation
The Antenna Unit The APN-242 Antenna Unit consists of a flat plate arrayand mounting pedestal and uses the existing APN-59installation and mounting brackets. The array elementimproves target detection ranges and is electronicallycontrolled to permit instantaneous fan/pencil beamswitching. The antenna rotates freely through 360º and isconnected to existing aircraft attitude reference systems toprovide antenna stabilization throughout the normalrange of aircraft maneuvers. High reliability is achievedthrough the elimination of all gears, improving antennaMTBF by a factor of fifty.
The Receiver/Transmitter The APN-242 Receiver/Transmitter uses a lower powersolid state design, a low-noise receiver and a three to onecomponent reduction to improve system performance andgreatly increase reliability. Transmit power is generated bya 10,000 hour service life state-of-the-art magnetron withdigitally controlled pulse width, pulse repetition rates,intermediate frequency (IF) and video amplification,mode switching and built-in-test (BIT).
The Display GroupThe ASN-165 Display Group provides a vivid color ormonochrome radar image in ambient lighting. Thesehigh resolution displays are overlaid with aircraftnavigation data such as true heading, ground speed andtrack angle error. A latitude/longitude stabilized cursor isprovided to aid drop zone and waypoint identification.Depending on the aircraft mission design series, datafrom the station keeping equipment (SKE), self-containednavigation system (SCNS) and traffic collision avoidancesystem (TCAS) can be integrated and displayed. In thegreen mode, the displays are night vision gogglecompatible.
AN/APN-242 Color Weather & Navigation Radar Sperry Marine
Weather Detection and AvoidanceDetects weather with full color, black andwhite, or green displays of storms out to240NM.
Terrain Mapping and Navigation High resolution ground mapping mode withlatitude/longitude stabilized electronic cursorto provide range and azimuth information towaypoint.
Aircraft Detection Skin paints fighter aircraft at extended rangesthrough intervening rain showers concurrentwith other operating modes.
Beacon and IFF Interrogation Detects airborne and ground beacons andoptionally interrogates IFF equipped aircraftout to 100NM.
Dramatically Improved System Mean-Time Between Failure Rate As APN-59 systems age, radar failures arebecoming a leading cause of C-130 and C-135 aircraft downtime. Today’s APN-242 hashalf the number of line replaceable units(LRUs) and greater than an order ofmagnitude improvement in system mean-time between failures (MTBF).
Field Installation By Unit LevelMaintenance In A DayNo depot required. APN-242 can be installedusing existing radar cabling, connectionsand mounts without aircraft modification.
Pays for itselfFrom operations and maintenance (O&M)savings.
In production Off the shelf and in inventory for immediatedeliveries.
AntennaSubsystem
StabilizationData Generator
Stabilization FromAircraft System
New AntennaInterface Box
(Fits ECA Location)
New ReceiverTransmitter
(Fits Same Location)
New Video Processor(Fits PP1073 Location)
New Pilot’s Display(Fits Same Location)
MIL-STD-1553B &Analog Interfaces(Overlays & Other
System Inputs)
New Radar/NAVControl Panel
▼
▼
▼
▼▼
▼
▼
▼
▼
▼
▼
▼
▼
New NavigatorAzimuth-Range
Indicator (Fits Same Location)
New Antenna(Fits Same Location)
Radar ReceiverTransmitter
Fans
Radar SetControl
AntennaControl
Azimuth-RangeIndicator (Pilot)
Power Supply
Power Supply Azimuth-RangeIndicator (Navigator)
SynchronizerControl
ElectronicSynchronizer
Control & Display Subsystem
ElectronicMarker
GeneratorGenerator
ControlTo Nav
Computer
Antenna▼
▼
▼
▼
▼ ▼▼ ▼
▼ ▼
▼
▼
▼
Previous Configuration: APN-59
APN-242 Modes of Operation
Today’s Consolidated Configuration: APN-242
APN-59E/F APN-242
System MTBF Under 100 Hours Greater than 1000 hoursWeight 244 lbs. 205 lbs.Power Consumption 1600W 800WAntenna Beam Switching Mechanical Electronic (Instantaneous)Antenna Stabilization Internal Gyro Inertial Reference SystemCooling External Fans None RequiredDaylight Viewable
Non-Fade Display None StandardElectronic Cursor with
Integrated Graphics Overlay None StandardColor Weather Contour Map None StandardBuilt-In Test None Standard
Form, Fit and Function Replacement for the APN-59 Radar
In Production For USAF
Coastal Navigation Weather and Storm Center Detection
Enhanced Terrain Mapping
Aircraft Detection RC-135
All screens are actual video capture from cockpit videotape
Beacon and IFF Interrogation
Sperry Marine
AN/APN-242Color Weather & Navigation Radar
Sperry Marine
©Northrop Grumman Electronic Systems — Sperry Marine BR-0019B • 2M • 9/02 Printed in U.S.A.
Over 400 Locations Worldwide
www.sperry-marine.comFor more information, please contact:Sperry Marine
USA1070 Seminole TrailCharlottesville, VA 22901-2891 USAPh: +1 434-974-2000Fax: +1 434-974-2259ISO 9001
Sperry Marine
AC-130
C-130H
C-130E
WC-130
KC-135R
MC-130P
MOUNTING SURFACE
Operating ParametersFrequencies Radar operation: X-band 9375 ±10
MHz; beacon reception 9310 MHzTransmitted Power 25 kW nominal peak (new high
reliability magnetron)Receiver Noise Figure 6.5 db nominalRange Scale 2.5 to 20 (2.5 NM increments), 25,
30, 50, 100 and 240 NMPulse Length Multiple lengths (0.2, 0.8, 2.35 and
4.5 microseconds), automaticallyselected for different ranges andfunctions
Pulse Repetition Frequency .2 µsec @ 1024 Hz.8 µsec @ 350 Hz
2.35 µsec@ 350 Hz4.5 µsec @ 180 Hz
Scanning Features 360-degree scan rates: 12 rpm onlong range functions; 45 rpm onshort range functionsSector scan: approximately 90degrees centered about forwardposition
Antenna Beam Selection Pencil or fan beam, both with 3-degree azimuth beamwidth andinstantaneous electronic switching
Antenna Stabilization Stabilized to existing aircraftreference throughout a range of±15 degrees pitch and ±30 degreesroll
Navigation Features Manual electronic cursor withlatitude/longitude or range/bearingreadout; latitude/longitudestabilized for fly to waypointcapability
Maximum Operating Conditions
Operating Temperature (Internal Equipment)Parameter Normal OperationNavigator & Pilot Indicators -15 to +55° CAntenna Interface Unit -55 to +55° CVideo Processor -40 to +55° CReceiver/Transmitter &Antenna Operating Temperature -55 to +55° CStorage Temperature -57 to +85° CAircraft Altitude (Uninhabited) -1,500 to 50,000 feetCabin Pressure (Inhabited) 0 to 8,000 feetMaximum Level Flight Speed 400 knots EASVertical Speed ± 1,500 ft/minPitch Angle ± 15°Bank Angle ± 30° (stabilized)
± 60° (unstabilized)
LRU Weight/SizeUnit Dimensions WeightAntenna 35.8 x 35.8 x 34.0 in 69.0 lbs
908.0 x 908.0 x 864.0 mm 31.4 kgAntenna Interface 6.5 x 5.5 x 10.7 in 7.0 lbs
165.0 x 140.0 x 272.0 mm 3.2 kgReceiver/Transmitter 15.3 in dia. 15.1 in ht. 65.0 lbs
387.0 mm dia., 384.0 mm ht. 29.5 kgVideo Processor 7.75 x 7.75 x 12.3 in 25.0 lbs
197.0 x 197.0 x 324.0 mm 11.3 kgPilot’s Indicator 6.5 x 6.5 x 12.0 in 12.0 lbs
165.0 x 165.0 x 305.0 mm 5.4 kgNavigator’s Indicator 8.5 x 10.0 x 12.8 in 21.0 lbs
216.0 x 254.0 x 323.0 mm 9.5 kgNavigator’s Control 6.0 x 10.0 x 3.8 in 5.5 lbs
152.0 x 254.0 x 95.0 mm 2.5 kg
APN-242 Dimensions and Operating Parameters
35.76in/908mm
8.5 in/216mm
12.50in/318mm
18.00in/457mm
25.75in/ 654mm Max
ALL DIMENSIONS AND WEIGHTS ARE APPROXIMATE
8.29in/211mm
5.7 in/145mm
SWEEP VOLUME
RADIUS 17.88IN/454MM MAX
15.1˝ HEIGHT
15.25˝ DIAMETER