Related by context. All words. (Click for frequent words.) 66 reconnaissance 64 aerial surveillance 60 reconaissance 59 reconnaisance 59 reconnaissance missions 57 aerial reconnaissance missions 56 aerial 56 reconnaissance drones 56 reconnaissance planes 53 satellite imagery 53 Predator unmanned 53 unmanned reconnaissance aircraft 52 spotter planes 52 RNZAF Orion 51 reconnaissance aircraft 51 unpiloted drones 51 flew reconnaissance missions 51 helicopters 50 aerial overwatch 50 unmanned aerial drone 50 P3 Orion 50 Unmanned Aerial Vehicles UAVs 50 sorties 49 tactical reconnaissance 49 B 1Bs 49 inflight refueling 49 ISR Intelligence Surveillance 49 F #Es 49 Kfir jets 49 Griffon helicopters 49 recon missions 49 heliborne 49 resupply missions 49 laser altimetry 48 synthetic aperture radar 48 Dornier aircraft 48 TerraSAR X 48 ESA Envisat satellite 48 Thunderbolt IIs 48 GHMD 48 unmanned reconnaissance drones 48 Satellite imagery 48 F/A-# Hornet fighter jets 48 infrared imagery 48 GR 4s 48 SH #B helicopter 48 airdrop missions 48 minesweeping 47 RF 4C 47 Unmanned Aerial Vehicles 47 Heron unmanned aerial 47 Seaking helicopter 47 Landsat images 47 aerial photographs 47 unmanned aerial vehicle 47 aerial surveys 47 troop movements 47 Chetak helicopters 47 RAF Typhoons 47 Unmanned aerial 47 Mirage fighter jets 47 remote sensing 47 aircrews 47 CFB Comox 47 vehicles UAVs 47 unmanned aerial drones 47 RQ 4A Global 47 Tornado GR4s 47 overflights 47 thermal infrared 47 Mars orbiters 46 USS Chancellorsville 46 electro optical sensor 46 antisubmarine 46 overfly 46 unpiloted aircraft 46 Predator unmanned aerial 46 Hercules C# 46 unmanned spy 46 IAF choppers 46 blackhawk helicopters 46 Heron unmanned 46 intratheater airlift 46 UAVs 46 electro optical sensors 46 Sniper pod 46 aerial resupply 46 penetrating radar 46 MAFFS 46 reconnaissance sorties 46 unmanned Predator drone 46 unmanned aerial vehicles 46 Unmanned drones 46 hyper spectral 46 magnetic radiometric 46 unmanned surveillance 46 Oryx helicopters 46 reconnaissance satellites 46 Synthetic Aperture Radar 46 RAF Tornados 46 B 1B Lancer 46 Reconnaissance ISR 46 targeting militant hideouts 46 aerial photography 46 Marine Corps F/A-# Hornet 46 AWACS aircraft 45 bomber squadrons 45 remotely sensed 45 flybys 45 Remote sensing 45 Earth orbiting satellites 45 unmanned reconnaissance planes 45 remotely piloted aircraft 45 radar altimeter 45 reconnaissance drone 45 MQ 1B Predator 45 hyperspectral sensors 45 midair refueling 45 OSRVT 45 UH 1N Hueys 45 laser designator 45 Global Hawk 45 IAF helicopters 45 Longbow Apache 45 unmanned reconnaissance 45 gamma ray spectrometry 45 frigate HMCS Charlottetown 45 Sella Pass 45 P3 Orion maritime 45 Formosat 2 45 counterfire 45 ESA Envisat 45 satellite RISAT 45 Mirage jets 45 Yellow confetti rained 45 Predator UAV 45 #th RQW 45 TerraSAR X satellite 45 maritime interdiction operations 45 dismounted soldier 45 Aqua satellite 45 hydrographic surveys 45 hyperspectral 45 antiaircraft 45 electro optic sensors 44 twin rotor CH 44 warplanes 44 surveillance drones 44 helicopter 44 Reconnaissance 44 artillery salvos 44 polar orbiting satellites 44 unmanned Predator aircraft 44 Synthetic Aperture Radar SAR 44 Tornado GR4 aircraft 44 9 Reaper unmanned 44 Tornado F3s 44 remotely piloted drones 44 unmanned drone 44 Envisat 44 Kfirs 44 Navy F/A-#s 44 C# Hercules 44 armed overwatch 44 situ measurements 44 Marsis 44 gamma ray spectrometer 44 Twin Otter aircraft 44 laser designators 44 MQ 8B 44 UAV 44 spy satellites 44 Cartosat 2B 44 unmanned airborne 44 UGVs 44 P 3C patrol 44 Envisat satellite 44 IRST 44 Predator UAVs 44 Scud missile launchers 44 remote sensing imagery 44 unmanned aerial 44 Aerial photography 44 airforce 44 unmanned 44 escort convoys 44 Unmanned Aerial Vehicle UAV 44 Awacs 44 IKONOS satellite 43 unarmed drones 43 microscopic imager 43 heli borne 43 Cobra helicopter gunships 43 CENTAF 43 pilotless Predator 43 Minuteman IIIs 43 Aerial surveys 43 unmanned undersea 43 unmanned reconnaissance plane 43 ENVISAT 43 TRMM satellite 43 ROSAT 43 laser altimeter 43 Bob Mehal 43 recon 43 3rd MAW Fwd 43 Aircrews 43 UAVSAR 43 RAF Typhoon 43 Heron UAVs 43 VLF EM survey 43 Bell UH 1H 43 multispectral 43 VTOL UAVs 43 Aerial 43 ESA ERS 43 EOD Airmen 43 Polair helicopter 43 hydrographic survey 43 Lunar CRater Observation 43 MERIS 43 strategic airlifters 43 Huey helicopters 43 1st Fighter Wing 43 helos 43 AWACS surveillance aircraft 43 Landsat satellites 43 JSTARS 43 unmanned rotorcraft 43 MINUCI 43 Vehicles UAVs 43 Tornado reconnaissance 43 infra red camera 43 Lunar Reconnaissance Orbiter LRO 43 Commando Solo 43 Remotely operated 43 altimetry 43 PBY Catalina 43 overflight 43 SH #B Seahawk 43 Radar ASAR instrument 43 missions 43 Landsat 43 JTACs 43 aeromagnetic survey 43 Cheetah helicopters 43 airfields 43 Predator unmanned aircraft 43 mineralogical mapping 43 IKONOS satellite imagery 43 Orbiter LRO 43 Shuttle Radar Topography 43 stealth cruise missiles 43 satellite imageries 43 gradiometer 43 Elmendorf AFB Alaska 43 Skycrane 43 airdrops 43 RCCNZ 43 unmanned aircraft 43 IAI Heron 43 Landsat satellite 43 CH #D Chinook 43 Prazuck 43 Helicopter gunships 43 ELINT 43 tactical UAV 42 RAF Tornado GR4 42 Cartosat 42 view Sensor SeaWiFS 42 Sorties 42 electro optical EO 42 UASs 42 Navy P 3C 42 UNOSAT 42 Maritime Surveillance 42 Unmanned Aerial Vehicle 42 missiles torpedoes 42 JSTARS aircraft 42 overwatch 42 GPS co ordinates 42 resupply convoys 42 fighter planes 42 VUIT 2 42 synthetic aperture radars 42 Mini Synthetic Aperture 42 topographical surveys 42 AeroTEM II 42 Mission TRMM satellite 42 Spy satellites 42 AWACS airborne warning 42 clattered overhead 42 AC #H Spectre 42 STSS satellites 42 airborne reconnaissance 42 Contingency Response Group 42 #nd Fighter Squadron [002] 42 unmanned MQ 42 Harrier jets 42 remotely piloted Predator 42 aircrew 42 pilotless drones 42 air refueller 42 Aerial photographs 42 predator drones 42 Recon Optical 42 topographic surveys 42 Coastguard Helicopter 42 IFSAR 42 airbases 42 UH 1H Huey 42 deorbiting 42 Dhruvs 42 AV 8B Harrier jets 42 submarine naval frigate 42 THAAD radar 42 autonomous unmanned aerial 42 Janaka Nanayakkara 42 allied warplanes 42 uncovered weapons caches 42 MQ 1C 42 pilotless planes 42 Unmanned Aerial Vehicles UAV 42 Forward Looking Infrared 42 MQ 8B Fire 42 Spokesperson Wing Commander 42 GOES satellites 42 Base Comox 42 optronic 42 MAGTF 42 fighter bombers 42 remote sensing satellites 42 aeromagnetic surveys 42 Program DMSP 42 RPVs 42 UAVS 42 F/A-# jet 42 infantry platoons 42 RNZAF 42 airborne magnetic survey 42 Mossbauer spectrometer 42 Gorgon Stare 42 Mars orbiting spacecraft 42 Titan flybys 42 reconnaissance ISR missions 42 Pave Hawk helicopter 42 remotely piloted 42 era UH 1H 42 DigitalGlobe WorldView 42 Elbit Systems Hermes 42 amphibious assault maneuvers 42 Puma helicopters 42 waterbombing 42 spokesperson Wing Commander 42 artillery 42 Apache helicopters 42 airborne LIDAR 42 USNS Stockham 42 dropping retardant 42 Chetak helicopter 42 Envisat satellites 42 aeriel 42 battlespace awareness 42 TanDEM X 42 performing aerobatics 42 Cobra gunship 41 MC #P 41 GBU #s 41 Predator Reaper 41 Aerosonde aircraft 41 radar altimeters 41 RISAT 41 F/A-#s 41 ALHs 41 USS Ramage 41 #st Fighter Squadron [001] 41 naval ships 41 Unmanned aerial vehicles 41 Office NAVOCEANO 41 UAVs unmanned aerial 41 earth orbiting satellites 41 Lieutenant Colonel Restituto Padilla 41 WC #J 41 electronic warfare 41 UTTR 41 STARFlight 41 Navy EA #G 41 Nimrod R1 41 squadron 41 precision munitions 41 Earth Observation EO 41 tactical unmanned aerial 41 helicopter gunship 41 reusable hypersonic 41 AH 1F Cobra 41 dismounted warfighters 41 infantry 41 resupply 41 Pudukudiyirippu 41 Uninhabited Aerial Vehicle 41 P3C Orion 41 reachback 41 unmanned Predator spy 41 radiometric surveys 41 NASA Mars rovers 41 Elevation Satellite 41 ROCSAT 2 41 mortarmen 41 UUVs 41 Cobra gunships 41 Helinet Technologies 41 P 3C Orions maritime 41 Gürak 41 Epervier 41 SAREX 41 OH #D Kiowa 41 flyby 41 MODIS 41 Hind helicopter gunships 41 AWACS radar 41 helicopter gunships fighter jets 41 EO IR 41 Forward Looking Infrared FLIR 41 multi spectral 41 binoculars 41 unmanned aircrafts 41 Light Detection 41 gendarme helicopter 41 Pilotless 41 Aussavy 41 Ikonos 41 HAWCS helicopter 41 Hawkeye Geosensing 41 NATO AWACS 41 frontline Sukhoi 41 MH #S Seahawk 41 Lidar 41 multibeam sonar 41 Valiant Strike 41 Cobra helicopters 41 UAVs Unmanned Aerial Vehicles 41 ScanEagle UAV 41 Tom LaPuzza spokesman 41 Cargo Launch Vehicle 41 maritime interdiction 41 P 3C aircraft 41 Project Wedgetail 41 nautical charting 41 REMUS 41 spy drones 41 Brigadier Hannan 41 Mounted Warrior 41 Aerial Vehicles 41 laser guided munitions 41 Bullets pinged 41 Operation Meghdoot 41 geophysical survey 41 antiship missiles 41 NorthCom 41 PLAAF 41 Mobs swarm below 41 PTDS 41 Navy F/A-#C Hornet 41 Mars landers 41 SIGINT 41 thermal imaging 41 Bagotville Que 41 sidescan 41 AWACS planes 41 DigitalGlobe QuickBird 41 flypasts 41 drones 41 Nasa Mars Reconnaissance 41 Cartosat 2A 41 VTEM airborne 41 CH #D 41 Mirages 41 night vision goggles 41 waterbombers 41 Intercontinental Ballistic Missiles 41 Advanced Synthetic Aperture 41 Minotaur rocket 41 amphibious assaults 41 CFB Bagotville 41 droned overhead 41 noncombatant evacuation operations 41 missile destroyers 41 Ground penetrating radar 41 Blackhawk helicopters 41 Attack Helicopter 41 Boeing AH #D 41 overflying 41 paratroopers 41 C# Hercules transport 40 Tactical Trainer 40 NH# helicopters 40 MiG jets 40 Kfir bombers 40 Aerial refueling 40 AH #D 40 minehunting 40 AH #D Longbow Apache 40 ground truthing 40 Apache helicopter gunship 40 pilotless surveillance 40 SRTM 40 Longbows 40 guided munition 40 Alouette III 40 Firefighting helicopters 40 Natasha Aeriel Terrance 40 spaceborne 40 Lunar Orbiter 40 airborne radiometric survey 40 advanced geospatial imagery 40 gamma ray detectors 40 unmanned MQ 1 40 NFIRE 40 RADARSAT 40 Inertial Navigation System 40 Kamov helicopters 40 satellite imagery aerial 40 DMSP satellites 40 optionally manned 40 multirole aircraft 40 uncrewed 40 helicopter gunships 40 Induced Polarization Resistivity 40 dummy warheads 40 intelligence SIGINT 40 UUV 40 #st MEU 40 WISE infrared 40 Tropical Rainfall Measuring 40 Rivet Joint 40 de confliction 40 Unmanned aircraft 40 Rapid Deployment Force 40 AN/TPY-2 40 B1 bombers 40 Hawk unmanned aerial 40 Northrop Grumman MQ 8B 40 CBERS 2B 40 Eurocopters 40 Infrared Mapping Spectrometer VIMS 40 EA 6B 40 fly bys 40 CH# Chinook 40 aboard ESA Envisat 40 Beale AFB 40 topographic mapping 40 Combat Talon 40 echo sounders 40 AWACS airborne surveillance 40 Vehicle UAV 40 Metop 40 tactical airlift 40 F/A-# Hornet jets 40 naval frigate 40 train bombardiers 40 pararescuemen 40 reconnoiter 40 Watchkeeper UAV 40 antiaircraft guns 40 spokesman Christophe Prazuck 40 sensor payloads 40 MAVs 40 vertical envelopment 40 АFР correspondent 40 sortie 40 overflight observations 40 EC #J 40 HH #C 40 AH 1W Cobra 40 Mi 8T 40 detailed geological mapping 40 P3C Orion maritime 40 Vandenberg AFB Calif. 40 coca fumigation 40 M# howitzers 40 Kodori Valley 40 Strike Eagle 40 Reconnaissance Squadron 40 #nd Fighter Squadron [001] 40 paratroops 40 CARTOSAT 40 thruster firings 40 Interferometric Synthetic Aperture Radar 40 Doolittle Raid 40 penetrating radars 40 Satellite Imagery 40 Al Faw Peninsula 40 IMD HUMS 40 Blackhawk helicopter 40 Submarine Launched 40 turntable ladders 40 artillery gunners 40 Hercules transporter 40 F/A-# Hornet fighter 40 EOD Explosive Ordnance Disposal 40 patrols 40 orthorectified 40 Molczan 40 Kiowas 40 intratheater 40 Overflights 40 U 2s 40 Clementine spacecraft 40 F 4s 40 lightweight synthetic aperture 40 GR 7s 40 RQ 4B Global 40 Quick Reaction Forces 40 fighter jets 40 radars 40 rover panoramic 40 sonars 40 RADARSAT 2 40 Jebel Moon 40 waterbombing aircraft 40 COSMO SkyMed 40 Dorniers 40 airborne LiDAR 40 Musudan 40 scatterometer 40 TUAV 40 F #A [001] 40 SEAL commandos 40 Gazelle helicopters 40 hovered overhead 40 spokesman Constantin Spanu 40 Radar ASAR 40 SUAV 40 Mars Orbiter Camera 40 La Foudre 40 Patriot antimissile 40 Reflection Radiometer 40 Task Force ODIN 40 EP 3E 40 aircraft overflying 40 GR4 40 AVHRR 40 SBSS satellite 40 aerial gunner 40 APXS 40 backburns 40 Insat 4B 40 Viking Lander 40 enemy emplacements 40 InSAR 40 geosynchronous orbits 40 Dongchang ri 40 THEMIS satellites 40 unmanned probes 40 Spitzer infrared 40 Griffon helicopter 40 ExoMars rover 40 Firefinder 40 Alexander Drobyshevsky 40 HRSC 40 warships 40 Shenzhou spaceships 40 Yeovilton Somerset 40 medevac missions 40 panchromatic camera 40 ISTAR 40 Black Hawk choppers 40 MRH# 40 apache helicopter 40 Express orbiter 40 unmanned predator drones 40 MONUSCO 40 airborne drones 40 preflight briefing 40 naval vessels 40 Predator unmanned drone 40 inertial navigation system 40 counterdrug missions 40 arial 40 Aegis cruisers 40 Maj. Gen. Ido Nehushtan 40 gyro stabilized 40 orbiting Hubble Space Telescope 40 interferometric synthetic aperture radar 40 ADF NALU 40 NASA Landsat 40 unmanned Predator drones 40 Field Artillery Tactical 40 Sécurité Civile 40 Moderate Resolution Imaging 40 TCG Giresun 40 USVs 40 AWACS 40 EP 3E aircraft 40 Navy F/A-# Hornet 40 med evac 40 CAMCOPTER S 39 Aegis warships 39 infrared scopes 39 Landsat imagery 39 ESO telescopes 39 Orions 39 AV 8B Harriers 39 AH 1W Super 39 RC #S 39 AN/TPQ-# 39 NVGs 39 #st Fighter Squadron [002] 39 Skymed 39 LEOP 39 Rescue SAR 39 panoramic camera 39 3rd MarDiv 39 Airforce Orion 39 3K Orion 39 Aerojet propulsion 39 RAF Tornado 39 helicoper 39 airborne radiometric magnetic 39 orthophoto 39 peackeeping 39 gunships 39 FARP 39 multispectral imagery 39 RAF GR 39 Iranamadu 39 Moessbauer spectrometer 39 F #As [001] 39 #rd Maintenance Squadron 39 IRGC naval 39 Harrier squadron 39 Geotech Airborne Limited 39 dropsondes 39 Licorne Unicorn 39 Stealth bombers 39 antisubmarine warfare 39 #nd MEU 39 Kassam rocket launchers 39 Drobyshevsky 39 near Qarraya 39 commanders bird's eye 39 polarimetric 39 KC #J tankers 39 Hohenfels Germany 39 Cormorant helicopters 39 allied navies 39 exfiltration 39 Climate Experiment GRACE 39 Joint STARS 39 AN/TPY-2 radar 39 Chinook helicopters 39 FPUs 39 airborne magnetics 39 amphibious warship 39 TecSAR 39 Helicopter Squadron 39 Canadair planes 39 clearing minefields 39 airborne electromagnetic survey 39 Predator drone 39 telemetry tracking 39 Cloud Aerosol Lidar 39 Forces CMF 39 NDRF personnel 39 mortar platoon 39 extinguish fires 39 Avasin Basyan region 39 Mission SRTM 39 Squadron Leader Kavae 39 mine sweepers 39 COMINT 39 Eyal Eisenberg 39 MiG fighter 39 TECSAR 39 Kepler spacecraft 39 hyperspectral imaging 39 bathymetric 39 Seungjin Fire Training 39 NASA Lunar Reconnaissance 39 Unmanned Air 39 Baghran Valley 39 Armed Forces LAF 39 Unmanned Aircraft System 39 radar scopes 39 naval armada 39 GloPac 39 Apache Longbow helicopters 39 Danish warship Absalon 39 THAAD interceptors 39 Apache helicopter gunships 39 French Mirages 39 orbiting spacecraft 39 Tornado F3 39 VIRTIS 39 helmets flak vests 39 Warthog planes 39 gun emplacement 39 F 5E jets 39 Brigadier Slater 39 reconnoitering 39 recces 39 ASAR 39 Tamil Tiger spokesman Rasiah 39 LEMV 39 Jaffna lagoon 39 Hayabusa spacecraft 39 datalinks 39 VTEM airborne survey 39 UNAMID peacekeeping force 39 unmanned reconnaissance drone 39 aerial drones 39 artillery emplacements 39 coastguard helicopter 39 X #B Unmanned 39 Apache Longbow helicopter 39 SeaWiFS 39 Quick Reaction Force 39 HITRON 39 MQ 1B 39 Alpha Particle 39 Humvee jeeps 39 MDARS 39 Brigadier Aviv Kochavi 39 ANKARA MENL Turkey 39 Peenemunde 39 TK Singha 39 STSS Demonstration 39 HC #A 39 airborne infantry 39 Heron UAV 39 MQ 4C 39 BuckEye 39 General Eliezer Shkedi 39 ICESat 39 Tarnak Farms 39 infrared telescope 39 STP S# 39 precision guided munitions 39 HMAS Toowoomba 39 MEDEVAC 39 radiosondes 39 CANSOFCOM 39 Attu Island 39 satellites 39 Brimstone missiles 39 UNHAS 39 waterbomber 39 Remotely Operated Vehicle 39 Reaper unmanned aerial 39 unmanned drones 39 searchlights circled overhead 39 Katunayake airbase 39 Envisat Advanced Synthetic Aperture 39 Chief Fali Homi 39 squadrons 39 air tankers Nisich 39 Flight Demonstration Squadron 39 Resolution Imaging Spectrometer 39 C NOFS 39 Common Sensor Payload 39 aerial bombardment 39 surveillance 39 paratroop 39 Superfortresses 39 Hu Jui chou 39 TRMM 39 Apache helicopter pilots 39 NASA Mars Odyssey 39 General Ido Nehushtan 39 spokesman Otte Beeksma 39 KOMPSAT 39 Lipperer 39 RAFD 39 DigitalGlobe ImageLibrary 39 NAS JRB 39 Maritime Helicopter Squadron 39 spokesman Ippo Maeyama 39 aimpoint 39 shuttle Pamela Melroy 39 leader Kavae Tamariki 39 bathymetric survey 39 aerial firefighting 39 Thunderbolt II 39 antiaircraft artillery 39 Air Force SLAF 39 Aeromagnetic 39 midget submarines 39 Airborne geophysics 39 Responsibility AOR 39 VTUAV 39 Bari Kowt 39 sealift capability 39 RAF Chinooks 39 glowing magma 39 Navy MH #R 39 electro-optical/infrared 39 troops 39 reconnaissance ISTAR 39 SAR Lupe 39 F/A-# fighters 39 Soviet MiGs 39 C# Hercules aircraft 39 Imaging Spectrometer MERIS 39 Ituri Brigade 39 UNIKOM 39 situational awareness 39 missiles #mm cannon 39 InfiniTEM survey 39 Bagotville 39 tanks artillery 39 C #H Hercules 39 infrared goggles 39 Wanni liberation 39 Kiowa helicopters 39 Gunship helicopters 39 firebase 39 helitanker 39 intercontinental ballistic missiles ICBMs 39 B 2s 39 F #E Strike 39 AWACS radar plane 39 NASA MODIS 39 ScanEagle 39 Mullaitivu districts 39 interferograms 39 Roi Namur 39 Reaper UAVs 39 Licorne 39 lakeside Mayan 39 Kivu Brigade 39 infantry brigades 39 Aboriginal trackers 39 airforces 39 enhanced Paveway II 39 JTAC confirmed 39 Mars Color Imager 39 precision guided munition 38 Sukhoi Su #MKI 38 Tarnak Farm 38 STOVL aircraft 38 EPOCh 38 dismounted patrols 38 airpower summary 38 INS Aditya 38 AeroTEM 38 Navy MH #S 38 thick jungles 38 Marine Commandos 38 Le Commandant Bouan 38 Unmanned drone 38 Aegis radar 38 Combat Camera 38 F/A-#E/F aircraft 38 Rapid Deployment Forces 38 airborne geophysical survey 38 pilotless drone 38 Batalik sector 38 downlinks 38 smoke plumes 38 infrared beacons 38 spokesman DKP Dassanayake 38 gunship 38 Jeff Bantle 38 IED emplacers 38 Canadair CL 38 Brigadier General Claudio Gabellini 38 airtankers 38 choppers 38 Colonel Alexander Drobyshevsky 38 NASA MODIS satellite 38 army 38 airborne radars 38 Harpoon missile 38 Admiral Verma 38 Holloman AFB 38 USNORTHCOM 38 twin rotor Chinook 38 takeoffs landings 38 Hornet fighter jets 38 Beaufighter 38 Scud launchers 38 F# fighter jets 38 Phased array 38 Antei 38 Al Asad Airfield 38 Operation Flintlock 38 Observe Detect Identify Neutralize 38 Laser Ranging 38 hydrography 38 BVR missiles 38 EUFOR 38 fire extinguishers pumper trucks 38 tactical UAVs 38 Michibiki 38 navy destroyer 38 airborne VTEM survey 38 ESTRACK 38 airborne 38 groundfire