Related by context. All words. (Click for frequent words.) 71 Alphabus 68 ASTRA 1KR 68 Telstar #N 67 ASTRA 1L 67 Highly Adaptable Satellite 66 Express AM# 65 Yahsat 1A 65 Anik G1 64 geosynchronous satellite 64 ASTRA 1M 64 EchoStar XIV 64 JCSAT 9 64 Skynet 5C 64 W2A 64 Eutelsat KA SAT 64 Satellite Successfully Launched 64 GPS IIF 64 Orbital Sciences Pegasus 64 Astrium Satellites 63 Galileo constellation 63 GIOVE B 63 SATLYNX 63 Falcon 1e 63 ASTRA 5B 63 W2A satellite 62 nexgen 62 Nimiq 5 62 SPACEWAY TM 62 Optus D3 62 W3A 62 Eurostar E# 62 UK DMC2 62 GPS Block IIF 62 Anik F2 62 Alcatel Alenia 62 MEASAT 3a 62 TDRS K 62 Azerspace 62 Turksat 4A 61 Arabsat 5A 61 Anik F1R 61 Ocean Salinity 61 Astrium Eurostar 61 XTAR EUR 61 geostationary satellite 61 Astra 3B 61 BepiColombo 61 Galileo satellites 61 Inmarsat Fleet 61 Ariane launcher 61 RADARSAT 2 61 Telesat Nimiq 61 Ariane 5G 61 Turksat 3A 61 Globalstar constellation 61 SICRAL 1B 61 ASTRA 3B 61 A# spacecraft 61 Koreasat 6 61 LMCSS 60 DSCS III 60 KA SAT 60 Skynet 5B 60 Telstar #R 60 HYLAS 60 Intelsat IS 60 Helios 2B 60 Eutelsat Communications SA 60 MetOp 60 EarthCARE 60 ATV Jules Verne 60 Ku Band 60 CX OLEV 60 CHIPSat 60 Eurostar E# platform 60 TanDEM X 60 Suitcase CCT# 60 Skynet 5A 60 geo stationary 60 ASTRA 2B 60 QZSS 60 Synthetic Aperture Radar 60 TDRSS 60 Spacebus 60 Swift# 59 INSAT 2E 59 SwiftBroadband 59 eNfusion 59 Thales Alenia 59 ASTRA 5A 59 geostationary communications 59 geosynchronous satellites 59 ST5 59 SISLink 59 Orbital Express 59 geosynchronous communications 59 SSM# 59 Intelsat Galaxy 59 Astra 1M 59 AMPERE 59 SKYLink 59 Block IIF 59 Telesat Anik F2 59 Launched Successfully 59 KA SAT satellite 59 Anik F3 59 Apstar 59 AsiaStar 59 GPS IIR M 59 SES WORLD SKIES NSS 59 ILS Proton Successfully Launches 59 ARCTUS 59 Metop 59 Astra 1L 59 SkySat 59 Eurobird 59 Cosmo SkyMed 59 SurfBeam 59 Intelsat satellites 59 Solar Orbiter 59 SIRAL 59 geo stationary satellite 59 geo synchronous 59 Nimiq 4 59 Glonass K 58 CARTOSAT 2A 58 ExoMars mission 58 COSMO SkyMed 58 steerable beams 58 GPS IIR 58 SATCOM II 58 Inmarsat 58 VT iDirect 58 ICO G1 satellite 58 EUTELSAT 58 INSAT 3D 58 Iridium NEXT 58 Yahsat Y1A 58 GPS 2R 58 satellite GSAT 58 ICO G1 58 geosynchronous 58 AEHF satellite 58 DMSP F# 58 GLONASS constellation 58 Minotaur IV 58 DIRECTV 9S 58 Hispasat 1E 58 steerable beam 58 iDirect Evolution platform 58 Launch Scrubbed 58 Inmarsat BGAN 58 BSAT 3b 58 Starsem 58 Optus C1 58 Inmarsat satellites 58 SES Sirius 58 Eutelsat W2 58 SpaceshipTwo 58 HAMSAT 58 satcoms 57 AfriStar 57 Reusable Launch Vehicle 57 TSBc 57 Boeing #HP 57 EADS Astrium GmbH 57 DVCS# 57 Proton Breeze M 57 INSAT satellites 57 MEASAT 57 GPS GLONASS 57 WGS satellites 57 NAVSTAR Global Positioning System 57 HOT BIRD 57 CBERS 2B 57 narrowband tactical 57 entire Milstar constellation 57 Alenia Space 57 MILSATCOM 57 INSAT 3A 57 polar orbiting 57 GPS Block IIR 57 geostationary satellites 57 JCSAT 57 satellite HYLAS 57 TerraSAR X 57 LISA Pathfinder 57 GSAT 5P 57 Inmarsat SwiftBroadband 57 W7 satellite 57 INSAT 3E 57 iDirect Evolution 57 HISDESAT 57 Optus D2 57 SMOS Soil Moisture 57 Cubesat 57 GOES O 57 antenna reflector 57 ExoMars Trace Gas 57 Crew Launch Vehicle 57 ILS Proton Breeze 57 Optus D1 57 NOAA GOES 57 TDRS satellites 57 AXTracker 57 Yahsat 57 uncrewed 57 Cospas Sarsat 57 XTAR 57 ESA Planck 57 Nimiq 57 MicroSat Systems 57 geo synchronous transfer 57 Milstar satellites 57 Terrestar 57 Wideband Gapfiller Satellite 57 Orbital Sciences Taurus 56 Spaceway F1 56 Greenhouse Gases Observing 56 Watchkeeper UAV 56 modernized IIR 56 Chinasat 6B 56 SpeedCast 56 AEHF 56 Astrium GmbH 56 sensor payloads 56 BGAN FleetBroadband 56 Ariane launchers 56 Cygnus spacecraft 56 YahClick 56 Insat 56 Inmarsat Iridium 56 STSS Demo 56 orbit GEO 56 System MUOS 56 Ancillary Terrestrial Component ATC 56 IsatPhone 56 MALE UAV 56 Satellite Launch Vehicle GSLV 56 SBIRS GEO 56 Stratellite 56 SkyRouter 56 MetOp satellite 56 RapidEye constellation 56 Drive Away CCT# 56 SpaceLoft 56 HYLAS satellite 56 Eutelsat W2A satellite 56 Eutelsat W2A 56 nanosatellites 56 Soyuz launcher 56 IntelsatONE 56 H IIB 56 Y1A 56 MTP# 56 GPS SBAS 56 geosynchronous transfer orbit 56 Telstar #N satellite 56 Giove B 56 BSAT 3a 56 GOES N 56 geosynchronous orbit GEO 56 Eutelsat HOT BIRD TM 56 Wideband Global 56 Foton M2 56 Ted Gavrilis 56 Resourcesat 2 56 broadband subsidiary Skylogic 56 Shuttle Docks 56 Turksat 56 ASTRA 1G 56 E'Prime 56 Continuity Mission LDCM 56 Insat 3A 56 SES AMERICOM AMC 56 lidar instrument 56 VINASAT 1 56 VTUAV 56 GLONASS M 56 geostationary earth 56 STSS Demonstration 56 SatCom Global 56 Insat 4B 56 Fleet F# 56 Laser Interferometer Space 56 ProtoStar II 55 ESA Proba 55 Atlantis Undocks From 55 GSM backhaul 55 unpressurized cargo 55 WaveCall TM 55 Protostar 55 ISS Reshetnev 55 ViaSat SurfBeam 55 TETRA Terrestrial Trunked Radio 55 GPS IIIA satellite 55 MicroSat 55 Permanent Multipurpose Module PMM 55 Septentrio 55 GLOBETrekker 55 Pegasus XL 55 XTAR EUR satellite 55 Geosynchronous 55 AMERICOM 55 OG2 satellites 55 Polar Operational 55 SAFIR 55 Merlin 1C 55 TDRS 55 RASCOM 55 Mobile User Objective 55 Security GMES 55 Cargo Launch Vehicle 55 Based Augmentation System 55 D CIXS 55 Solar Sail 55 Vanu Anywave 55 Arianespace Ariane 5 55 Orion Crew 55 ADVA Optical Networking FSP 55 geosynchronous GEO 55 Proba 2 55 Orbital Taurus 55 ISS resupply 55 EO IR sensor 55 L5 signal 55 INTELSAT 55 LinkStar 55 Milstar 55 ASTRA 4A 55 ESTRACK 55 GPS IIF satellites 55 Panamsat 55 INSAT 4CR 55 Anik F1 55 NASA GeneSat 1 55 SMOS 55 Telenor Satellite Broadcasting 55 DigitalGlobe WorldView 55 UHF SATCOM 55 Huygens Probe 55 SSETI Express 55 terrestrial transmitters 55 entavio 55 NASA Landsat 55 Paksat 1R 55 Shuttle Atlantis docks 55 optionally piloted 55 MSAT G2 55 NASA GLAST 55 SBSS satellite 55 SpaceDev Dream Chaser 55 aboard SpaceX Falcon 55 Eutelsat Communications 55 Shuttle Discovery undocks 55 Virgin Galactic unveils 55 Full Flight Simulators 55 Aero Sekur 55 datalink 55 Palapa D 55 Launch Vehicle EELV 55 SWE DISH 54 Simulsat 54 Satellites GOES 54 Sinosat 54 SAT DSA 54 Thermo Scientific LTQ Orbitrap 54 HALE UAV 54 Selective Availability Anti Spoofing 54 Soyuz FG 54 ENVISAT 54 Nanosat 54 ASTRA satellites 54 Optus D3 satellite 54 Landsat Data 54 ARISSat 54 ACeS 54 SCISAT 54 MSS ATC 54 BGAN satellite 54 Shuttle Endeavour docks 54 Satcom 54 Redu Belgium 54 Insat 4A 54 Stock Exchange SESG 54 TecSAR 54 Launch Abort System 54 NPOESS Preparatory Project 54 System TSAT 54 experimental payloads 54 RascomStar QAF 54 INSAT 4A 54 SES ASTRA 54 SSTL 54 EUROBIRD 54 Infrared Sensor 54 Europa Orbiter 54 Inmarsat FleetBroadband 54 KOMPSAT 54 CETel 54 VINASAT 54 SAR Lupe 54 EchoStar XV 54 O3b 54 Jules Verne ATV 54 HEO payloads 54 Geostationary 54 C 5Ms 54 KazSat 54 Globalstar satellites 54 Advanced EHF 54 Rosetta orbiter 54 Leica Viva 54 Astrosat 54 ASTRA 1N 54 meteorological satellites 54 ORBCOMM satellite 54 Spirent GSS# 54 NAVSTAR 54 Geo synchronous 54 Navigation Satellite 54 W2M satellite 54 Proba 54 Milstar satellite 54 NuSTAR 54 W3B 54 Planetary Transits 54 ILS Proton 54 W5A 54 MUOS satellite 54 Vega launcher 54 Sanswire TAO 54 Earth Observation Satellite 54 ARABSAT 54 Ubiquiti 54 Shuttle Discovery blasts 54 Access Multiplexer 54 geostationary transfer 54 Asiasat 54 SpaceCom 54 SES Astra 54 Simonetta Di Pippo 54 Surrey Satellite 54 SpaceShip Two 54 Eutelsat ATLANTIC BIRD TM 54 Avanti Communications 54 Satellite Terminals 54 OrbView 3 54 LSAM 54 Block 5D 54 Telit CC# DUAL 54 Astro E2 54 DVB-S/S2 54 geo stationary satellites 54 HISPASAT 54 GAGAN 54 SPACEWAY 3 54 SMART TS 54 Technology Demonstrator 54 MPCV 54 CubeSat 54 Small Diameter Bomb 54 Paksat 54 Dianne VanBeber spokeswoman 54 Herschel Planck 54 Wide Area Augmentation 54 polar orbiting satellites 54 Dnepr rocket carrying 54 WGS Block 54 Moovbox 54 Meteosat 54 coarse wavelength division multiplexing 54 modular stackable 54 MEO satellites 54 SATCOM WGS 54 WGS satellite 54 Geared Turbofan 53 SATCOM Satellite 53 Eurobot 53 Ariane rocket 53 VASIMR 53 JSAT 53 SMEX 53 IMEWE 53 Iridium NEXT satellites 53 FB# [001] 53 Motorola SoftSwitch 53 RQ 7B Shadow 53 AirCell Axxess 53 terrestrial concentrator 53 Arabsat BADR 53 Meteorological Satellites 53 satellite constellation Iridium 53 JSAT Corporation 53 Greenbelt Md. manages 53 EUMETSAT 53 JPSS 53 Mach6 53 Vehicle CEV 53 Nuclear Spectroscopic Telescope Array 53 YahLive 53 Measat 3a 53 SpaceLoft XL 53 Vinasat 53 PARASOL 53 LNBs 53 MHz transponder 53 SBIRS HEO 53 Block IIR 53 Watchkeeper 53 ILS Proton launch 53 troposcatter communications 53 orbiter lander 53 EASy 53 Eutelsat HOT BIRD 53 SUAV 53 Hellas Sat 53 Infoterra GmbH 53 SES Americom AMC 53 Globalstar satellite 53 inertial measurement unit 53 FlexACM 53 iDirect Intelligent Platform 53 Anik F2 satellite 53 Orbit Validation IOV 53 PSLV C9 53 FluxData 53 DSNG 53 Earth Observation EO 53 Orion spacecraft 53 SICRAL 53 Spaceway 53 GPS WAAS 53 Cartosat 2B 53 orbital slots 53 geostationary 53 Evolium 53 High Frequency AEHF 53 Reaches Orbit 53 PSLV C 53 Inmarsat plc LSE ISAT 53 Innosuisse 53 Laura Schlessinger shifts 53 CBERS 53 LEOP 53 IEC #-# compliant 53 Geotab 53 EuroHawk 53 eXPhone 53 designated GPS IIR 53 satcom 53 Navy Multiband Terminal 53 manpack radio 53 WORLDSAT 53 SpaceX Dragon 53 WATCHKEEPER 53 VistaNav 53 ProtoStar 53 Carlo Gavazzi Space 53 Nimbra platform 53 SkyReach 53 NigeriaSat 53 Unmanned Aircraft System 53 BusinessCom 53 German SAR Lupe 53 Rockot launch 53 Meteosat satellites 53 WaveCall 53 wireless datacom 53 EPOCH IPS 53 Kliper 53 nanosatellite 53 Soyuz launchers 53 Advanced EHF satellite 53 WAAS GPS 53 UHF VHF 53 Launch Vehicle 53 Philae lander 53 Multi Object Spectrograph 53 ESA Earth Observation 53 GOES R 53 Shenzhou VIII 53 INSAT 4B 53 SELEX GALILEO 53 Vizada Networks 53 TTNT 53 SkyTrac Systems 53 GOSAT 53 COMSATBw 53 satID 53 Satellite Modems 53 Zenit 3SLB 53 planetary Transits 53 DTCS 53 Technology Insertion 53 geo synchronous orbit 53 Molniya 53 SSJ# 53 Max Launch Abort 53 Fire Scout VTUAV 53 RascomStar Qaf 53 MTSAT 1R 53 II D5 Fleet 53 Rockot 53 E 8C 53 Heterodyne Instrument 53 Alvarion BreezeACCESS 53 geo stationary orbit 53 SpaceX Falcon 9 53 Technology Demonstration JCTD 53 Hyperspectral Imager 53 Atlas IIAS 53 SatMAX R 53 InterReach Office 53 Transformational Satellite Communications 53 LuxX SESG 53 Paradigm Secure 53 Eutelsat Communications Euronext Paris 53 Telespazio 53 AEHF satellites 53 radioisotope thermoelectric generator 53 Operationally Responsive Space 53 Insat 3E 53 Hotbird 53 Satcom Direct 52 Kayser Threde 52 Exploration Vehicle CEV 52 dexterous robot 52 Tactical Engagement 52 Jupiter Icy Moons 52 unmanned rotorcraft 52 Ku Ka 52 HD Encoder 52 satellite Giove 52 OuterLink 52 ASTRA satellite 52 Kopernikus 52 AMF JTRS 52 Cloud Aerosol Lidar 52 ISRO Polar 52 SeaSpace 52 PSLV C7 52 B#NG 52 O OREOS 52 electric ion propulsion 52 SmartSat 52 TETRA TErrestrial Trunked RAdio 52 SPACEWAY 52 GA ASI 52 Geospace 52 LinkControl 7 52 Vehicle OBV 52 Solar Arrays 52 LightSail 1 52 Esrange 52 ASTRA 2C 52 Mars Pathfinder lander 52 NAVSTAR GPS 52 Altair lunar lander 52 kg payload 52 DKET 52 FalconSat 52 Soyuz TMA #M 52 Sonardyne 52 Advantage# 52 windshield wiper maneuver 52 satellite constellation 52 Newtec 52 Dyna Soar 52 Interorbital Systems 52 Baikonur spaceport 52 STP S# 52 HDS# 52 POES satellites 52 INSAT 52 Laboratory MSL 52 Horizon Compact 52 telemetry tracking 52 Variable Specific 52 BT Livetime 52 ExoMars 52 MLX# [002] 52 Cosmic Vision 52 Chandrayaan II 52 Tactical Tomahawk 52 TriaGnoSys 52 Moon Mineralogy Mapper M3 52 orbital slot 52 NetPerformer 52 STSS satellites 52 Radiation Dose Monitor 52 Oceansat 52 Full Operational Capability 52 Earth Observation satellites 52 decommissioned Peacekeeper 52 Smartzone 52 MVNE platform 52 Astrium 52 Delfi C3 52 interplanetary spacecraft 52 Dimetra IP Compact 52 IRIS payload 52 Profiler Suite OMPS 52 ROCSAT 2 52 AM6 52 OrbView 52 Tooway satellite 52 AAI Shadow 52 RISAT 52 radar altimeter 52 Telemetrix R 52 RR# engine 52 Astronaut Julie Payette 52 perigee nearest point 52 Block IIR M 52 earth orbiting satellites 52 Interplanetary Internet 52 GEO satellites 52 Globalstar Simplex data 52 Heron UAV 52 troposcatter 52 HEO payload 52 AN/FPS-# 52 IRNSS 52 STAR ISMS ™ 52 JTRS HMS 52 communication satellite GSAT 52 Helmet Mounted Display 52 Foton spacecraft 52 C #J Joint 52 FTTS 52 Tekelec EAGLE 5 52 DuraCOR 52 TeleEye 52 Airbus ACJ 52 exactEarth Ltd. 52 MP RTIP 52 Launch Postponed 52 Payloads 52 Thrusters 52 electro optical sensor 52 Cartosat 2A 52 Eutelsat W7 satellite 52 propulsion subsystem 52 GlobalConnex 52 MEXSAT 52 TACAN 52 LightSail 52 Stratospheric Observatory 52 AS# NP 52 Synthetic Aperture Radar SAR 52 Alpha Magnetic Spectrometer AMS 52 JCTD 52 RazakSAT 52 MTSAT 52 Earth Orbit LEO 52 iPSTAR 52 APCO P# 52 Vipersat 52 #HS [001] 52 GERAN 52 orbital rendezvous 52 GeoStreamer ® 52 Re engining 52 ECI XDM 52 SpaceX Dragon capsule 52 ActivFlex 52 Axesat 52 Tactical UAV 52 INMARSAT 52 Galileo Avionica 52 manned spaceships 52 GNSS receivers 52 Scaled Composites SpaceShipOne 52 Eutelsat Tooway 52 Integral Systems EPOCH IPS 52 IPSTAR satellite 52 HF VHF 52 Arabsat Nilesat 52 CALIPSO 52 EADS Astrium 52 DVB S2 modulation 52 PAKSAT 52 NewWave Broadband 52 CSM# 52 wideband RF 52 Milstar constellation 52 HyFly 52 A#AX platform 52 DIRECTV 7S 52 DragonLab 52 Skylogic 52 H IIA 51 Automated Transfer Vehicle 51 AIM #D 51 Eurockot 51 QUALCOMM chipset 51 Harris CapRock Communications 51 SSPTS 51 Ka band 51 Infosat Communications 51 interplanetary missions 51 Postpones Launch 51 GSLV Mk III 51 Terrestrial Planet Finder 51 Automatic Transfer 51 GPS IIIA 51 LEO satellites 51 Vehicle ATV 51 ANTRIX 51 HySI 51 Meteosat Second Generation 51 MSV MSAT 51 GMES 51 lunar landers 51 THAICOM 51 enters lunar orbit 51 supersonic combustion 51 SLC 3E 51 Lakehurst NJ completing 51 Crew Prepares 51 SpaceWire 51 spaceport anchor tenant 51 SDD phase 51 COSPAS SARSAT 51 System SBIRS 51 APT Satellite 51 RapidCell 51 ESMD 51 Astra2Connect 51 transceiver chipset 51 Observatory SDO 51 Gaele Winters 51 Battlefield Airborne 51 PointRed 51 RAMTelecom 51 Ku band 51 Kourou spaceport 51 eXConnect 51 EK# [001] 51 Ocean Salinity SMOS 51 Orbital Pegasus 51 Net Insight Nimbra 51 Geosynchronous Transfer Orbit 51 MiniBOSS 51 Tech Insertion 51 A#T Hummingbird 51 Sounding Rocket 51 endurance UAV 51 Orbital Taurus II 51 SBSS Block 51 Ares Orion 51 Infosat 51 M# GPS RADIONOVA 51 MC#i 51 stratospheric airship 51 Gilat SkyEdge 51 suborbital spacecraft 51 Inmarsat Broadband 51 Broadband Routers 51 LCGS 51 ARINC Direct 51 GSTB V2 51 Dual Carrier 51 GE Satcom 51 GlobeTel Wireless 51 Space Fence 51 SSPAs 51 MC#D 51 Kourou French Guyana 51 CH #K Heavy 51 Cryosat 51 Rosetta comet chaser 51 G FORCE ONE 51 RQ 4B 51 Skies NSS 51 EELVs 51 Shuttle Discovery arrives 51 Orion LAS 51 FOTON 51 #CBi 51 GQM #A Coyote 51 LEMV 51 Earth orbit LEO 51 exactEarth 51 Euronext Paris Alcatel 51 Landsat Data Continuity 51 Intersputnik 51 satellite Vinasat 51 Climate Sounder 51 Sensis MDS 51 GPS L2C 51 Motorola Dimetra IP 51 NCADE 51 Jupiter Icy Moons Orbiter 51 XMM Newton X ray 51 Iridium NEXT constellation 51 satellite WorldView 51 high altitude airship 51 TCDL 51 cryocooler 51 StreetMapper 51 nanoGSM 51 eLORAN 51 Scramjets 51 electro-optical/infrared sensors 51 Hawk AJT 51 Square Kilometer Array 51 Magnetospheric 51 crewed missions 51 TRANSMIT 51 long endurance HALE 51 ReFLEX 51 JPALS 51 Pad Abort 1 51 TRuepoint 51 W CDMA networks 51 Towercom 51 NASA Wallops 51 Environment Explorer LADEE 51 MeerKAT 51 Koreasat 51 ESA SMOS 51 Integral Systems SATCOM 51 Relative Navigation 51 unmanned airships 51 BGAN terminal 51 SKY Perfect JSAT 51 Advanced EHF satellites 51 Shenzhou manned 51 Infrared Astronomy 51 airborne observatory 51 GB GRAM 51 Netted Iridium 51 Vehicle PSLV 51 Communications System DSCS 51 ESA CNES 51 Chinasat 9 51 Beidou 51 Successfully Launched 51 LEAP X1C 51 Satellite Launch Vehicle PSLV 51 Ciel Satellite 51 Allot NetEnforcer 51 TIM# 51 Segue TM 51 ASTRA Satellite 51 Rascom 51 Digivance 51 Joint Capability 51 Rosen Eutelsat 51 SESAT 1 51 NASA Gamma ray 51 IKONOS 51 Venus Climate Orbiter 51 MAINGATE 51 Shuttle Endeavour undocks 51 Resurs 51 LRASM 51 Dual Frequency 51 ScanEagle UAS 51 Atacama Large Millimeter submillimeter 51 SKY PerfecTV 51 geostationary orbit 51 CDMA femtocell 51 MEASAT Satellite Systems 51 Cosmic Background Explorer 51 NASTAR SM Center 51 Glonass satellites 51 ATV Johannes Kepler 51 Kosmotras 51 Mark N. Sirangelo 51 3G/WCDMA 51 Powerline MU 51 Satellite Launch 51 Jim Parm 51 expendable Atlas 51 TWTAs 51 airborne shipboard 51 Pan Tilt 51 ASKAP 51 GPS# [001] 51 IsatPhone Pro 51 HIAPER 51 RESOURCESAT 51 Siterra + 51 3G/GSM 51 tethered aerostat 51 Mobile OnAir 51 Exploration Vehicle 51 MQ 8B Fire 51 Sherborne Sensors 51 Cessna Citation XLS 51 SMOS satellite 51 OmniGlobe Networks EMEA 51 ATIRCM 51 Stratellite TM 51 NFIRE 51 GPS IIIA satellites