HETE 2
Participating institutions with HETE-2 team members include the following:[2] After the launch mishap of HETE-1, NASA agreed to rebuild the satellite using flight spares.Among the contributing factors was NASA's concern that neither of the HETE-2's backup stations (Cayenne, French Guiana; Singapore) were fully operational.The need for ample telemetry contact with HETE-2 during the critical early phases of the mission served to heighten concern over ground station availability.Without it, they could not properly respond to, avoid or minimize, any unforeseen satellite activation difficulties, such as those encountered by a number of prior NASA-launched missions.They also determined that the extra time would allow for the HETE-2 satellite to be returned to the East Coast for additional simulations and further testing to enhance the likelihood of a successful mission.A unique feature of the HETE mission was its capability to localize GRBs with ~10 arcseconds accuracy in near real time aboard the spacecraft, and to transmit these positions directly to a network of receivers at existing ground-based observatories enabling rapid, sensitive follow-up studies in the radio, infrared (IR), and visible light bands.A very high frequency (VHF) downlink (137.9622 MHz) was used for the real-time burst alerts via a whip antenna mounted on one of the solar panels.The goal of the mission is to continuously scan the sky and identify occurrences of GRBs, establish precise locations and transmit coordinates in near real time (< 10 seconds).
High-energy astronomyCOSPAR IDSATCAT no.Massachusetts Institute of TechnologyPegasus-HKwajalein AtollOrbital Sciences CorporationGeocentric orbitLow Earth orbitPerigee altitudeApogee altitudeInclinationPeriodFrancefirst HETE-1Herndon, VirginiaCenter for Space ResearchCambridge, MassachusettsGalápagosAscensionKiribatiLos Alamos National LaboratoryLos Alamos, New MexicoUniversity of California, BerkeleySpace Sciences LaboratoryBerkeley, CaliforniaUniversity of California, Santa CruzSanta Cruz, CaliforniaUniversity of ChicagoIllinoisCentre d'Étude Spatiale des RayonnementsToulouseHiva OaCayenneInstituto Nacional de Pesquisas EspaciaisSão José dos CamposBrazilNatal, Rio Grande do NorteTata Institute of Fundamental ResearchMumbaiBangaloreConsiglio Nazionale delle RicercheBolognaMalindi, KenyaWakō, SaitamaSingaporeMiyazaki Universityflight sparesBeppoSAXelectronsprotonsVandenberg Air Force BaseCaliforniaFrench GuianaInternational Traffic in Arms RegulationsU.S. State DepartmentKwajalein Missile RangeEast Coastgamma-ray burstsultravioletgamma-rayarcsecondsinfraredvisible lightsolar panelaluminumsiliconS-bandvery high frequencySun sensorssteradiansgamma-ray spectrometersspectroscopymicrosecondsblack holeX-ray transientseclipticGRB 030329GRB 050709X-Ray Flashesnickel–cadmium batteriesExplorer programpublic domainSpace telescopesRadio and MicrowaveSolar OrbiterSTEREOQueqiaoQueqiao 2James WebbOpticalAstrosatCHEOPSDSCOVREuclidHiRISEHubbleHinode (Solar-B)NEOSSatPROBA-3Aditya-L1HibariChandra (AXAF)Einstein ProbeHXMT (Insight)INTEGRALSpektr-RGMax Valier SatMinXSS-2NuSTARXPoSatXMM-NewtonAMS-02Mini-EUSOPETRELSPHERExK-EUSONancy Grace Roman Space TelescopeXuntianNEO SurveyorJASMINESolar-C EUVSTSpektr-UVSpektr-MLiteBIRDAthena