satellite.js

SGP4/SDP4 calculation library
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sgp4satellite

spacedatastandards.org

space data standards framework based on ccsds standards and google flatbuffers
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celestrakcelestrak.orgflatbuffersccsdsnasaspace forceesajaxaisroroscosmoscnesdlruksaasisupremesatksasupremesatplanetary societyblue originspacexorbital sciencesaerospace corporationboeinglockheed martinsgp4mean elementsspacedata standardsstandardssatelliteorbit determinationspace debrisspace situational awarenessconstellationtlesastroinformaticsspacemissiongeospatialastronauticsspace engineeringspace sciencespace explorationspace industrycommercial spacecivil spacespace technologymars missionslunar missionsspace policyspace weatherspace lawspace securityartemis programexoplanetsinternational space stationsmall satellitescubesatsspace telescopesspace probesspace roboticsdeep space networkspace logisticsrocket sciencespace launch systemsjsonjavascripttypescriptphppythonjavadartgoswiftc++c#rustlobster

ootk-core

Orbital Object Toolkit. A modern typed replacement for satellite.js including SGP4 propagation, TLE parsing, Sun and Moon calculations, and more.
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satellitesgp4sunmoonorbitspacetoolkit

ootk

Orbital Object Toolkit including Multiple Propagators, Initial Orbit Determination, and Maneuver Calculations.
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sgp4orbittoolkitspacesatelliteradariod

jspredict-dc

javascript port of predict open-source satellite tracking library
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satelliteorbittleqthpredictspacesgp4noradgeostationaryleoazimuthelevationspacecraftspire