https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.6 2026-03-19T10:41:57.720Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/platforms/304d5731-5627-4f4a-9b9e-3de6f39f9b3d NOAA-9 NOAA-9 (ATN series) was launched on December 12, 1984 and was athird-generation operational meteorological satellite. The satellitedesign provided an economical and stable sun-synchronous platform.This platform enables the satellite to carry advanced operationalinstruments to measure the earth's atmosphere, its surface and cloudcover, and the near-space environment. The satellite was based uponthe Block 5D spacecraft bus developed for the U.S. Air Force, and wascapable of maintaining an earth-pointing accuracy of better than plusor minus 0.1 degree with a motion rate of less than 0.035 degree/second.Primary sensors included (1) an Advanced Very High ResolutionRadiometer (AVHRR), (2) a TIROS Operational Vertical Sounder (TOVS),(3) an Earth Radiation Budget Experiment (ERBE), and (4) a SolarBackscatter Ultraviolet Radiometer (SBUV/2). The secondary experimentwas a Data Collection and Platform Location System (DCPLS). A Searchand Rescue Satellite Aided Tracking (SARSAT) system was also carriedon NOAA-9.Orbital Characteristics- Orbital Period: 102.00 m Inclination: 99.17 degrees Eccentricity: 0.00145 Periapsis: 841.00 km Apoapsis: 862.00 kmTo view a 3D orbit, observe the J track satellite tracking web page:'http://liftoff.msfc.nasa.gov/RealTime/JTrack'__________Taken from the NSSDC System for Information Retrieval and Storage (SIRS). Formore information contact the NSSDC Coordinated Request and User Support Office,301-286-6695 (NASA Goddard Space Flight Center, Code 933.4, Greenbelt, Maryland20771, USA, 'http://nssdc.gsfc.nasa.gov/').Group: Platform_Details Entry_ID: NOAA-9 Group: Platform_Identification Platform_Category: Earth Observation Satellites Platform_Series_or_Entity: NOAA POES (Polar Orbiting Environmental Satellites) Short_Name: NOAA-9 Long_Name: National Oceanic & Atmospheric Administration-9 End_Group Group: Synonymous_Platform_Names Short_Name: NOAA-9 End_Group Group: Platform_Associated_Instruments Short_Name: AVHRR Short_Name: TOVS Short_Name: ERBE End_Group Group: Orbit Orbit_Inclination: 99.17 deg Period: 102 min Perigee: 841 km Apogee: 862 km End_Group Creation_Date: 2007-11-09 Online_Resource: http://nssdc.gsfc.nasa.gov/ Sample_Image: http://liftoff.msfc.nasa.gov/RealTime/JTrack Group: Platform_Logistics Launch_Date: 1984-12-12 Primary_Sponsor: NASA End_GroupEnd_Group