https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/platforms/b2e2ad86-b73f-44fd-9992-6f32820ea847 NOAA-11 NOAA-11 (ATN series) was launched on September 24, 1988 and is athird-generation operational meteorological satellite for use in theNational Operational Environmental Satellite System (NOESS). Thesatellite design provides an economical and stable sun-synchronousplatform. This platform enables the satellite to carry advancedoperational instruments to measure the earth's atmosphere, its surfaceand cloud cover, and the near-space environment. The satellite is basedupon the Block 5D spacecraft bus developed for the U.S. Air Force, andis capable 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 include (1) an Advanced Very High ResolutionRadiometer (AVHRR), (2) TIROS Operational Vertical Sounder (TOVS), and(3) a Solar Backscatter Ultraviolet Spectrometer (SBUV/2). Thesecondary experiment is a Data Collection System (DCS). A Search andRescue (SAR) system is also carried on NOAA-11.Orbital Characteristics- Orbital Period: 101.50 m Inclination: 99.00 degrees Eccentricity: 0.00256 Periapsis: 833.00 km Apoapsis: 870.00 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-11 Group: Platform_Identification Platform_Category: Earth Observation Satellites Platform_Series_or_Entity: NOAA POES (Polar Orbiting Environmental Satellites) Short_Name: NOAA-11 Long_Name: National Oceanic & Atmospheric Administration-11 End_Group Group: Synonymous_Platform_Names Short_Name: NOAA-11 End_Group Group: Platform_Associated_Instruments Short_Name: TOVS Short_Name: AVHRR Short_Name: SBUV End_Group Group: Orbit Orbit_Inclination: 99 deg Perigee: 833 km Apogee: 870 km End_Group Creation_Date: 2007-10-17 Online_Resource: http://nssdc.gsfc.nasa.gov/ Group: Platform_Logistics Launch_Date: 1988-09-09 Primary_Sponsor: NASA End_GroupEnd_Group