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- Etalon are a Russian family (Etalon-1, Etalon-2) of passive geodetic satellites dedicated to satellite laser ranging. Etalon-1 was the first geodynamic satellite launched by the former Soviet Union. The Etalon spacecraft were launched in 1989 in conjunction with a pair of GLObal'naya NAvigatisionnay Sputnikovaya Sistema (GLONASS) satellites. The mission objectives were to determine a high accuracy terrestrial reference frame and earth rotation parameters, to improve the gravity field, and to improve the gravitational constant.
[Summary provided by NASA.]
Group: Platform_Details Entry_ID: ETALON-2 Group: Platform_Identification Platform_Category: Earth Observation Satellites Platform_Series_or_Entity: ETALON Short_Name: ETALON-2 End_Group Group: Synonymous_Platform_Names Short_Name: ETALON-2 End_Group Group: Platform_Associated_Instruments Short_Name: RIS End_Group Group: Orbit Orbit_Inclination: 65.5 deg Period: 675 min Perigee: 19120 km Apogee: 19120 km Orbit_Type: HEO > Highly Elliptical Orbit End_Group Creation_Date: 2007-09-26 Online_Resource: http://ilrs.gsfc.nasa.gov/satellite_missions/list_of_satellites/eta1_general.html Sample_Image: http://ilrs.gsfc.nasa.gov/images/etalon.gif Group: Platform_Logistics Launch_Date: 1989-05-31 Primary_Sponsor: Russia End_Group End_Group
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