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0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda definition "- Spacecraft Brief Description - ISIS 1 was an ionospheric observatory instrumented with sweep- and fixed-frequency ionosondes, a VLF receiver, energetic and soft particle detectors, an ion mass spectrometer, an electrostatic probe, an electrostatic analyzer, a beacon transmitter, and a cosmic noise experiment. The sounder used two dipole antennas (73 and 18.7 m long). The satellite was spin-stabilized at about 2.9 rpm after antenna deployment. Some control was exercised over the spin rate and attitude by using magnetically induced torques to change the spin rate and to precess the spin axis. A tape recorder with 1-h capacity was included on the satellite. The satellite could be programmed to take recorded observations for four different time periods for each full recording period. The recorder data were dumped only at Ottawa. For non-tape-recorded observations, data for the satellite and subsatellite regions could be acquired and telemetered when the spacecraft was in the line of sight of telemetry stations. The selected telemetry stations were in areas that provided primary data coverage near the 80-deg-W meridian and in areas near Hawaii, Singapore, Australia, England, Norway, India, Japan, Antarctica, New Zealand, and Central Africa. NASA support of the ISIS project was terminated on October 1, 1979. A significant amount of experimental data, however, was acquired after this date by the Canadian project team. ISIS 1 operations were terminated in Canada on March 9, 1984. The Radio Research Laboratories (Tokyo, Japan) then requested and received permission to reactivate ISIS 1. Regular ISIS 1 operations were started from Kashima, Japan, in early August 1984. ISIS 1 was deactivated effective January 24, 1990. - Auxiliary Information - Launch Date and Time : 1969-01-30 06:43:00 Epoch Date and Time : 1969-02-04 Apogee (km or AU): 3526. Perigee (km or AU): 578. Inclination (degree) : 88.42 Orbit Type : Geocentric Information last updated on 1992-03-09 Group: Platform_Details Entry_ID: ISIS-1 Group: Platform_Identification Platform_Category: Earth Observation Satellites Platform_Series_or_Entity: ISIS (International Satellite for Ionospheric S Short_Name: ISIS-1 Long_Name: International Satellite for Ionospheric Studies-1 End_Group Group: Synonymous_Platform_Names Short_Name: ISIS-A End_Group Group: Platform_Associated_Instruments Short_Name: LASER SPECTROMETER Short_Name: VLF RECEIVERS End_Group Group: Orbit Orbit_Inclination: 88.4 Period: 128.4 min Perigee: 578 km Apogee: 3526 km End_Group Creation_Date: 2007-10-05 Online_Resource: http://nssdc.gsfc.nasa.gov/database/MasterCatalog?sc=1969-009A Sample_Image: http://www.space.gc.ca/asc/img/I-1_ISIS1-photo.jpg Group: Platform_Logistics Launch_Date: 1969-01-30 Primary_Sponsor: NASA End_Group End_Group" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda id "1653021" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_id 3466eed1-2fbb-49bf-ab0b-dc08731d502b @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_id b39a69b4-c3b9-4a94-b296-bbbbe5e4c847 @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_id dfc148f7-69ed-401a-b2d2-f2c4097ef9b6 @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_id f3261de5-34c1-4980-af22-f9d7e7206d12 @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_label "Earth Observation Satellites" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_label "International Satellite for Ionospheric Studies (ISIS)" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_label "Platforms" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda path_label "Space-based Platforms" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda prefLabel "ISIS-1" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda reference "" @default.
0e8963d6-040a-4df2-a7f6-c7dbc1ef1bda tag "Platforms" @default.