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Electron temperature and density from ISIS-2

This home page provides access to data set which includes the archived data from the Cylindrical Electrostatic Probe (CEP) experiment on the ISIS-2 satellite. ISIS-2 was launched on 1971-04-01 into a circular orbit at about 1400 km with an inclination of 88.1 degrees. It's payload included sweep- and fixed-frequequency ionosondes, a VLF receiver, energetic and soft particle detectors, an ion mass spectrometer, an retarding potential analyzer, a radio beacon, a cosmic radio noise experiment, photometers (3914, 5577, and 6300 Angstrom) and the CEP. A tape recorder with 1-h capacity was included on the satellite. Data were also collected during overflights of several telemetry stations. The telemetry stations were in areas that provided primary data coverage near the 80-deg-W meridian and in areas near Hawaii, Singapore, Australia, the UK, Norway, India, Japan, Antarctica, New Zealand, and Central Africa.
ASCII data set also contains needed spacecraft position data, IGRF model parameters, and indices.

Time Resolution: 6 seconds

This data set and its description placed at anonymous FTP site in directory /data/isis/plasma_cep/isis2/

Time span of data set: 1971-04-14 - 1973-03-03


Users may generate time series plots from this page or may generate a scatter plot of any parameter pair by clicking here

Please enter your selections and then click on the Submit button.

*Select an activity
    Plot data List data Create file

* Enter start and stop dates: year(71-73),month(01-12),day(1-31),hour(0-23)[YYMMDDHH]
   Start time    Stop time

*Select variables

 Magnetic Local Time
 Geodetic Latitude, Degrees
 Geodetic Longitude, Degrees
 Geomagnetic Latitude, Degrees
 Geomagnetic Longitude, Degrees
 Invariant Latitude, Degrees
 L parameter
 Altitude,km
 Magnetic inclination (dip), Degrees
 Dip Latitude, Degrees
 ZSUN, Solar Zenith Angle, Degrees, 0-180
 Velocity Angle, Degrees
 Magnetic field Angle, Degrees
 Sun Angle, Degrees
 Ap indices (daily) 
 Kp indices (3 hour) 
 F10.7 (solar radio flux, daily)
 Sunspot number (daily)
 Electron Temperature,K 
 Electron Density (cm-3)
 Confidence value (Te)
 Satellite potential (mV)
 Probe (0-bottom, 1-top)
 Orbit number


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Send questions about ATMOWeb data to Dr. Dieter Bilitza
Send questions about ATMOWeb system/interface to: Dr. Natalia Papitashvili

NASA Official: Robert Candey (Robert.M.Candey@nasa.gov), Head of the Space Physics Data Facility