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OGO 6 Bennett Ion Mass Spectrometer Data

This home page provides access to data from the OGO 6 BIMS experiment for the time period from June 12, 1969 to December 31, 1970 in ASCII format.The instrument measures the ion densities of seven ion species (H+, He+, N+, O+, N2+, NO+, O2+). Each data record lists the density and orbit parameters for one specific density measurement. The ASCII data set also contains needed spacecraft position data, IGRF model parameters, and indices.

Time Resolution: ~40 seconds

This data set and its description are located at SPDF's FTP site

Time spans of data set: 1969-06-12 - 1969-12-01 and 1970-03-01 - 1970-12-31
Note: There are many data gaps within these time spans


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,month,day(YYYYMMDD)
   Start time    Stop time

* Select Ion Index
1
2
3
4
5
6
7
H+   He+   N+   O+   N2+   NO+   O2+  

* Select variables (User can restrict the allowable range by entering low/high parameter values)
Variable Name Format of
ASCII files
Optional values:
Low    High
Magnetic Local Time in decimal hours F5.2   
Geodetic Latitude, Degrees F6.2   
Geodetic Longitude, Degrees F6.2   
Geomagnetic Latitude, Degrees F6.2   
Altitude,km F7.2   
Dip - Magnetic inclination, deg. F5.1   
L-shell F5.2   
L-code (1- correct; 2 - not correct;
    3 - approx. used)
I1   
3-hourly Ap magnetic index I3   
3-hourly Kp magnetic index I2   
F10.7 - Daily solar radio flux I3   
R - Daily sunspot number I3   
Ion Density (good data), cm-3
     for the selected ion
E10.4   
Ion Density (all data), cm-3
     for the selected ion
E10.4   
S/C Charge, Volts F6.2   
Velocity, km/sec F6.2   
Orbit number I5   
Eclipse Flag (0 - not in eclipse;
    1 - in eclipse)
I1   
Current, Amperes E10.4   
Voltage, Volts F5.1   
Shaft Angle, degrees F6.2   


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NASA Official: Dr. Robert McGuire, Head of the Space Physics Data Facility