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HELIOS2 Online Data Set Selector

HELIOS2 data format description can be found here .

Data are available from 1976-01-18 (Year 1976, Day 18) to 1980-03-04(Year 1980, Day 64) .


Start Date
Year(YYYY): ,Day of the Year(DDD): ,Hour:
End Date
Year(YYYY): ,Day of the Year(DDD): ,Hour:
Carrington Rotation Number Seen by an Earth based observer at the start of the data interval 
Spacecraft Heliocentric Distance astronomical units
Heliographic Inertial Latitude 
of the spacecraft position
at the start of data interval 		degrees, +/- 90
Heliographic Inertial Longitude 
of the spacecraft position
at the start of data interval 		degrees, 0-360
Earth - Sun - Spacecraft 
separation angle 		degrees, 0-360 
BX in SSE coordinate system nanoteslas
BY in SSE coordinate system  nanoteslas
BZ in SSE coordinate system nanoteslas
BR in RTN coordinate system nanoteslas
BT in RTN coordinate system  nanoteslas
BN in RTN coordinate system nanoteslas
Scalar B (avg of fine scale 
magnitudes) 		nanoteslas 
Solar wind bulk flow speed km/s 
Proton flow elevation angle (RTN) degrees +/- 90
Proton flow azimuth angle (RTN) degrees, +/-180
Solar wind density protons/cm3 
Radial component of the proton 
temperature 		degrees, K
Acknowledgments:
  • This page was created with kind help of Dr. JosephH. King, NASA/NSSDC, who supplied OMNI and COHO data.
    • Copyright © 1999, 2002 Laboratory of Computational Mathematics,
    Skobeltsyn Institute of Nuclear Physics,
    Moscow State University