This interface provides access to hourly resolution "impact parameters" for pairs of obgects ( Earth,Moon,IMP,Wind,ACE,Geotail ). These are the distances by which a plasma element moving radially away from the sun with a speed of 390 km/s, observed at an upstream spacecraft would miss intercepting a downstream spacecraft (or Earth), allowing for the 30 km/s motion of the Earth and its nearby spacecraft about the sun. Dij, the impact parameter for the i-j pair of bodies, is given by SQRT {[Yi-Yj + (Xi-Xj)/13]**2 + (Zi-Zj)**2}. For a schematic figure and further description click HERE
Impact parameters: ISEE3, IMP8, Earth
Impact parameters: ACE, Wind,IMP8, Geotail, Earth
Impact parameters: Moon, ACE, Wind, IMP8, Geotail, Earth
Impact parameters: DSCOVR, ACE, Wind, Earth
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If you have any questions/comments about the OMNWeb Plus, contact
Dr. Natalia Papitashvili,Mail Code 672,
NASA/Goddard Space Flight Center, Greenbelt, MD 20771 |