Geocoronal imaging with Dynamics Explorer

Details Geocoronal imaging with Dynamics Explorer Geocoronal imaging with Dynamics Explorer

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9113613r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Dec. 1, 1986, p. 13613-13630.

Physics

160

Density (Number/Volume), Dynamics Explorer 1 Satellite, Hydrogen, Lyman Alpha Radiation, Ultraviolet Photometry, Auroras, Computerized Simulation, Exosphere, Geocoronal Emissions, Limb Brightening, Radiative Transfer

Scientific paper

The ultraviolet photometer of the University of Iowa spin-scan auroral imaging instrumentation on board Dynamics Explorer-1 has returned numerous hydrogen Lyman alpha images of the geocorona from altitudes of 570 km to 23,300 km (1.09 R sub E to 4.66 R sub E geocentric radial distance). The hydrogen density gradient is shown by a plot of the zenith intensities throughout this range, which decrease to near celestial background values as the spacecraft approaches apogee. Characterizing the upper geocorona as optically thin (single-scattering), the zenith intensity is converted directly to vertical column density. This approximation loses its validity deeper in the geocorona, where the hydrogen is demonstrated to be optically thick in that there is no Lyman alpha limb brightening. Further study of the geocoronal hydrogen distribution will require computer modeling of the radiative transfer.

Affiliated with

Also associated with

No associations

Rating

Geocoronal imaging with Dynamics Explorer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Geocoronal imaging with Dynamics Explorer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geocoronal imaging with Dynamics Explorer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1125537