3 EFFECTS OF HYDROGEN AND WATER INJECTIONS ON THE IONOSPHERE.......... 51 3.1 Phenomenology of Hydrogen in the Upper Atmosphere ............ 51 3.1.1 The Overall Problem.................................... 51 3.1.2 The Fate of ^O/H? Injected in the Thermosphere (Zinn) . 51 3.1.3 Some Details of the Distribution of Propulsion Effluents (Park) ............................... 52 3.1.4 Effect of H2O/H2 Injections on Geocoronally Scattered Lyman-a and Lyman-0 Radiation (Prasad and Forbes). ... 55 3.2 Morphology of Perturbed Ionospheric Regions (Fedder).......... 55 3.2.1 Ionospheric Depletion due to a Single Burn............ 55 3.2.2 Ionospheric Depletion due to the Multiple Launches during SPS Construction......................... 57 3.2.3 Dissociative Recombination of and 0H+ (Bernhardt — prepared after the Workshop) ..... 58 3.2.4 Verification of the Extent of the Depleted F-Region of Section 3.2.2............................... 60 3.2.5 Possible Experimental Verification: Some Relevant Natural Phenomena (Carlson — prepared after Workshop) . 60 3.2.6 Effects of the Reduced Ionization on HF Propagation (Bauer)......................................... 61 3.2.7 Ionospheric Irregularities Associated with the Depleted Regions ............................... 62 3.3 Effects on Satellite Drag (Curtis)............................ 63 3.4 Airglow (Turco).............................................. 64 3.5 Potentially Important Phenomena (Vondrak) .................... 66 3.6 Atmospheric Experiments ...................................... 67 3.6.1 Rocket Experiments (Pongratz).......................... 67 3.6.2 LAGOPEDO-Type Releases (Fedder)........................ 68 3.6.3 Ionospheric Irregularities (Bernhardt) ................ 68 3.6.4 Other Experiments (Aikin).............................. 69 4 MAGNETOSPHERIC EFFECTS............................................. 71 4.1 Introduction.................................................. 71 4.2 Phenomenology of H2O/H2 Injection in the Plasmasphere and Magnetosphere (Zinn).................................... 71 4.3 Injection of keV Plasma (Palmadesso).......................... 72 4.3.1 Potential Consequences........... 72 4.3.2 Phenomenology Issues to be Resolved.................... 73 4.4 Some Possible Effects...................... 73 4.4.1 Enhancement of Trapped Radiation (Chiu)................ 73 4.4.2 Dumping of the Radiation Belts (Aikin, Cladis) ........ 74 4.4.3 Depletion versus Enhancement of the Radiation Belts (Curtis)................................. 75 4.4.4 Phenomenology Associated with Large Space Structures (Vondrak)....................................... 76 4.4.5 A Ring of Neutral Gases Associated with the Satellite (Garrett)....................................... 76 4.5 Synthesis of Magnetospheric Effects and Possibly Important Phenomena (Chiu)........................................ 77
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