"Cloud cover." . . "Sulfuric acid." . . "Venus (Planet)" . . . . "Venus atmosphere." . . "Microwave emission." . . "Radio occultation." . . . . . . . . . . . . . . . . . "Radio occultation studies of Venus atmosphere with Magellan final technical report, grant NAGW-4450 to the National Aeronautics and Space Administration, Goddard Space Flight Center : February 1, 1997 through January 31, 1998"@en . . . . . . . . . . . "Electron density (Concentration)" . . "Temperature profiles." . .