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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Venus atmosphere ionization distribution, temperature and pressure profiles determined from amplitudes and differential Doppler of radio signals to Mariner 5 during occultation
Transient Faraday rotation of S-band telemetry carrier observed during Pioneer 6 occultation by solar corona, correlating with decametric solar radio bursts
Mars atmosphere refractivity, carbon dioxide condensation, temperature and surface pressure from Mariners 6 and 7 radio occultation measurements
Viking Mars orbiter/lander mission planning, studying sun, earth and star occultations sensitive mission characteristics
Radio receiver bandwidth effect on lunar occultation observations
Mariner 6 radio signals frequency changes analysis during occultation measurement for determining Mars surface pressure and temperature
Mars upper atmosphere refractivity, free electron number density and plasma temperature altitude profiles from Mariner 1969 radio occultation measurements
Lunar occultation observation of Jupiter by radio telescope, determining one dimensional strip brightness distribution
Mariner 6/7 S band radio occultation probe of Mars atmosphere concerning surface pressure, temperature and existence of ionosphere
S band occultation experiment for Mariner Mars 1971 orbiters, measuring atmospheric density and ionospheric electron density profiles
Mars lower atmosphere vertical temperature distributions from Mariner 6 and 7 radio occultation data, using improved trajectory estimates
Remote probing of earth atmosphere by refraction measurements of microwaves propagated between occultation satellites
Planetary atmosphere Mariner spacecraft occultation experiments, showing neglect of latitudinal and longitudinal variations introduce serious errors
Venus atmosphere determinations by Mariner 5 radio occultation measurements, deriving altitude profiles of refractivity, molecular number density, pressure, temperature and radio frequency absorption
Mariner S-band occultation experimental data compared with theory for accuracy of physical characteristics of Mars and Venus atmosphere, reviewing data reduction and error analysis
Evaluation of seeing effects on the light curve of a stellar occultation by the moon. Some theoretical studies of Fried (1966) and Hulett (1967) on the linear size of the downward-looking seeing disk are cited, showing that the seeing blur amounts to a few centimeters for a star in the zenith and that the linear blur must grow approximately as (sec z) to the 3/2 power. For most observations the seeing blur will not exceed 8 to 10 cm. The limitation on angular resolution imposed by this seeing effect is calculated.
A preliminary analysis of 15 radio occultation measurements taken on the day side of Mars between 40 deg S and 33 deg S has revealed that the temperature in the lower 15 to 20 km of the atmosphere of Mars is essentially isothermal and warmer than expected. This result, which is also confirmed by the increased altitude of the ionization peak of the ionosphere, can possibly be caused by the absorption of solar radiation by fine particles of dust suspended in the lower atmosphere. The floor of the classical bright area of Hellas was found to be about 6 km below its western rim and 4 km below the mean radius of Mars at that latitude.
Lunar occultations of IRC + 10216 have been used to determine the size of the regions emitting 2.2-, 3.5-, 4.8-, and 10-micron radiation. The results are interpreted as the first direct measurement of the physical size of a dust shell surrounding a late-type star.