Measurements of Turbulence in the Venus Atmosphere Deduced from Pioneer Venus Multiprobe Radio Scintillations

  title={Measurements of Turbulence in the Venus Atmosphere Deduced from Pioneer Venus Multiprobe Radio Scintillations},
  author={Richard Woo and John W. Armstrong and William B. Kendall},
  pages={87 - 89}
The 2.3-gigahertz log-amplitude fluctuations observed in the radio links of the Pioneer Venus entry probes during Venus encounter have been used to study turbulence in the Venus atmosphere. The deduced estimates of the upper bound of structure constant cn of the refractive index fluctuations (cn ≲ 4 x 10–8 cm–⅓) are inconsistent with similar entry probe measurements by Veneras 4 to 8 but are consistent with the radio occultation measurements by flyby (Mariners 5 and 10) and orbiting (Venerat 9… 
Radio scintillations during occultations by turbulent planetary atmospheres. [remote sensing via flyby spacecraft]
The radio occultation experiment which uses the radio link between the earth and spacecraft passing behind planets has proven to be an important method for remote sensing turbulence in planetary
Detection of layering in the upper cloud layer of Venus northern polar atmosphere observed from radio occultation data
[1] Observations of radio wave scintillations represent an important tool for measuring of small-scale irregularities in the atmosphere of Venus. Prominent features of enhanced scintillation located
Eddy diffusion coefficient for the atmosphere of Venus from radio scintillation measurements
Estimates of the vertical mass eddy diffusion coefficient K are necessary to understand the dynamics and photochemistry of a planetary atmosphere. Most previous estimates for the atmosphere of
Ammonia abundance in Jupiter's atmosphere derived from the attenuation of the Galileo probe's radio signal
The radio signal from the Galileo probe to the orbiter experienced attenuation due to ammonia in Jupiter's atmosphere during the probe descent. A profile of the ammonia content as a function of depth
Measurements of thermal structure and thermal contrasts in the atmosphere of Venus and related dynamical observations: Results From the four Pioneer Venus Probes
Thermal structure of the atmosphere of Venus, and differences in structure with latitude (up to 60°) and clock hour (from midnight to 8 A.M.) have been measured in situ from an altitude of 126 km to
Galileo radio science investigations
The radio science investigations planned for Galileo's 6-year flight to and 2-year orbit of Jupiter use as their instrument the dual-frequency radio system on the spacecraft operating in conjunction
Modeling of Venus Atmospheric RF Attenuation for Communication Link Purposes
This paper describes a method for modeling microwave propagation and signal attenuation along an electromagnetic ray linking a spacecraft with a descent probe within the atmosphere of Venus.
Reference Model Payload for Ice Giant Entry Probe Missions
Descent probes afford the opportunity to make essential atmospheric measurements that are beyond the reach of remote sensing, including the atmospheric abundances of noble gases and key isotopes, and
Evolution of the Huygens Probe Spin During Parachute Descent
The anomalous spin of the Huygens probe on Titan is simulated with a simple model, which is also applied to the (also anomalous) spin history from a terrestrial parachute drop test. The model consi...


Observations of Turbulence in the Atmosphere of Venus using Mariner 10 Radio Occultation Measurements
  • R. Woo
  • Physics, Environmental Science
  • 1975
Abstract In this paper we develop a technique for estimating the outer scale of turbulence in a planetary atmosphere using dual-frequency radio occultation measurements. This technique is based on
Wind Velocities on Venus: Vector Determination by Radio Interferometry
To determine the wind directions and speeds on Venus, as each Pioneer probe fell to the surface we tracked its motion in three dimensions using a combination of Doppler and long-baseline radio
Thermal Contrast in the Atmosphere of Venus: Initial Appraisal from Pioneer Venus Probe Data
The altitude profiles of temperature and pressure measured during the descent of the four Pioneer Venus probes show small contrast below the clouds but significant differences within the clouds at altitudes from 45 to 61 kilometers, consistent with cyclostrophic balance of zonal winds.
Structure of the Atmosphere of Venus up to 110 Kilometers: Preliminary Results from the Four Pioneer Venus Entry Probes
The four Pioneer Venus entry probes transmitted data of good quality on the structure of the atmosphere below the clouds, finding that the atmosphere is nearly isothermal around 100 kilometers (175 to 180 K) and appears to exhibit a sizable temperature wave between 60 and 70 kilometers.
Encounter with Venus: An Update
This report is an introduction to the accompanying collection of early results from the Pioneer Venus orbiter and multiprobe missions, which encountered Venus on 4 December and 9 December 1978,
Atmospheric turbulence on Venus: Venera 4, 5, 6, and Mariner 5 estimates
  • D. Wolf
  • Physics, Environmental Science
  • 1971
Venus atmospheric turbulence from Venera 4, 5, 6 and Mariner 5 observations, discussing scaling laws and normalized signal-amplitude standard deviation
Encounter with Venus
This report is an introduction to the accompanying collection of initial results from the successful Pioneer Venus orbiter and mutiprobe missions that encountered Venus on 4 December and 9 December
ofNASA Ames Research Center for their planning and execution of the mission
  • R. B. Miller and J. Wackley of the DSN for their valuable support;
  • 1979
Wackley of the DSN for their valuable support
    It is a pleasure to thank the many people whose contributions were essential to the success of this experiment