X band model of Venus atmosphere permittivity

Abstract

[1] A model of Venus' atmosphere permittivity profile up to 300 km is developed in this paper for X band. The model includes both the real and imaginary parts of the atmospheric permittivity, derived using data sets inferred or directly measured from past exploration missions to Venus: the real part is obtained by calculating the total polarization of the mixture of the atmospheric components including CO 2 , N 2 , H 2 O, SO 2 , H 2 SO 4 , CO, etc.; the imaginary part is derived using the superposition of the absorption of each component. The properties of the atmospheric components such as polarization and absorption are modeled with respect to frequency, temperature, and pressure. The validity of this model is verified by comparing simulation results with available measurements of Venus' atmosphere. This permittivity model is intended as a critical tool for the design of next-generation orbiting radar systems, in particular interferometric radars.

Spin state and moment of inertia of Venus

“…One-way absorption through the atmosphere of Venus at the sub-Earth point is ∼5.62 dB at X band [51], which effectively decreases our signal-to-noise ratio by a factor of ∼10 compared to that of a hypothetical atmosphereless Venus.…”

Mapping Lava Flows on Venus Using SAR and InSAR: Hawaiʻi Case Study

“…As high physical perpendicular baseline to critical baseline ratios have a detrimental effect on InSAR correlation, we believe that longer radar wavelengths are optimal for our lava detection method. Longer radar wavelengths also travel more easily through Venus' atmosphere, reducing the impact of attenuation on the signal to noise of the correlation signal (Duan et al., 2010; Meyer & Sandwell, 2012). A higher radar bandwidth also linearly increases the length of the critical baseline, however higher bandwidth radar produces a higher volume of data, requiring the satellite to have a faster data downlink.…”

Universal Approach to Rapid Amplified Plasmonic Sensing Using Helix Defect Phase Transition Polymers

“…The base dielectric permittivities of analyzed gases in this work were taken as those of DC values which is valid for nonpolar gases due to the absence of the gas transitions in MW range. [ 40 ] Permittivity values of the pure gas phases at ambient pressure were obtained from [ 41,42 ] and are listed in Table S1, Supporting Information. Quadrupole moment values for gases were taken from Reference [ 43 ] .…”