The Arecibo Observatory's legacy and future radar capabilities

Venditti, Flaviane; Marshall, Sean; Devogèle, Maxime; Zambrano-Marín, Luisa F.; McGilvray, Anna

doi:10.1016/j.actaastro.2023.05.023

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…(Mudgway 2001;Slobin & Pham 2013). It is of historical significance to note that Arecibo's larger 300 m diameter antenna offered 1 MW of transmit power before its collapse in 2021 (Venditti et al 2023). Taking this into account, it is worth noting the assumptions for transmitting 1 MW from a 70 m antenna are not absolute upper limits for the radio technosignature footprint of a ∼Type 0.7 civilization like Earth (Sagan 2000).…”

Section: Detectability Of Technosignatures: Interplanetary Communicat...mentioning

confidence: 99%

Detecting Technosignatures from Earth-scale Civilizations

Ashtari

2023

ApJ

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Assuming civilizations have similar interplanetary communications and radar capability to NASA’s Deep Space Network, what is the feasibility of intercepting their communications? Interplanetary conjunctions between Earth-like exoplanets, their stars, and other planets in their systems provide one of the most unique and pragmatic opportunities for detecting technosignatures. While eavesdropping on terrestrial communications becomes limited by a planet’s rotation, the beams of satellite communications and interplanetary radar transmissions are tracked, providing the most persistent and powerful opportunity for signal interception. In this study, we present a framework for assessing exoplanet habitability and establishing quantitative bounds for detecting Earth-scale technosignatures from Earth-like planets. These constraints for time, frequency, sky positions, and observatory sensitivity provide recommended observational guidelines for using state-of-the-art and future ground-based radio observatories toward technosignature detection. Applying this framework, 16 exoplanet targets are proposed for radio observation.

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Section: Detectability Of Technosignatures: Interplanetary Communicat...mentioning

confidence: 99%

Detecting Technosignatures from Earth-scale Civilizations

Ashtari

2023

ApJ

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“…The range and Doppler information of nearly 1000 NEAs from radar observations has improved the available orbital information of these objects [19,20]. This is a crucial part of planetary defense in terms of evaluating the risks that the NEAs pose.…”

Section: Planetary Radar Science In the 21st Centurymentioning

confidence: 99%

Planetary Radar—State-of-the-Art Review

Virkki,

Neish,

Rivera-Valentín

et al. 2023

Remote Sensing

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Planetary radar observations have provided invaluable information on the solar system through both ground-based and space-based observations. In this overview article, we summarize how radar observations have contributed in planetary science, how the radar technology as a remote-sensing method for planetary exploration and the methods to interpret the radar data have advanced in the eight decades of increasing use, where the field stands in the early 2020s, and what are the future prospects of the ground-based facilities conducting planetary radar observations and the planned spacecraft missions equipped with radar instruments. The focus of the paper is on radar as a remote-sensing technique using radar instruments in spacecraft orbiting planetary objects and in Earth-based radio telescopes, whereas ground-penetrating radar systems on landers are mentioned only briefly. The key scientific developments are focused on the search for water ice in the subsurface of the Moon, which could be an invaluable in situ resource for crewed missions, dynamical and physical characterization of near-Earth asteroids, which is also crucial for effective planetary defense, and a better understanding of planetary geology.

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Scientific issues and critical technologies in planetary defense

CHENG,

ZHANG

2024

Chinese Journal of Aeronautics

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The Arecibo Observatory's legacy and future radar capabilities

Cited by 5 publications

References 24 publications

Detecting Technosignatures from Earth-scale Civilizations

Detecting Technosignatures from Earth-scale Civilizations

Planetary Radar—State-of-the-Art Review

Scientific issues and critical technologies in planetary defense

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