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Mission Architecture to Characterize Habitability of Venus Cloud Layers via an Aerial Platform
Published 2022-07-01“…The aerobot transmits data via an orbiter relay combined with a direct-to-Earth link. The orbiter is captured into a 6-h retrograde orbit with a low, roughly 170-degree, inclination. …”
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Asteroid shower on the Earth-Moon system immediately before the Cryogenian period revealed by KAGUYA
Published 2020-07-01“…Here, the authors study impact craters on the Moon with ages up to 800 million years ago and present a cross correlation to Earth, linking up to mass extinction events throughout Earth’s history.…”
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Rain induced attenuation studies for v-band frequency in tropical regions
Published 2009“…The study attempts to investigate the impacts of rain on the performance of satellite-Earth links at V-band frequency. Attenuation due to rain at 38GHz had been measured for a period of 20 months in Malaysia. …”
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Proceeding Paper -
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Rain induced attenuation studies for V-band frequency in tropical regions
Published 2009“…The study attempts to investigate the impacts of rain on the performance of satellite-Earth links at V-band frequency. Attenuation due to rain at 38GHz had been measured for a period of 20 months in Malaysia. …”
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Indigenous Interests in Outer Space: Addressing the Conflict of Increasing Satellite Numbers with Indigenous Astronomy Practices
Published 2022-03-01“…Prior to humankind’s entry into and progressive exploration of Outer Space, the practice of astronomy, what Venkatesan et al. describe as the “millennia-old ability to observe, discover and analyse the cosmos from the surface of the Earth”, linked humankind to Outer Space; in particular the Indigenous Peoples whose practice of astronomy is integral to their ways of life. …”
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The Utilization of Plant Facilities on the International Space Station—The Composition, Growth, and Development of Plant Cell Walls under Microgravity Conditions
Published 2015-01-01“…Two critical factors are the basis for longer space experiments: a. the effects of gravity on the molecular mechanisms for cell wall development, b. the availability of facilities and hardware for performing cell wall experiments in space and return of RNA/DNA back to the Earth. Linked to these aspects is a description of existing hardware functioning on the International Space Station.…”
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A Blockchain-Based Authentication Protocol Using Cryptocurrency Technology in LEO Satellite Networks
Published 2021-12-01“…However, the frequent switching of satellite-earth links imposes a great challenge in LEO communication authentication. …”
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Polarization Weather Radar Development from 1970–1995: Personal Reflections
Published 2019-11-01“…The modern era of polarimetric radar begins with radiowave propagation research starting in the early 1970s with applications to measurement and modeling of wave attenuation in rain and depolarization due to ice particles along satellite−earth links. While there is a rich history of radar in meteorology after World War II, the impetus provided by radiowave propagation requirements led to high-quality antennas and feeds. …”
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Rain attenuation prediction for higher frequencies in microwave communication using frequency scaling technique
Published 2015“…Atmospheric effects play a major role in designing terrestrial or satellite-to-earth links operating at frequencies above 5 GHz. Raindrops absorb and scatter radio waves, leading to signal attenuation and reduction of the systems availability and reliability. …”
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Conference or Workshop Item -
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Disparities in the induced rain attenuation between beacon (narrowband) and broadband satellite links in tropical zones
Published 2018“…The utilisation of higher frequency bands above 10 GHz by the satellite industries to provide the bandwidth (BW) required for broadband multimedia services, video conferencing, direct-to-home TV programmes and IP data requires the understanding of atmospheric losses and good link planning for satellite-to-earth links. The trade-off between the service availability, data rate and BW determine the type of modulation scheme and error corrections to be employed. …”
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Inter-satellite optical wireless system
Published 2007“…There is also a place for high data rate (many Gbps) space-earth links, though propagation effects due to the atmosphere and weather make this a much more difficult link. …”
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Disparities in the induced rain attenuation between beacon (Narrowband) and broadband satellite links in tropical zones
Published 2018“…The utilisation of higher frequency bands above 10 GHz by the satellite industries to provide the bandwidth (BW) required for broadband multimedia services, video conferencing, direct-to-home TV programmes and IP data requires the understanding of atmospheric losses and good link planning for satellite-to-earth links. The trade-off between the service availability, data rate and BW determine the type of modulation scheme and error corrections to be employed. …”
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Opportunistic Rain Rate Estimation from Measurements of Satellite Downlink Attenuation: A Survey
Published 2021-08-01“…More recently, a different approach to rain rate estimation techniques has been proposed and investigated, based on the measurement of the attenuation induced by rain on signals of pre-existing radio networks either in terrestrial links, e.g., the backhaul connections in cellular networks, or in satellite-to-earth links and, among the latter, notably those between geostationary broadcast satellites and domestic subscriber terminals in the Ku and Ka bands. …”
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Article