VLEO SatellitesA New Earth Observation Space Systems Commercial and Business Model

Dakka, Sam M.

doi:10.1049/cp.2018.1718

Cited by 8 publications

(6 citation statements)

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Section: Very Low Earth Orbit (Vleo)mentioning

confidence: 99%

“…By developing satellites for use in Very Low Earth Orbits (VLEO), which are orbits with an altitude of 450 km or lower (Virgili-Llop et al 2014) (Dakka 2018), the spatial resolution and link budget can be improved by increasing proximity to the imaging target. At these low altitudes, the atmosphere is sufficient to produce significant drag on the spacecraft (Virgili-Llop et al 2014) (Dakka 2018), which then needs to perform drag compensation with chemical or electric propulsion (Dakka 2018). Furthermore, the atmospheric presence at these altitudes causes erosion of spacecraft outer surfaces with atomic oxygen found in the upper atmosphere, so a countermeasure would need to be implemented (Banks, De Groh and Miller 2004;Samwel 2014).…”

Section: Very Low Earth Orbit (Vleo)mentioning

confidence: 99%

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Using Satellite Data for CBRN (Chemical, Biological, Radiological, and Nuclear) Threat Detection, Monitoring, and Modelling

2021

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CBRN (Chemical, Biological, Radiological, and Nuclear) threats are becoming more prevalent, as more entities gain access to modern weapons and industrial technologies and chemicals. This has produced a need for improvements to modelling, detection, and monitoring of these events. While there are currently no dedicated satellites for CBRN purposes, there are a wide range of possibilities for satellite data to contribute to this field, from atmospheric composition and chemical detection to cloud cover, land mapping, and surface property measurements. This study looks at currently available satellite data, including meteorological data such as wind and cloud profiles, surface properties like temperature and humidity, chemical detection, and sounding. Results of this survey revealed several gaps in the available data, particularly concerning biological and radiological detection. The results also suggest that publicly available satellite data largely does not meet the requirements of spatial resolution, coverage, and latency that CBRN detection requires, outside of providing terrain use and building height data for constructing models. Lastly, the study evaluates upcoming instruments, platforms, and satellite technologies to gauge the impact these developments will have in the near future. Improvements in spatial and temporal resolution as well as latency are already becoming possible, and new instruments will fill in the gaps in detection by imaging a wider range of chemicals and other agents and by collecting new data types. This study shows that with developments coming within the next decade, satellites should begin to provide valuable augmentations to CBRN event detection and monitoring. Article Highlights There is a wide range of existing satellite data in fields that are of interest to CBRN detection and monitoring. The data is mostly of insufficient quality (resolution or latency) for the demanding requirements of CBRN modelling for incident control. Future technologies and platforms will improve resolution and latency, making satellite data more viable in the CBRN management field

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Section: Very Low Earth Orbit (Vleo)mentioning

confidence: 99%

Section: Very Low Earth Orbit (Vleo)mentioning

confidence: 99%

Using Satellite Data for CBRN (Chemical, Biological, Radiological, and Nuclear) Threat Detection, Monitoring, and Modelling

2021

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“…This can be seen as a challenge, but they can also represent an opportunity for orbit and attitude control [17]. Moreover, the increased drag represents a shortening of the orbital lifetime, but this also means a more frequent fleet replacement of smaller and cheaper spacecrafts, thus, becoming more responsive to technology and market changes [18]. Several private companies such as SpaceX, OneWeb or Telesat are planning to launch their Mobile Satellite Services (MSS) at VLEO.…”

Section: B Vleo and Satcom-assisted Aerial Networkmentioning

confidence: 99%

Satellite Communications in the New Space Era: A Survey and Future Challenges

Kodheli

Lagunas

Maturo

et al. 2021

IEEE Commun. Surv. Tutorials

668

428

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Satellite communications (SatComs) have recently entered a period of renewed interest motivated by technological advances and nurtured through private investment and ventures. The present survey aims at capturing the state of the art in SatComs, while highlighting the most promising open research topics. Firstly, the main innovation drivers are motivated, such as new constellation types, on-board processing capabilities, nonterrestrial networks and space-based data collection/processing. Secondly, the most promising applications are described i.e. 5G integration, space communications, Earth observation, aeronautical and maritime tracking and communication. Subsequently, an in-depth literature review is provided across five axes: i) system aspects, ii) air interface, iii) medium access, iv) networking, v) testbeds & prototyping. Finally, a number of future challenges and the respective open research topics are described.

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“…In addition, in VLO satellites the raised dragging indicates a shortening of the trajectory life span, which means a denser shipping exchange of smaller and cheaper space craft. At the end of this situation, VLO satellites become appropriate more sensitive to technology and changes in the bazaar [21]. Varied particular firms such as Telesat, SpaceX and OneWeb are purposing to initiate their Mobile Satellite Services (MSS) at VLEO.…”

Section: G Networkmentioning

confidence: 99%

A New RF Satellite Link Analyzing and Antenna Effect on Satellite Communication

Çalışır

Akbal

2022

Teh. glas. (Online)

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Satellite communications (SatComs) recently, have admitted as a new technological advances that attracted and raised special investment and ventures. Space communication technology has found many application areas from costly, one-of-a-sort structures, to utilize again of technology on sequential tasks, to the progress of canonical protocols accepted by space agencies of lots of countries. Satellite communication has accepted as one of the important technologies for 5G backhauling, particularly on bandwidth request increased in 5G mobile broad band (eMBB) applications. This paper presents the efficiency of the satellite communication system using 16 QAM digital modulation technique for the X band. This digital modulation method presents high data rate in transmission without raising the bandwidth compared with other digital modulation methods. Applications are realized in Matlab environment and obtained conclusions are discussed such as power spectrum diagrams, constellation schemas and BER ratio for several bands such as 4, 8, 12, 16 GHz.

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VLEO SatellitesA New Earth Observation Space Systems Commercial and Business Model

Cited by 8 publications

References 0 publications

Using Satellite Data for CBRN (Chemical, Biological, Radiological, and Nuclear) Threat Detection, Monitoring, and Modelling

Using Satellite Data for CBRN (Chemical, Biological, Radiological, and Nuclear) Threat Detection, Monitoring, and Modelling

Satellite Communications in the New Space Era: A Survey and Future Challenges

A New RF Satellite Link Analyzing and Antenna Effect on Satellite Communication

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