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Category :
Languages : en
Pages :
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Book Description
The use of unmanned aerial systems (UAS) is becoming increasingly popular for a variety of applications. One way in which these systems can provide revolutionary scientific information is through routine measurement of atmospheric conditions, particularly properties related to clouds, aerosols, and radiation. Improved understanding of these topics at high latitudes, in particular, has become very relevant because of observed decreases in ice and snow in polar regions.
Author:
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Languages : en
Pages :
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Data were collected to improve understanding of the Arctic troposphere, and to provide researchers with a focused case-study period for future observational and modeling studies pertaining to Arctic atmospheric processes.
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Publisher:
ISBN:
Category :
Languages : en
Pages : 2
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The use of small unmanned aircraft systems (sUAS) with miniature sensor systems for atmospheric research is an important capability to develop. The Evaluation of Routine Atmospheric Sounding Measurements using Unmanned Systems (ERASMUS) project, lead by Dr. Gijs de Boer of the Cooperative Institute for Research in Environmental Sciences (CIRES- a partnership of NOAA and CU-Boulder), is a significant milestone in realizing this new potential. This project has clearly demonstrated that the concept of sUAS utilization is valid, and miniature instrumentation can be used to further our understanding of the atmospheric boundary layer in the arctic.
Author: Marcelo I. Guzman
Publisher: MDPI
ISBN: 3039439855
Category : Science
Languages : en
Pages : 248
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Book Description
This book is the first literature collection focused on the development and implementation of unmanned aircraft systems (UAS) and their integration with sensors for atmospheric measurements on Earth. The research covered in the book combines chemical, physical, and meteorological measurements performed in field campaigns, as well as conceptual and laboratory work. Useful examples for the development of platforms and autonomous systems for environmental studies are provided, which demonstrate how careful the operation of sensors aboard UAS must be to gather information for remote sensing in the atmosphere. The work serves as a key collection of articles to introduce the topic to new researchers interested in the field, guide future studies, and motivate measurements to improve our understanding of the Earth’s complex atmosphere.
Author: Marcelo Guzman
Publisher:
ISBN: 9783039439867
Category :
Languages : en
Pages : 248
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Book Description
This book is the first literature collection focused on the development and implementation of unmanned aircraft systems (UAS) and their integration with sensors for atmospheric measurements on Earth. The research covered in the book combines chemical, physical, and meteorological measurements performed in field campaigns, as well as conceptual and laboratory work. Useful examples for the development of platforms and autonomous systems for environmental studies are provided, which demonstrate how careful the operation of sensors aboard UAS must be to gather information for remote sensing in the atmosphere. The work serves as a key collection of articles to introduce the topic to new researchers interested in the field, guide future studies, and motivate measurements to improve our understanding of the Earth's complex atmosphere.
Author: Konstantinos Dalamagkidis
Publisher: Springer Science & Business Media
ISBN: 9400724799
Category : Technology & Engineering
Languages : en
Pages : 318
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Book Description
This book presents, in a comprehensive way, current unmanned aviation regulation, airworthiness certification, special aircraft categories, pilot certification, federal aviation requirements, operation rules, airspace classes and regulation development models. It discusses unmanned aircraft systems levels of safety derived mathematically based on the corresponding levels for manned aviation. It provides an overview of the history and current status of UAS airworthiness and operational regulation worldwide. Existing regulations have been developed considering the need for a complete regulatory framework for UAS. It focuses on UAS safety assessment and functional requirements, achieved in terms of defining an “Equivalent Level of Safety”, or ELOS, with that of manned aviation, specifying what the ELOS requirement entails for UAS regulations. To accomplish this, the safety performance of manned aviation is first evaluated, followed by a novel model to derive reliability requirements for achieving target levels of safety (TLS) for ground impact and mid-air collision accidents.It discusses elements of a viable roadmap leading to UAS integration in to the NAS. For this second edition of the book almost all chapters include major updates and corrections. There is also a new appendix chapter.
Author: Daniel A. Rico
Publisher:
ISBN:
Category :
Languages : en
Pages : 222
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Book Description
The use of unmanned aerial systems (UASs) in agriculture has risen in the past decade and is helping to modernize agriculture. UASs collect and elucidate data previously difficult to obtain and are used to help increase agricultural efficiency and production. Typical commercial off-the-shelf (COTS) UASs are limited by small payloads and short flight times. Such limits inhibit their ability to provide abundant data at multiple spatiotemporal scales. In this thesis, we describe the design and construction of the tethered aircraft unmanned system (TAUS), which is a novel power-over-tether UAS configured for long-term, high throughput atmospheric monitoring with an array of sensors embedded along the tether. This was accomplished by leveraging the physical presence of the tether to integrate an array of sensors. With power from the ground station, the TAUS can acquire continuous volumetric data for numerous hours. The system is used to sense atmospheric conditions and temperature gradients across altitudes. We present the development of the prototype system, along with a discussion of the results from field experiments. We discuss the influence that power losses across the tether have on the sensors’ abilities to accurately sense atmospheric temperature. We demonstrate a 6-hour continuous flight at an altitude of 50 feet, and a 1-hour flight at sunset to acquire the gradually decreasing atmospheric temperature from an array of 6 sensors. We then modeled the TAUS and sensor array to computer simulate four trajectories (mower, spiral, star, and flower) for the TAUS and evaluated the system and sensing performance via well-defined factors. We conducted outdoor experiments to characterize system performance while in operation and to inform the development of models and trajectory simulations. From the analysis of the experimental data, we found minimal sensing error with respect to ground truth installations at comparable altitudes. Leveraging the simulated trajectory outcomes we reconstructed the changing input temperature fields. The analysis of the simulated data indicated that the power-tethered Star trajectory performed well with respect to key performance factors when measuring changing atmospheric fields. The TAUS will be improved by incorporating multivariable sensors and an optimal control algorithm for elevated levels of operational autonomy.
Author: Christopher Michael Zarzar
Publisher:
ISBN:
Category :
Languages : en
Pages : 78
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Book Description
Unmanned Aerial Systems (UASs) offer a new era of local-scale environmental monitoring where access to invaluable aerial data no longer comes at a substantial cost. This provides the opportunity to vastly expand the ability to detect natural hazards impacts, observe environmental conditions, quantify restoration efforts, track species propagation, monitor land surface changes, cross-validate existing platforms, and identify hazardous situations. While UASs have the potential to accelerate understanding of natural processes, much of the research using UASs has applied current remote sensing image processing techniques without questioning the validity of these in UAS applications. With new scientific tools comes a need to affirm that previous techniques are still valid for the new systems. To this end, the objective of the current study is to provide an assessment regarding the use of current remote sensing image processing techniques in UAS applications. The research reported herein finds that atmospheric effects have a statistically significant impact on low altitude UAS imagery. Correcting for these external factors affecting the imagery was successful using an empirical line calibration (ELC) image correction technique and required little modification for use in a complex UAS application. Finally, it was found that classification performance of UAS imagery was reliant on training sample size more than classification technique, and that training sample size requirements are larger than previous remote sensing studies suggest.
Author: Ronald Alele
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
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Book Description
Author: Arthur J. Helmicki
Publisher:
ISBN:
Category : Aerial photogrammetry
Languages : en
Pages :
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Book Description
Unmanned aerial systems (UAS) have received significant attention in recent years due to substantial advances in capabilities. The goal for this project has been to work with Drive Ohio and the OH UAS Center: (1) to identify those ODOT core business functions which can be improved/enhanced by application of UAS technologies, (2) to identify the corresponding necessary UAV system configurations and missions and (3) to begin developing, testing, and documenting vehicle system configurations and capabilities to perform these missions. In collaboration with ODOT, the following application areas were selected for in-depth investigation: Bridge and facility inspection, aerial mapping, construction monitoring, and traffic monitoring and management. Additional integrative, crosscutting technologies to support operations were also considered. A variety of UAS vehicle systems were acquired along with associated cameras and supporting hardware and software. In addition, custom hardware and software were developed for systems integration and operation, image processing and tele-remote UAV video streaming. Several hundred hours of flight operations were conducted at test sites as well as in actual ODOT field operational setting across the state of Ohio. The limits of UAS operations and applications in these areas were explored and documented. Based on the results obtained, a set of 7 Standard Operations Procedures (SOPs) were developed and delivered and associated training session were conducted. The research showed that UAS operations are poised to dramatically impact several areas, and that ODOT, through its UAS Center, is poised to capitalize on many of these trends leading to improved operational efficiency, increased safety and mobility, and reduced costs.
