Journal of High Altitude Ballooning最新文献

Active Heading Control Platform for Instruments Flown on High Altitude Balloons 高空气球仪表主动航向控制平台

Journal of High Altitude Ballooning Pub Date : 2021-08-09 DOI: 10.31274/JHAB.13028

A. Kruger, Robert Maksimowicz, Mehrunisa Zaheer, Alfredo Almaraz-Vega, Jesús Urquiza

{"title":"Active Heading Control Platform for Instruments Flown on High Altitude Balloons","authors":"A. Kruger, Robert Maksimowicz, Mehrunisa Zaheer, Alfredo Almaraz-Vega, Jesús Urquiza","doi":"10.31274/JHAB.13028","DOIUrl":"https://doi.org/10.31274/JHAB.13028","url":null,"abstract":"Experiments flown on high-altitude balloons are typically free to spin without any control or information collected on the payload orientation during flight, limiting the scope of experiments that can be performed. Projects that include targeting (i.e. imaging the 2017 solar eclipse) have at best a random chance of succeeding, while video footage is often hard to watch due to high payload rotation rates. While passive stabilization reduces the rotation rate, active pointing control is necessary for continuous target acquisition. Here we discuss a project built by students at Wright College called the Controlled Heading Automation Device (CHAD) that actively controls the heading of other instruments (i.e. cameras) and has been proven to work in flight. This project is open-source, 3D printable, made from cheap DIY electronics, and has been made available online (http://physi.cz/chad) so the high-altitude ballooning community can create, use, and adapt it to their own projects. We show how to create an attitude and heading reference system (AHRS) that can be used to continuously record payload orientation, which can supplement experiments where pointing information is needed. We then show how to have CHAD use the AHRS to automatically control the heading of other instruments in real-time without any other inputs.","PeriodicalId":355123,"journal":{"name":"Journal of High Altitude Ballooning","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115150634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Incorporating Redundant Systems to Capture the Kentucky Money Shot 采用冗余系统捕捉肯塔基州的金钱镜头

Journal of High Altitude Ballooning Pub Date : 2021-08-09 DOI: 10.31274/JHAB.13035

Virginia G. Smith, P. Heelan, E. Essex, S. Smith

{"title":"Incorporating Redundant Systems to Capture the Kentucky Money Shot","authors":"Virginia G. Smith, P. Heelan, E. Essex, S. Smith","doi":"10.31274/JHAB.13035","DOIUrl":"https://doi.org/10.31274/JHAB.13035","url":null,"abstract":"The Kentucky Eclipse Ballooning Project began in early 2015 when students and faculty from The University of Kentucky attended the NASA Marshall Space Flight Center BalloonSat Workshop in Huntsville, Alabama. The students accelerated their preparations after the Eclipse Ballooning Project Workshop hosted in Bozeman, Montana where they built and learned systems designed by Montana Space Grant. In 2016, the students began a sequence of 10 balloon launches in preparation for the total solar eclipse on August 21, 2017. In the early stages of this project, University of Kentucky students set the goal to capture footage of a separate high-altitude weather balloon in front of the solar eclipse, an image dubbed “The Kentucky Money Shot.” After establishing that goal, students began working on approaches and designs to capture this picture with one overarching theme: redundancy. Every aspect of the project from the number of balloons and imaging systems to tracking systems and launch procedures were designed with redundant aspects and through collaboration among the payload, ground station, launch, and mission control teams. The short time window of eclipse totality, 2 minutes 28 seconds, motivated design iterations throughout the progressive practice launches and ground tests including launching two balloons simultaneously, streaming and storing footage of the flight from multiple cameras, and using SPOT Trackers and Iridium systems as multiple tracking approaches. All of these practices and tests led to flying the final redundant designs on August 21st, 2017 to successfully capture “The Kentucky Money Shot”.","PeriodicalId":355123,"journal":{"name":"Journal of High Altitude Ballooning","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121377683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Computational Fluid Dynamics Study of Balloon System Tethered to a Stratosail 系在平流层帆上的气球系统的计算流体动力学研究

Journal of High Altitude Ballooning Pub Date : 2021-08-09 DOI: 10.31274/JHAB.13037

Jayakanth Loganathan, K. Lim, H. Lee, B. Khoo

{"title":"Computational Fluid Dynamics Study of Balloon System Tethered to a Stratosail","authors":"Jayakanth Loganathan, K. Lim, H. Lee, B. Khoo","doi":"10.31274/JHAB.13037","DOIUrl":"https://doi.org/10.31274/JHAB.13037","url":null,"abstract":"In this paper, we present a numerical study of a stratospheric balloon system tethered to a passive device, known as the Stratosail, for station-keeping operation. For scientific applications, stratospheric balloons that operate at altitudes between 15 and 20 km will need to maintain station over a fixed point above the earth for a prescribed period of time. This is a challenging problem due to the limitation of payloads and lack of an energy source. The present study uses computational fluid dynamics (CFD) simulations to analyze the drift velocity of such a balloon-Stratosail system under typical wind conditions in the stratosphere. The Stratosail is attached below the super-pressure helium balloon via a long and thin tether about 10 to 15 km below the balloon, providing a drag force to alter the flight path of the balloon. Its operation depends on the natural differences in the wind speed and wind direction at different altitudes in the atmosphere that act on the balloon and the Stratosail (spaced far apart by 10km to 15 km). In this study, we calculated the drag forces on the balloon and Stratosail for typical wind speeds at various altitudes in the stratosphere. The tether was also modelled as a cable joining the balloon and sail. With this model, the drift velocity of the system was calculated for various altitudes and the angle of attack of the sail.","PeriodicalId":355123,"journal":{"name":"Journal of High Altitude Ballooning","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127465778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Louisiana Space Consortium Student Sounding Balloon Program 路易斯安那太空联盟学生探空气球项目

Journal of High Altitude Ballooning Pub Date : 2021-08-09 DOI: 10.31274/ahac.8146

T. G. Guzik, S. B. Ellison, M. Stewart, J. Wefel, Dana Browne, J. Giammanco, D. Granger

{"title":"The Louisiana Space Consortium Student Sounding Balloon Program","authors":"T. G. Guzik, S. B. Ellison, M. Stewart, J. Wefel, Dana Browne, J. Giammanco, D. Granger","doi":"10.31274/ahac.8146","DOIUrl":"https://doi.org/10.31274/ahac.8146","url":null,"abstract":"Since the fall of 2003 the Louisiana Aerospace Catalyst Experiences for Students (LaACES) program has been providing university students a two semester project that culminates with the flight of a scientific balloon experiment. During the first semester students complete the Student Ballooning Course (SBC) which teaches basic skills necessary to develop a working scientific payload. The SBC consists of a series of lectures and activities providing instruction in electronics, programming, project management, balloon payload design, and introductory circuit assembly. The SBC introduces the BalloonSat, a sub-assembly designed at LSU for LaACES which contains a microcontroller, real-time clock and a four channel analog-to-digital converter. The second semester is spent on the design, development, testing and calibration of the payloads. Upon completion of the Flight Readiness Review, students travel to the NASA Columbia Scientific Balloon Facility (CSBF) in Palestine, Texas for integration, launch, recovery and science presentations. A flight capable Automatic Packet Reporting System (APRS) radio beacon armed with GPS and command capable cut down was developed to track the balloon during flight and to cut-down the payloads. Tracking vehicles are outfitted with radios tuned to APRS frequency and laptops displaying maps of the payload location. Here we describe LaACES; program development, tools and technologies, implementation, program, management issues and flight experiences.","PeriodicalId":355123,"journal":{"name":"Journal of High Altitude Ballooning","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133373839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Implementation of Simultaneous Multi-Streaming of Live Solar Eclipse Video via 5.8 GHz AirMax 通过5.8 GHz AirMax实现同步多流实时日食视频

Journal of High Altitude Ballooning Pub Date : 2021-08-09 DOI: 10.31274/AHAC.3451

Tenger Batjargal, Wookwon Lee, N. Conklin

引用次数: 1

Tropospheric Sounding with Low-Cost Particulate Matter Sensors 用低成本颗粒物传感器探测对流层

Journal of High Altitude Ballooning Pub Date : 2021-08-09 DOI: 10.31274/AHAC.3459

M. Potosnak, B. Beck-Winchatz, A. Mistry, P. Ritter

引用次数: 0

Techniques for Payload Stabilization for Improved Photography During Stratospheric Balloon Flights 平流层气球飞行中改进摄影的有效载荷稳定技术

Journal of High Altitude Ballooning Pub Date : 2021-08-09 DOI: 10.31274/JHAB.13036

J. Flaten, Christopher Gosch, Joseph B. Habeck

{"title":"Techniques for Payload Stabilization for Improved Photography During Stratospheric Balloon Flights","authors":"J. Flaten, Christopher Gosch, Joseph B. Habeck","doi":"10.31274/JHAB.13036","DOIUrl":"https://doi.org/10.31274/JHAB.13036","url":null,"abstract":"Payload-box rotation and swing are perennial challenges to achieving high-quality photography (typically videography) during weather-balloon flights to “near-space” (AKA the stratosphere). Continuous camera motion can lead to blurred still photos, nearly-impossible-to-watch video footage, and precludes time-exposure photography required for most astronomical imaging even though altitudes are reached where the daytime sky appears black. Apparently-random payload rotation, persisting even at altitude, can often exceed servo rotation rates and frustrate attempts to do active camera pointing. Here we discuss mostly-passive payload stabilization strategies we, and our collaborators, have used to mitigate and dampen both swing and rotation of suspended payloads on high-altitude balloon missions, primarily on ascent. In particular, we stress the importance of avoiding single “main” lines and of firmly coupling the payload stack to, as opposed to intentionally trying to decouple (rotationally) from, the neck of the balloon. We discuss consequences these strategies have on stack weight and also on the location of the parachute, sometimes displacing it from its normal location hanging between the neck of the balloon and the payload stack. We expect these payload stabilization techniques will be of particular interest to balloonists planning to photograph the total solar eclipse of August 2017.","PeriodicalId":355123,"journal":{"name":"Journal of High Altitude Ballooning","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129255015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Regener-Pfotzer Maximum During a Total Solar Eclipse 日全食期间的再生光泽度最大值

Journal of High Altitude Ballooning Pub Date : 2017-10-27 DOI: 10.31274/ahac.2

A. Swanson, Alynie Xiong, E. Agrimson, G. Mcintosh, Kaye Smith, Liam C. Taylor

引用次数: 0

Thermal Wake Studies During the August 21st 2017 Total Solar Eclipse 2017年8月21日日全食期间的热尾流研究

Journal of High Altitude Ballooning Pub Date : 2017-10-27 DOI: 10.31274/AHAC.3454

Kaye Smith, E. Agrimson, Brittany Craig, Rachel DuBose, Alynie Xiong, Grace Maki, Peace Sinyigaya, Vina Onyangoro-Robshaw, Ana Taylor, Rachel Lang, J. Flaten, G. Mcintosh

引用次数: 1

Directional Camera Control on High Altitude Balloons 高空气球的定向摄像机控制

Journal of High Altitude Ballooning Pub Date : 2015-06-20 DOI: 10.31274/AHAC.5575

M. Plewa, Brent M. Scharlau

引用次数: 3