Digital Commons Network^™

Lessons Learned From The Gt-1 1u Cubesat Mission, Maximilian Kolhof, William Rawson, Radina Yanakieva, Andrew Loomis, E. Glenn Lightsey, Sterling Peet

Small Satellite Conference

With more universities conducting low-cost small satellite development programs, resources for students starting off in satellite design are essential to avoid common pitfalls. Hardware integration and testing of the GT-1 CubeSat revealed both design flaws and strengths that led to a comprehensive list of lessons learned applicable to future CubeSat missions at the Georgia Institute of Technology Space Systems Design Laboratory (SSDL) and within the broader academic community. GT-1 was originally slated to be designed, built, and delivered in nine months with an orbital lifespan of around seven months. However, various schedule delays resulted in the mission spanning over two …

The Undergraduate Cubesat Experience At The University Of Minnesota, Meredith Wieber, Lindsay Glesener, Demoz Gebre-Egziabher, Marie Wulff, Trevor Knuth, Kyle Houser, Athanasios Pantazides

Small Satellite Conference

Building a satellite is a large undertaking with a lot of moving parts. Undergraduate students have complicated schedules with even more moving parts. Running a team of 60+ undergraduates toward the goal of launching a satellite is therefore quite the managerial challenge. Detailed on this poster are some specific challenges, along with strategies for mitigating them, that the UMN Small Satellite Research Lab faces in their work toward launching two small satellites.

Tumnanosat, 1u Kibocube Nanosatellite Developed At The Technical University Of Moldova, Viorel Bostan, Nicolae Secrieru, Valentin Ilco, Vladimir Melnic, Alexei Martiniuc, Vladimir Varzaru

Small Satellite Conference

The National Center for Space Technologies (NCST) of Technical University of Moldova (TUM) has been oriented towards a series of nanosatellites, according to the international standard CubeSat. In 2019, NCST participated in the fourth round of the KiboCUBE Program with the nanosatellite "TUMnanoSAT".

KiboCUBE Program is a collaboration between UNOOSA and JAXA that aims to provide to the United Nations Organization members opportunity to launch CubeSat satellites developed for educational and research purposes.

The NCST team was selected by the Japan Aerospace Agency (JAXA) and the United Nations Office for Outer Space Affairs (UNOOSA) for the fourth round of the …

Power Supply For Advanced High Current Payloads, Timothy Anderson, Edmund Burke, Alexander Anthougies

Small Satellite Conference

Protect, Prevent and Enclose (PPE) technologies are employed to stop cell failure propagation, limit cell-to-cell thermal transport, and safely contain flames and debris.

Code In Space: Out Of This World Programming Opportunity For Students, Bassam Alfeeli, Nada Alshammari

Small Satellite Conference

This initiative was conceived to empower students to contribute to the advancement of satellite communication technology while also preparing future professionals to operate the next generation of communication satellites

Data Modelling And Code Automation For Space Systems Software, David Santos Gil, Mukesh Jha, Hessa Alshamsi

Small Satellite Conference

Due to the autonomous nature of spacecraft, on-board devices feature relatively complex functionality in their software, including interface(s) that provide telecommands and telemetry. Once in space, the devices are physically inaccessible and even a small defect can cause a major failure from which recovery is impossible. To prevent defects with such consequences, the development of on-board software for space applications requires a substantial investment in quality and additional manual work results in increased cost. Therefore, it is necessary to consider opportunities that reduce manual work while minimizing the impact in quality.

This paper presents the particular solution adopted for the …

Spaceteamsat1 - Giving High-School Students A Hands-On Experience In Space Software Development, Jan Pac, Raphael Böckle, David Freismuth, Benjamin Geislinger, Thomas Hirschbüchler, Patrick Kappl, Peter Kremsner, Tim Munhowen, Jakop Riepler, Daniel Schloms, Paul Schmitt, Sundas Syed, Nikolas Thiel, David Wagner

Small Satellite Conference

Educational Mission

• Enable high-school students to run software experiments on an educational payload (Raspberry Pi platform)
• Students will code their programs in Python
• Code will be sent to CubeSat via RF communication
• Code will run on educational payload
• Results will be downlinked and handed over to the students
• Students will be supported during the entire mission and receive a development kit for coding

Creating A Marketplace For A Constellation As A Service, Brent Horine

Small Satellite Conference

With the proliferation of diverse small satellites in orbit, many connected via mesh networks, an opportunity exists to exploit fallow capabilities in satellites for which the original mission is complete or in a sustaining phase that requires less than 100% capacity. We outline a marketplace to facilitate matching of needs and capabilities via a multi-agent negotiation framework. Agents have knowledge of the capabilities, constraints, configuration and load on their represented satellite. This knowledge can be imperfect at least temporarily due to communication constraints. Exchanges of information during the negotiation in the form of arguments can improve overall knowledge. Argumentation in …

Cubesat Constellation For Interplanetary Market Intelligence And Private Claims In Space, Jacob Irwin, Eric Ward

Small Satellite Conference

Mission Objectives

• Deployment of Beacons, each rendezvous with NEAs' Small-Body Orbit
• Data Collection comprising a universal cadastre
• Sensors/Instrumentation: Geolocations and In-Space Activity Capture
• Integration with Service Providers through API
• Cooperation with Domestic and International Regulatory Agencies

Development Of An Operating Strategy For On-Demand Earth Observation Missions Of The Diwata-2 Microsatellite, Edgar Paolo Violan, Yuji Sato, Yuji Sakamoto, Shinya Fujita, Julie Ann Boanatao, Toshinori Kuwahara, Kazuya Yoshida

Small Satellite Conference

Diwata-2 is the Philippines’ 2nd microsatellite developed by Tohoku University, Hokkaido University, University of the Philippines, and the Philippine Department of Science and Technology. Its primary purpose is gathering remote sensing data through imaging areas of interest for the Philippines. This paper presents the study of Diwata-2’s initial Earth observation pointing performance, investigation of its Attitude Determination and Control System, the tuning of its Star Tracker sensor parameters, the in-flight target pointing calibration, and the sequential scheduling of its components forming an operation strategy for an effective on-demand earth observation mission. This operation strategy has managed to improve the satellite’s …

How Skywatch Uses Serverless Cloud Computing To Aggregate Eo Data For The Masses, Roland Sing

Small Satellite Conference

Problem

• Petabytes of data to process and distribute
• Pent up demand, bottlenecked by immature industry distribution vehicles and antiquated pricing structures

Goals

• no humans in the loop
• easy consumption of data by beginners and experts alike
• machine to machine focus
• low cost to purchase data
• low cost to operate
• timely processing and delivery (minutes not days)

Intelligence And Autonomy In The Sat4eo+ Satellite, Murray Kerr, Stefania Cornara, Antonio Ramirez

Small Satellite Conference

The responsiveness of an Earth observation (EO) service, in terms of the time from the initiation of satellite tasking after an End User request is accepted, until the availability of the Earth Observation product to the End User, is a key metric in many applications, such as security, disaster monitoring and nowcasting, and more generally in enhanced-NRT services.

Elecnor DEIMOS is currently developing its next proprietary Very-High Resolution (VHR) small satellite [1][2], Sat4EO+, to meet current and upcoming market needs for Earth Observation products derived from a sub-meter optical imaging capability. Sat4EO+ is an agile low-cost ~200kg VNIR optical satellite, …

Osam-2 Capabilities, Trey Clinton, Sean Lantto

Small Satellite Conference

Archinaut Development

• Phase 1: Additive Manufacturing proven in a simulated LEO environment in June 2017
• Phase 1 Option: Combination demonstrated in a simulated LEO environment in September 2018
• Phase 2: Class D NASA flight demonstration mission to autonomously manufacture polymer beams on orbit

Proliferated Leo Autonomy Architecture For Capability With Scalability, Jaime Ramirez, Caleb Royer, Sanjeev Seereeram, Owen Brown, Robert Polutchko, Michael Renner

Small Satellite Conference

A next generation space architecture focused on proliferated low-Earth Orbit (p-LEO) constellations holds the promise of improved situational awareness, responsiveness, and resiliency.

A variety of proliferated space constellation efforts are underway in the National Security Space Arena, all demanding innovations in ubiquitous satellite command, control, and communications.

Whether communications, science, or defense missions, the expansion into PLEO constellations drives new demands upon autonomy, software, and communications architectures.

Previous groundbreaking autonomy work was performed on the Deep Space 1 mission, which eventually led to NASA Mars and Earth Observing-1 autonomy. In Autonomous Rendezvous, Proximity Operations, and Docking (ARPOD), Defense Advanced Research …

Proliferated Leo Constellation Modeling & Simulation With Information Assurance, Leigh Anderson, David Anderson, Jeremy Fix

Small Satellite Conference

Proliferated Low Earth Orbit (pLEO) constellations allow for network, on-orbit processing, and battlefield management resiliency through disaggregation of the traditionally small number of high-value space assets. pLEO constellations present unique challenges. Developing a complex mesh network able to dynamically recover from active counterspace, cyber-security, and environmental threats, while providing uninterrupted data-center-like processing, requires advanced modeling capability throughout its buildout. Management of resource utilization, task migration, data fusion, software and firmware updates, and distribution of intelligence across the constellation requires complex integration and autonomy. Mission execution requires secure communication between the pLEO constellation and all consumers. The path to developing solutions …

Review Of Producing The Archival Body, Lara Michels

Journal of Western Archives

Review of Producing the Archival Body by Jamie Lee.

The Veins That Lighten Dearth: Documenting Hidden Collections In Rural California, Jillian M. Ewalt

Journal of Western Archives

This case study discusses an archival consulting project to document and preserve hidden collections in rural northern California. The paper provides an overview of the collecting institution (the Mother Lode Land Trust), the collections and their historical context, and the consulting process. The author highlights processing strategies to improve preservation and description while developing a post-custodial approach to managing collections in a rural, community-based archives setting.

Attribution Of Responsibility After Failures Within Platform Ecosystems, Brian Dunn, Matthew L. Jensen, Ryan Ralston

Data Analytics & Information Systems Faculty Publications

Increasingly, new hardware and software are embedded within ecosystems that include a platform and modules. Ideally these ecosystems perform reliably. However, if an ambiguously sourced failure occurs within one of these ecosystems, users are left to distribute blame across the various components of the ecosystem. The actual distribution of this blame, however, can be difficult to predict. This study investigates attribution of blame and discontinuance recommendations for ecosystem components after an ambiguously sourced failure. To extend platform ecosystems and attribution theory, we conducted a scenario-based experiment investigating the negative consequences of failure for platform and module components and the contingent …

Collaborative Research: L Treb: Predicting The Success Of Montane Species In An Era Of Climatic Upheaval, Zachariah Gompert

Funded Research Records

No abstract provided.

Considering The Wide World Of Wild Pig Management, John M. Tomeček

Human–Wildlife Interactions

This is the letter from John M. Tomeček, associate editor for the special issue on wild pigs in Human–Wildlife Interactions.

Household Perceptions And Patterns Of Crop Loss By Wild Pigs In North India, Bivash Pandav, Lakshminarayanan Natarajan, Ankit Kumar, Ajay A. Desai, Banteibor Lyngkhoi

Human–Wildlife Interactions

Loss to cultivated crops by wild pigs (Sus scrofa) is widespread and can jeopardize low-income farmers. In India, although there is lot of political interest in the problem, efforts to understand the patterns, correlates, and underlying reasons for wild pig conflict continue to be minimal. We quantified loss of wheat (Triticum aestivum) to wild pigs and assessed the spatial patterns of damage in a forest settlement of Van Gujjar (Haridwar, India), which is a dairy-based pastoralist community. We chose a 4-km² cultivated area comprising 400 farmlands (each measuring 0.8 ha and belonging to a family) and …

Interactions Between Humans, Crocodiles, And Hippos At Lake Kariba, Zimbabwe, Ivan Marowa, Joshua Matanzima, Tamuka Nhiwatiwa

Human–Wildlife Interactions

Human–wildlife conflicts (HWCs) are on the increase due to shrinking space that results in increased competition for land, water, and other natural resources between humans and wildlife. Investigating the occurrence of HWCs is important in that the results can be used to formulate better management policies and strategies. In this paper, we describe the nature of HWCs emerging between humans and the Nile crocodile (Crocodylus niloticus) and between humans and the African hippopotamus (Hippopotamus amphibius; hippo) on Lake Kariba, Zimbabwe. Lake Kariba is the second largest manmade lake by volume in the world. Conflicts involving humans …

Residential Water Meters As Edge Computing Nodes: Disaggregating End Uses And Creating Actionable Information At The Edge, Nour A. Attallah, Jeffery S. Horsburgh, Arle S. Beckwith Jr., Robb J. Tracey

Publications

We present a new, open source, computationally capable datalogger for collecting and analyzing high temporal resolution residential water use data. Using this device, execution of water end use disaggregation algorithms or other data analytics can be performed directly on existing, analog residential water meters without disrupting their operation, effectively transforming existing water meters into smart, edge computing devices. Computation of water use summaries and classified water end use events directly on the meter minimizes data transmission requirements, reduces requirements for centralized data storage and processing, and reduces latency between data collection and generation of decision-relevant information. The datalogger couples an …

Compounding Hazards And Intersecting Vulnerabilities: Experiences And Responses To Extreme Heat During Covid-19, Olga V. Wilhelmi, Peter D. Howe, Mary H. Hayden, Cassandra R. O'Lenick

Environment and Society Faculty Publications

Extreme heat is a major threat to human health worldwide. The COVID-19 pandemic, with its complexity and global reach, created unprecedented challenges for public health and highlighted societal vulnerability to hazardous hot weather. In this study, we used data from a three-wave nationally representative survey of 3036 American adults to examine how the COVID-19 pandemic affected extreme heat vulnerability during the summer of 2020. We used mixed effects models to examine the roles of socio-demographic characteristics and pandemic-related factors in the distribution of negative heat effects and experiences across the United States. The survey findings show that over a quarter …

Collaborative Research: Deciphering The Role Of Extreme Rainstorms And Hydroclimatic Regime On Arid Escarpment Retreat And Sub-Cliff Slope Evolution, Joel Pederson

Funded Research Records

No abstract provided.

Benchmarking Nimrod Continuum Kinetic Formulations Through The Steady-State Poloidal Flow, Joseph R. Jepson, Chris C. Hegna, Eric D. Held, J. Andrew Spencer, B. C. Lyons

All Physics Faculty Publications

In this work, continuum kinetic formulations are employed as a mechanism to include closure physics in an extended magnetohydrodynamics model. Two continuum kinetic approaches have been implemented in the plasma fluid code NIMROD [Sovinec et al., “Nonlinear magnetohydrodynamics with high-order finite elements,” J. Comput. Phys. 195, 355 (2004)] including a Chapman–Enskog-like (CEL) formulation and a more conventional δf approach. Ion kinetic closure schemes are employed to describe the neoclassical flow properties in axisymmetric toroidal geometry. In particular, predictions for steady-state values of poloidal flow profiles in tokamak geometry are provided using both the δf formulation and two different solution …

Computational Frontiers In The Strong Gravity Regime, Maria Rodriguez

Funded Research Records

No abstract provided.

Alfanet: A Database Of Alfalfa-Bacterial Stem Blight Protein–Protein Interactions Revealing The Molecular Features Of The Disease-Causing Bacteria, Raghav Kataria, Rakesh Kaundal

Plants, Soils and Climate Student Research

Alfalfa has emerged as one of the most important forage crops, owing to its wide adaptation and high biomass production worldwide. In the last decade, the emergence of bacterial stem blight (caused by Pseudomonas syringae pv. syringae ALF3) in alfalfa has caused around 50% yield losses in the United States. Studies are being conducted to decipher the roles of the key genes and pathways regulating the disease, but due to the sparse knowledge about the infection mechanisms of Pseudomonas, the development of resistant cultivars is hampered. The database alfaNET is an attempt to assist researchers by providing comprehensive Pseudomonas proteome …

Utah Girls, Young Women, And Physical Activity, Kim Buesser, Rachel Myrer, Susan R. Madsen

Marketing and Strategy Faculty Publications

The benefits of physical activity are well documented and improve all aspects of health and overall wellbeing. Globally, on average, 37.1% of women are insufficiently physically active while only 23.4% of men are; this trend is also found in Utah, where 19.4% of women are insufficiently physically active while only 17.6% of men are. While women often live longer than men, they are frequently in worse health. Physical inactivity contributes to the development and severity of chronic diseases including cardiovascular disease, diabetes, and hypertension. In addition to affecting physical health, physical inactivity is also associated with poor mental health. Physical …

Human Appropriation Of Net Primary Production: From A Planet To A Pixel, Suman Paudel, Gustavo A. Ovando-Montejo, Christopher L. Lant

UAES Publications

Human appropriation of net primary production (HANPP) is a substantial improvement upon 20th century attempts at developing an ecological footprint indicator because of its measurability in relation to net primary production, its close relationship to other key footprint measures, such as carbon and water, and its spatial specificity. This paper explores HANPP across four geographical scales: through literature review, the planet; through reanalysis of existing data, variations among the world’s countries; and through novel analyses, U.S. counties and the 30 m pixel scale for one U.S. county. Results show that HANPP informs different sustainability narratives at different scales. At the …