Target Selection For The Pandora Smallsat: A Nasa Mission To Disentangle Stellar And Exoplanet Atmosphere Signals, Knicole Colón, Elisa Quintana, Thomas Barclay, Benjamin Hord, Jessie Dotson, Daniel Apai, Benjamin Rackham, Jason Rowe

Small Satellite Conference

The Pandora SmallSat mission was selected for implementation in 2021 as part of NASA’s Astrophysics Pioneers Program. Pandora is designed to monitor stellar variability while studying the atmospheres of transiting exoplanets via transmission spectroscopy. The transmission spectroscopy technique is one of the best methods to identify the makeup of exoplanetary atmospheres now and in the coming decade. However, stellar variations that occur from the presence of, for example, cool star spots, have been shown to contaminate the exoplanet atmosphere spectra obtained with high-precision transmission spectroscopy measurements. This stellar contamination leads to ambiguous interpretations when attempting to distinguish features like potential …

Performance Evaluation Of 1 U+ Module Of Water Ion Thruster With 7000 Ns Of Total Impulse, Yuichi Nakagawa, Hiroto Saito, Jun Asakawa

Small Satellite Conference

Water has emerged as a promising propellant for small satellite propulsion systems due to its inherent advantages in safety, affordability, and ease of handling. Traditional chemical propellants such as hydrazine pose significant safety risks due to their toxicity and explosiveness, while electric propulsion systems often rely on high-pressure gases like xenon and krypton, which present logistical and supply chain challenges. Although water exhibits lower propulsive performance, particularly in terms of specific impulse, its practical benefits have gained attention with the rise of CubeSats and nanosatellites, where mission requirements prioritize simplicity and safety over maximum efficiency. Various water-based propulsion technologies have …

Rhok-Sat: Investigating Perovskite Solar Cell Performance And Degradation In Low Earth Orbit Through A 1u Cubesat, José R. Pastrana, Anas Matar, Kerry Tang, Damian Nguyen, Marouf M. Paul, Mallory Miller, Phuc H. Nguyen, Jasper Scherz, Zheng Yu Wong, Jess G. Hamer, Olivia A. Kaufmann, Benjamin T. Wilson, B. Burnham

Small Satellite Conference

RHOK-SAT is a 1U CubeSat scheduled to launch in September 2025 aboard a resupply mission to the International Space Station (ISS) through NASA’s CubeSat Launch Initiative (CSLI) program. Its mission is to characterize the performance and degradation of six experimental perovskite solar cells in low Earth orbit for 12 months. Characterization consists of current-voltage measurement taken by one dedicated microcontroller per solar cell. Measurements are performed when the cells are in direct sunlight, determined via a quadrant photodiode. A silver-alloyed copper indium gallium selenide (ACIGS) solar cell serves as a reference for comparative analysis due to its well-characterized behavior. Each …

Extended Testing Of A Steam-Powered Propulsion System For Rapid-Orbit Corrections: A Viable Alternative To Chemical Propulsion, Marco Pavan, Ivan Timofeev, Vladimir Fedorov, Jinyoung Shin

Small Satellite Conference

The Steam Thruster One is an electro-thermal propulsion system capable of delivering a thrust level up to 20 mN, using 20 W of power and reaching a total impulse of about 1200 Ns in its 2U configuration. The system operates solely on low-pressure water, ensuring complete safety for integration and operations both on the ground and in space. The propulsion cycle involves converting liquid water into superheated steam, which is then expanded through a nozzle to generate thrust.

The propulsion system was tested in space in Q3 2023 and Q2 2024, where it successfully demonstrated short propulsion manoeuvres. However, for …

Stp-H12-Vantage: Combining Visual And Event-Based Sensing For Earth Observation, Diego Wildenstein, Michael J. Cannizzaro, Ian Peitzsch, Linus Silbernagel, Joshua Poravanthattil, Peter Drum, Mark Hofmeister, Cole Bowman, Natan Herzog, Evan W. Gretok, Alan D. George

Small Satellite Conference

Conducting Earth-observation tasks from orbit can provide valuable research insights in fields such as meteorology, geology, forestry, cartography, and defense. Developing and building space payloads for Earth observation poses significant challenges, including the high cost of radiation-tolerant systems, the widening gap between current state-of-the-art apps and the capabilities of space-grade processors, and the increase in fidelity of modern sensors. Many Earth-observation missions typically collect data by leveraging visual and/or multispectral imagers. However, when using conventional imaging, there can be significant losses in context due to the frame-based operation of these sensors, as well as both relevant and irrelevant data mixed …

Microgravity Testing Of A Thermal Start Basket For Propellant Repositioning, Hugh Chen, Álvaro Romero-Calvo

Small Satellite Conference

CubeSat cold-gas propulsion increasingly relies on two-phase propellants stored in conformal tanks. However, state-of-the-art propellant management strategies for these systems result in significant portions of the tank being occupied by vapor, reducing the amount of storable propellant. They also require high power input for vapor expulsion, increasing mission complexity and limiting operational lifetime. These challenges highlight the need for a more robust propellant management approach. The VAporization for PrOpellant Repositioning (VAPOR) experiment investigates the feasibility of repositioning an ullage gas bubble of R-236fa using thermally-induced phase change in various propellant management devices (PMD). These devices utilize a heat source to …

Development Of The Music Hall Thruster Family For Small Satellite Missions: Current Status And Upcoming Missions, George-Cristian Potrivitu, Matteo Laterza, Khoo Kai Sheng, Nunki Pontianus, Suryono Gunawan Ali, Justin Ong, Dylan Lim, Zhuo Xuan Chua, Wei Jian Joshua Lim, Willem Frederik Von Lynden, Garreth Christopher Anwar, Mooi Meng Wai, Jian Wei Mark Lim

Small Satellite Conference

The MUSIC – MUlti-Stage Ignition Compact – Hall thruster family is developed to operate at system power below 100 W making it ideal for small satellites ranging from 3 U to a few 100 kg. The concept relies on the versatility of the MUSIC thruster unit which can be operated in various modes, and the modularity of the peripherals, i.e., the power and electronic control units, and propellant management assembly. This contribution expands the existing scarce literature on low-power Hall thruster systems that are qualified for flight, presents an overview of the capabilities of the MUSIC Hall thruster, past and …

Ecaps High-Performance Green Propulsion – Enabling Tactically Responsive Space Missions, Wilhelm Dingertz, Peter Thormählen, Odysseas Christofi

Small Satellite Conference

In a rapidly evolving geopolitical landscape where space is increasingly viewed as the fourth operational domain, tactically responsive launch capabilities and in-orbit maneuverability are critical. The ability to pre-load spacecraft and maintain them in a ready-to-launch state enables quicker response times, essential for strategic operations. Longterm storable, non/low-hazardous "green" propellants, such as ECAPS’ LMP-103S based on Ammonium DiNitramide (ADN), are key to this agility. These propellants offer improved performance, reduced environmental and operational risks, and facilitate faster spacecraft processing and storage. ECAPS High-Performance Green Propulsion (HPGP) technology has achieved extensive flight heritage with its 1N thruster, across 30+ missions, typically …

Consolidated Simultaneous Ranging And Clock Synchronization With Application To Positioning In Cis-Lunar Space, Junichiro Kawagichi, Shingo Nishimoto

Small Satellite Conference

The AOWR scheme functions as a set of transceivers connecting two entities: the ground station and the spacecraft. The phase difference information obtained from both sides intrinsically contains data related not only to the range but also to the clock difference simultaneously. The AOWR scheme can synchronize the clock onboard the spacecraft regardless of the distance. In cis-lunar space due to poor geometric configurations, until the position is determined, the clock difference cannot be established. It drastically improves and reduces the dilution-of-precision index. The paper will present the outcomes confirmed through demonstration experiments utilizing hybrid devices related to the GNSS …

Standards And Schematics For Intelligent Extensible Mission Architectures In Space, Evana Gizzi, Alan Gibson, James Marshall, Shannon Bull, Timothy Chase Jr., Jonathan Davis, Matthew Dosberg, Michael Johnson, Peter Knudtson, John Lucas, Michael Monaghan, Chris Robberts, Daniel Rogers, Bethany Theiling, Julie Breed, Larry Kepko, Carrie Vuyovich, Connor Firth, Lily Clough, Aaron Woodard, Brian Kempa, Caleb Adams, Robin Onsay, Sam Pedrotty, James Berck

Small Satellite Conference

As the space sector trends toward complex mission types, the demand for multi-asset, multi-generational, and multi-organizational paradigms has grown. It is critical that the spaceflight community builds the infrastructure needed to realize these mission architecture goals. To this end, we present a standard and schematic for intelligent extensible mission architectures, which will allow missions of the future to be distributed, heterogeneous, incremental, and interoperable for enhanced flexibility, adaptability, and responsiveness in space. We begin by describing a motivation for intelligent extensibility, followed by a review of related work in standards and autonomous multi-agent systems. Next, we present the theoretical definition …

Machine Learning For Interference Detection And Mitigation On Space Telecom Software-Defined Radio Signals, Adhémar De Senneville, Dennis Ogbe, Zaid Towfic

Small Satellite Conference

Detecting anomalies and interference is an essential capability of contemporary flight radios and ground support equipment. The advent of software-defined radios (SDRs) has made this task feasible. These radios allow real-time monitoring and potential mitigation of interference by adjusting frequency bands. This feature is useful as spacecraft components degrade and interference from other instruments may disrupt communications. The implementation of automated anomaly detection systems on SDRs can enhance both spacecraft and ground station testing by identifying abnormal waveforms and potential interference in communication channels. First, this work investigates how machine learning compares against classical signal processing approaches for the anomaly …

Preliminary Scale Analysis Of Formation Flying For Direct-To-Device Communication Using Ultra-Small Satellites, Sumio Morioka, Harunobu Kobayashi

Small Satellite Conference

Direct-to-Device (D2D) communication in satellite constellations is attracting attention for enabling direct links to mobile terminals without large ground antennas. This approach could extend mobile coverage and support future Cyber-Physical System (CPS) use cases, such as connected vehicles and IoT sensing.

To overcome data rate limitations caused by the small antenna size on individual satellites, we propose a formation-flying system that constructs a large-aperture phased array antenna [1]. Our analysis shows that a swarm of tens of thousands of pico- or femto-class satellites can meet the required link budget, enabling broadband D2D communication with practical.

Compact Satellites For Big Insights: Mission Analysis Of A 16u Cubesat For High-Resolution Earth Observation, Abdelmadjid Lassakeur, Kamel Djamel Eddine Kerrouche, Imène Taleb, Abdelhak Benikhlef, Mohammed Amine Meghabber

Small Satellite Conference

The demand for high-resolution Earth observation data has been growing rapidly, driven by applications in environmental monitoring, disaster response, urban planning, and defense. Governments, research institutions, and private companies increasingly rely on detailed satellite imagery to make informed decisions. However, traditional Earth observation satellites are often expensive and require long development timelines, creating a need for more compact and cost-effective solutions. Recent advancements in CubeSat technology, particularly in high-performance Attitude Determination and Control Systems (ADCS), have significantly expanded the capabilities of nanosatellites. These improvements have made it possible for smaller satellites to achieve imaging performance once limited to larger spacecraft. …

Orbital Motion Coordination Using Bio-Inspired Optical Sensing And Feedback, Arif Billah, Imraab A. Faruque

Small Satellite Conference

Summary: Multi-satellite coordinated missions can improve upon larger solitary satellite missions through greater flexibility, efficiency, scalability and redundancy. This study considers a more diverse approach to in-orbit motion coordination that reduce dependence on communication links and absolute position references. The non-linear relative equations of motion applied to a chief satellite and a deputy target in the LEO orbit are considered and a feedback control system to facilitate multi-satellite relative motion coordination is designed. The feedback controller relies on on-board optical sensor measuring optic flow signal, similar to the bio-inspired feedback-controlled systems used for various aerial operations. Performance in orbit is …

The Remote Capability-Auctioning Planner (Recap): A Decentralized Multi-Agent Control System Using Classical Planning, Behavior Trees, And Remote Task Auctions, Connor Firth, Miles Bengtson, Lorin Achey, Alex Barrie

Small Satellite Conference

Poster presented during the 2025 SmallSat Conference.

Application Of Particle Swarm Optimization For Tuning Pi Controllers In Cmg-Driven Pmsm Systems, George Claudiu Andrei, Rocco Pisto

Small Satellite Conference

This work presents the application of an automated PI controller tuning method based on Particle Swarm Optimization (PSO) for Control Moment Gyroscope (CMG) systems. CMGs are critical components in aerospace systems, offering high-torque amplification and precise attitude control capabilities. Their superior performance compared to Reaction Wheels (RWs) makes them ideal for demanding applications such as spacecraft orientation and agile maneuvering. At the core of CMG operation are Permanent Magnet Synchronous Motors (PMSMs), which are typically controlled using Field-Oriented Control (FOC) for accurate response. FOC relies heavily on the performance of PI controllers within the current and speed control loops. Achieving …

Development Of A Cubesat-Sized Hybrid Chemical Propulsion System For In-Orbit Demonstration, Sheila Langa, Ryosuke Kawabata, Izumi Chimoto, Yasuhiro Fukumoto, Taejun Son, Gonzalo Campos, Shota Hirai, Landon Kamps

Small Satellite Conference

Letara Ltd. is a company based in Hokkaido, Japan, specializing in in-space hybrid chemical propulsion systems. Letara has been actively researching CubeSat-sized hybrid chemical thrusters with a focus on fuel optimization and improved scalability for small satellite applications.

The first project is based on a 2U-sized thruster with the aim to demonstrate a safe, sustainable, and scalable miniaturized hybrid propulsion system in orbit. The technology demonstration is scheduled for 2026.

Development Of The Optical Deep-Space Instrument For Navigation (Odin), Rebecca Inman, Riana Pecourt, Ronney Lovelace, Max Marshall, Ava Thrasher, John Christian, William Driessen

Small Satellite Conference

The Optical Deep-space Instrument for Navigation (ODIN) is a customizable, multiple camera, multiple field-of view (FOV) software and hardware sensor package. The instrument and software design are intended to make optical navigation (OpNav) methods more widely available to small satellite missions.

The ODIN flight software will have autonomous functionalities such as target determination, attitude estimation, and horizon-based position estimation, while still offering the option for manual modes to ease mission operation constraints. The flight software is built in core Flight System (cFS) and is designed to be agnostic to camera selection and placement.

Currently, ODIN is in its second year …

Eeetester – Reliable Cubesat Platform For In-Orbit Testing Of The Space Heritage Of Korean-Made Eee Parts, Ki-Ho Kwon, Sanggoo Kim, Geuk-Nam Kim, Jooin Lee, Jungkyu Lee, Seongwhan Lee

Small Satellite Conference

Poster presented during the 2025 SmallSat Conference.

End-To-End Lifecycle Testing With A High-Altitude Balloon, Benjamin Skinner, Patrick Walton, Alex Laraway, David Long

Small Satellite Conference

Many small satellite mission failures could be prevented with further end-to-end testing in relevant environments. No test fully matches the spaceflight environment, but partial tests can still be valuable. We developed a high-altitude balloon system for testing our CubeSat radars.

Ensuring Reliable Radiation-Hardened Power Solutions For Versal Fpgas, Bhavika Kagathi

Small Satellite Conference

The use of Field Programmable Gate Arrays (FPGAs) in satellites is common due to their ability to be programmed in real time and their immense data processing power which is vital for the increasing on board processing directly on the satellite. Today’s space grade FPGAs, such as AMD’s Adaptable Compute Acceleration Platform (ACAP), include machine learning and artificial intelligence capabilities, but come with stringent power constraints. These FPGAs are designed to operate with low voltages and high currents, leading to demanding power supply requirements. Failure to follow the strict power guidelines can result in unreliable power up and potential damage …

Exploring Beamed Energy Propulsion: Development And Application Of A Configurable Simulation Tool, Charles Cundiff, Michael Harrington, Victoria Coverstone, John Larosa

Small Satellite Conference

Laser sailing enables propellantless spacecraft propulsion by transferring momentum from a directed energy beam to a reflective sail. Unlike traditional chemical or electric propulsion systems, laser sails decouple propulsion performance from onboard mass and stored energy, presenting an opportunity for lightweight, scalable spacecraft maneuvering. This work develops and applies a simulation framework in FreeFlyer to evaluate the performance of laser sailing across a range of orbital missions, with emphasis on low-mass systems, such as CubeSats.

The simulation model incorporates several critical physical effects, including beam divergence, atmospheric attenuation, sail material reflectivity and emissivity, thermal loading, and realistic station visibility. The …

Generation And Detection Of Structured Radio Waves In Small Satellites, Tsukasa Funane, Yosuke Tanabe, Hisatoshi Kimura, Makoto Ito, Koichi Watanabe

Small Satellite Conference

Background

• Small SAR (synthetic aperture radar) satellite constellations are developing rapidly.
• The theoretical richness of OAM is expected to be used for radar imaging.
• OAM radar uses spiral wavefronts by applying phase differences to spatially arranged antenna elements.

Purpose

• Develop and experimentally validate a method for generating, transmitting,and detecting structured radio waves—particularly vortex modes carrying orbital angular momentum

Hardening And Advancing Cots Fpga/Gpu Integrated Circuits For The Realization Of Space-Grade System-On-Module, Kwen-Siong Chong, Wei Shu, Joseph S. Chang

Small Satellite Conference

We propose radiation-hardening solutions to mitigate single-event-latchup (SEL) and single-event-upset (SEU) on Commercial-off-the-Shelf (COTS) Field-Programmable-GateArrays (FPGAs) and/or Graphic-Processing-Units (GPUs), advancing COTS FPGAs/GPUs suitable for the realization of spacegrade radiation-tolerant system-on-module (SoM). Our solutions include enhanced power reliability solutions to mitigate SEL, and enhanced data integrity solutions to mitigate SEU. We demonstrate our solutions on an SoM embodying the Xilinx Zync UntraScale+ FPGA, 32GB eMMC, 5 DDR4 memories, and a 32MB QSPI flash. Collectively, on the basis of the (performance × cost) figure-of-merit, our radiation-tolerant SoM is several magnitudes higher than present-art solutions.

Impact Of Physical Interfaces And Interconnectivity On Cubesat Complexity, Development Schedule, And Cost: A Comparative Analysis Of Curtis 3u, Kitsune 6u, And Vertecs 6u, Eyoas Ergetu Areda, Rodrigo Cordova-Alarcon, Hriokazu Masui, Necmi Örger, Kei Sano, Mengu Cho, Takao Nakagawa

Small Satellite Conference

Background

• CubeSat designs vary in their physical interfaces and subsystem interconnectivity, significantly affecting assembly effort, design complexity, and mission reliability.
• This study aims to quantify these effects using standardized assembly and complexity metrics combined with reliability assessment.

Improving Attitude Determination Control System In Small Satellites For Enhancing Data Observation And Enabling Quantum Communication, Marco Ruano

Small Satellite Conference

The growing market for small satellites requires agile, efficient and compact attitude and determination control systems (ADCS) to improve mission performance, enable optical satellite communication (quantum) and improve data observation, increasing precision and agility in control. Reaction wheels are the most widely used active attitude control systems; they offer the advantages of high angular momentum and reduced space, despite problems such as saturation and maximum torque limitations that seriously limit the operability of their satellites, including long pointing wait times and the recovery of momentum-generating capacity (desaturation).

Night Sky Brightness Caused By Orbital Reflectors, Erkin Sidick, Ben Nowack, Tristan Semmelhack

Small Satellite Conference

We are in the process of developing a system which redirects the incoming sunlight to a stationary ground target after sunset and before sunrise. One of the purposes is to extend operating hours of solar-farms to after sunset and before sunrise. Our system contributes to light pollution as a by-product. We have developed an optical model to predict the night sky glow caused by the light coming from an orbital reflector. In this paper we will review some work done by others on the night sky brightness caused by artificial city lights first, then present our results of model predictions …

Pioneering Multi-Band Communication For Smallsats: Overcoming Technical Barriers With Innovative Solutions, Lucas Felderhoff, Mathias Reibe

Small Satellite Conference

Communication links are required to be more flexible and more efficient. A multi-band, multi-protocol, and multi-way communication architecture for telemetry/telecommand (TM/TC) functionalities as well as high-speed-data-rate broadband payload transmission is shown. The focus is set on hybrid configurations such as S-Band transceivers paired with X-Band transmitters and combinations of S- and Ka-Band systems, which offer enhanced operational flexibility. Such solutions will be provided in a compact single unit for efficient communication.

A Dynamic Wireless Channel Emulator For Realistic Cubesat Testing, David Michelson, Eisha Khan, Max Xiang, Yun Xing, Ada Li, Ryan Manak

Small Satellite Conference

Failure of the communication subsystem has been responsible for approximately 20% of small satellite mission failures over the period between 2000 and 2019. Insufficient system-level integration and testing has been cited as one reason why corrective actions weren’t taken before launch to prevent such failures. Here, we introduce a relatively inexpensive GTEM-cell-based dynamic channel emulator that will permit designers of CubeSats operating at frequencies up to 20 GHz to evaluate their spacecraft’s communications over multiple simulated passes with the spacecraft in as close to over-the-air flight condition as possible, including fully deployed antennas. Using this over-the-air channel emulator allows the …

An Updated Architecture For A Modular And Scalable Edge Computing System For Small Spacecraft, Kelly Williams, Michael Pham, Zachary Gaines, Alex Mariano, Janelle Tran, John Pollak, Luca Lanzillotta, Phylis Nelson

Small Satellite Conference

SCALES (Spacecraft Compartmentalized Autonomous Learning and Edge-computing System) is a novel hardware/software system for the enhancement of machine learning onboard small spacecraft. Through the first year of development under the NASA University SmallSat Technology Partnerships (USTP) program the team has been able to design and develop the first prototype of the system.

SCALES combines the use of commercial off-the-shelf hardware and the open-source F’ software framework developed by JPL. The system is aimed at coupling radiation tolerant flight computer with the capability of high-performance edge computers. The radiation tolerant flight computer is responsible for the operation of the spacecraft and …