Digital Commons Network^™

Magnetic Balancing For Microvibration Reduction In Passive Magnetic Bearings For Smallsat Reaction Wheels, Deckers Niel, Baekeland Mante, Cuypers Cedric, Seiler Rene, Vandepitte Dirk, Delabie Tjorven

Small Satellite Conference

Reduction and mitigation of microvibrations constitutes a crucial field of interest in the research of spacecraft reaction wheels. This applies all the more so in small satellites, where even minimal sources of vibrations lead to imprecision of onboard instruments. To address this, magnetic bearings offer contactless support, and thus prevent several sources of microvibrations that exist in classical ball bearings, for instance the mechanical imperfections in rolling elements. The inherently low stiffness of magnetic bearings also significantly reduces the transmitted forces in reaction wheels. Another advantage of contactless support is its potential longer lifetime because of the absence …

Validation Of Steering Law For A 4-Variable-Speed Single-Gimbal Control Moment Gyroscope Pyramid Cluster Via Spherical Air-Bearing Testbed, Kai Kuo Liao, Chih Ta Wu, Jen Hao Cheng, Po Hsun Yen, Shang Jung Lee

Small Satellite Conference

• VSCMG: wheel speed is commanded with gimbal rate — the extra DOF lets the cluster slide past singularities.
• HIL: a Helmholtz cage replays the on-orbit field and a solar simulator sets the Sun line.
• This work: HIL validation of a weighted-pseudoinverse steering law, 4-unit pyramid.

Evaluating Performance Of Hardware-Accelerated Vessel Detection Algorithms, Michael Tietz, John Warner, Quinton Davidson, Douglas Carssow

Small Satellite Conference

Earth observing satellites contribute to the monitoring of maritime activity by enabling large-scale coverage of open water. For example, spacecraft data can be used to monitor and combat Illegal, Unreported, and Unregulated (IUU) fishing that occurs in coastal and international waters across the globe. However, information latencies limit the utility of space-based sensors for operational users who need real-time situational awareness. These limitations are especially pronounced for small spacecraft with limited power generation and downlink capabilities. In recent years, the devices and tools that enable edge computing and near real-time downlink from small spacecraft have improved substantially. Equipped with these …

Dynaband: Context-Aware Dynamic Band Selection For Onboard Hyperspectral Processing In Small Satellites, Rishigesh Jayananth, Brasen Sheeh

Small Satellite Conference

Hyperspectral small satellites now collect far more data than they can return to the ground. A single acquisition spans tens to hundreds of spectral bands, yet the downlink window on one pass carries only a fraction of it, so operators are forced to drop scenes, bin bands coarsely, or store data that never reaches the ground. Much of this waste is avoidable. When the task is known before the spacecraft images, whether to map water, monitor vegetation, or pick out a mineral signature, only a handful of bands actually carry the answer; the rest is paid for in downlink and …

Metadata-Conditioned Dark-Frame Modelling And Hsdr-Scanfusion Denoising: A Physics-Informed Independent Tool For Low-Cost Hyperspectral Small-Satellite Calibration, Nooh Adnan, Kyaw Thiha, Raffael Gil Dela Cruz, Li Cheng Zheng, Faijul Amin, Areeba Khan, Sameha Tasnim, Sung Jegal, Yunhan Bao, Iliya Shofman

Small Satellite Conference

Hyperspectral imaging in the shortwave-infrared spectrum is valuable for orbital Earth observation, but its use on low-cost, resource-constrained small satellites is limited by thermally dependent dark current, fixed-pattern noise, and intermittent access to matched calibration frames. Traditional mitigation through active cooling, shutters, or frequent dark-frame acquisition can be difficult to accommodate within small-satellite mass, power, volume, and operations budgets. This paper presents a physics-informed independent calibration tool that reconstructs condition-matched dark response from acquisition metadata rather than relying on hardware-heavy calibration at every operating point. The framework combines a stochastic dark-noise simulator, a metadata-conditioned neural dark operator that predicts spectral-spatial …

Event-Driven Spacecraft Operations Demonstrated On Mms, Miles Bengtson, Alexander Barrie, Joseph Patton, Liam Greenlee, Paul Wood, Marcus Piquette, Russell Bjella, Matthew Chang, Joshua Paul

Small Satellite Conference

Operations engineers face the challenging task of capturing high-value science data while maintaining spacecraft health and functionality and responding to a dynamic space environment using limited information. This task is becoming increasingly complex as missions involve increasingly large numbers of spacecraft, target more elusive science signatures, and operate under growing budget and staffing constraints. Conventional pre-programmed time-sequence commands become increasingly burdensome for multi-spacecraft missions and are fundamentally incapable of reacting to rare, transient science events in real time.

To address this challenge, we have developed MEDOS: the Module for Event-Driven Operations of Spacecraft. Unlike machine learning and neural-network approaches, MEDOS …

Let’S Give The Fsck Up On Secded, Heather M. Quinn, Andrew Pineda, Gary Swift

Small Satellite Conference

Many space systems use error correcting codes (ECC) for handling radiation-induced upsets in memories. The most used ECCs are Hamming and Hsaio, which are single-error correction/double-error detection (SECDED) codes. The widespread use of these codes can lead to a dangerous overestimation of system reliability. Instead these codes are one of the best documented methods for microprocessor-based system crashes, due to uncorrectable faults. Less well documented is how these codes can lead to silent data corruption caused by miscorrections, where multiple errors are detected as a single error and corrected erroneously.

ECCs have always been sensitive to time-dependent errors, where SEUs …

Design And Qualification Of A Compact, Deployable Dual-Monopole Antenna System For Remote Sensing Microsatellites, Alexander J. Murphy, Bryan Johnston-Lemke, Robert E. Zee

Small Satellite Conference

Spacecraft conducting signals intelligence (SIGINT) missions require highly capable radio-frequency (RF) payloads. While the larger 80 kg-class platforms offer increased payload capacities, strict internal volume limitations persist. These constraints sometimes require stowing instruments, such as the dual-monopole Very High Frequency (VHF) antenna presented in this work, directly beneath the solar wings. This requirement has imposed a strict height constraint on the VHF antenna, mandating a highly compact and reliable deployment mechanism that avoids snagging or jamming during deployment. 

This paper presents the mechanism design and qualification test plan of a novel, deployable dual-monopole VHF antenna system designed to increase satellite …

Nanouhfcomms Mission Overview, Nazia Mozaffar, Salwan Damman, Ryan Hiser, Lizbeth Durbin, Jose Ruvalcaba, Alejandro Castro, David Sadowski, Dmitriy Obukhov, Brendan Hill

Small Satellite Conference

The NanoUHFComms experiment seeks to demonstrate the ability to detect and correct Doppler offsets caused by the relative high velocity between Low Earth Orbit (LEO) spacecraft and terrestrial nodes. The payload includes a Rincon Research Corporation AstroSDR with external Low Noise Amplifier (LNA) for the receive band and an external power amplifier for the transmit band. The uplink and downlink bands are combined with a diplexer before connecting to a common antenna mounted on the spacecraft. The demonstrations planned for the orbit testing include a relay mode which will detect and correct the Doppler offset of an uplink signal, translate …

A Smallsat In Vleo: The Orion Kraken Approach, Chad Fish, Crystal Frazier, Sun-Hee Goldsberry, Katie Nyland, Will Armijo, Raj Patel, Elijah Vance, Adam Reynolds, Nathan Tipton, Kevin Quintana, Sam Clowes, Rachel Stutz, Keith Underwood, Jared Stromberg, Justin Berger, Erich Hoover, Andrew Irvine, Ali Wise, Christian Frazier, Derek Taylor, Kong Yang, Tracy Cueto, Wes Leong, Greg Ushomirsky, Charles Swenson, Paul Bernhart, Ron Reedy, Tim Minton, Mitchell Weins, Kent Frankovich

Small Satellite Conference

The Orion Space Solutions' Kraken Mission, sponsored by DARPA and implemented by a science and engineering team led by Orion Space Solutions, will make in-situ and remote sensing space weather observations from Very Low Earth Orbit (VLEO). The mission instrument suite will include Langmuir Probes, RF Impedance Probes, HF Sounders, Atomic Oxygen Sensors, Science Magnetometers, Floating Potential Probes, and Science Accelerometers. Long-term (approximately 4-6 month lifetime), repeated measurements of plasma density and other plasma and neutral parameters in this region are very rare, and the Kraken data is expected to contribute considerably to space weather and science modeling of VLEO. …

The Cospar-1 Spacecraft: Advancing Space Science And Capacity Building Through International Collaboration, Amal Chandran, Hex20 Ltd., Carlos Gabriel, Loren C. Chang

Small Satellite Conference

The Committee on Space Research (COSPAR) is the world's leading organization for advancing space science. The COSPAR Panel for a Constellation of Small Satellites (PCSS) was assembled in 2020 to examine how emerging CubeSat and small satellite technology could help solve outstanding questions in Space Weather, Earth Climate change, and Radiation Belt studies through constellations of miniature spacecraft. The COSPAR-1 spacecraft is a 3U CubeSat carrying a Solar Spectral Sensor from the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado Boulder to observe solar output across the UV-to-IR spectrum, an Earth Radiation Sensor from LATMOS in …

Noaa Nesdis Commercial Data Program Using Small Satellites For Space-Based Environmental Monitoring Data, Marc Gasbarro, Natalie Laudier, Harshesh Patel, Gerald Peltzer, Chunhui Pan

Small Satellite Conference

The National Oceanic and Atmospheric Administration (NOAA) National Environmental Satellite, Data and Information Service (NESDIS) Commercial Data Program (CDP) successfully engages with the private sector to acquire commercial space-based environmental observation data to diversify, streamline, and improve NOAA's observations and to meet NOAA’s mission objectives. The NESDIS CDP manages two lines of effort, the Commercial Data Pilot projects to demonstrate the quality and impact of commercial data on NOAA applications and the Commercial Data Purchases to support operational weather and space weather applications. NESDIS CDP leverages commercial companies’ use of innovative Small Satellite (SmallSat) collection platforms. NESDIS CDP procures data …

A Survey Study On Physiological Hearing Assessment Practice In The Usa, Malina Mangrum, Hasan Saleh, Sangamanatha Ankmnal Ankmnal Veeranna, Kimberly Ward, Charles G. Marx

Journal of Early Hearing Detection and Intervention

Background: In the United States, limited information exists regarding the physiological measures and testing parameters used in infant hearing assessments. To address this gap, we conducted a nationwide survey to identify the types of physiological tests and procedures currently employed by audiologists.

Method: A structured survey was distributed to audiologists across the country to gather information about the auditory tests and recording parameters used in infant hearing evaluations.

Results: Most respondents reported using Auditory Brainstem Responses (ABRs) to estimate infant hearing thresholds, primarily relying on traditional stimuli rather than chirp stimuli. The Auditory Steady-State Response (ASSR) was not widely used …

Odin: Optomechanical Distributed Instrument For Inertial Sensing And Navigation, Mohanad Warrayat, Jackson Dahn, Ramses Miranda, Andrea Nelson, Jeremiah Stoddart, Miguel Dovale, Jose Sanjuan, Felipe Guzman, Daniel Selva

Small Satellite Conference

ODIN (Optomechanical Distributed Instrument for Inertial sensing and Navigation) is a gyroscope-free inertial measurement unit based on a cube of six monolithic fused silica wafers which complete a twelve-axis sensing capability, i.e., three linear, three angular, and six centripetal acceleration measurements. ODIN will fly as a secondary payload on the GRATTIS (Gravitational Reference Advanced Technology Test in Space) mission, slated for launch in February of 2027, led by the University of Florida and funded by the NASA InVEST program. By the end of the GRATTIS mission, it is expected that ODIN will reach an exit TRL-7.

The primary objective of …

Acs3 Results And Lesson Learned, Philip Shih, Olive Stohlman, Ivan Bertaska, Andres Dono Perez

Small Satellite Conference

ACS3 (Advanced Composite Solar Sail System) was a technology demonstration mission for the National Aeronautics and Space Administration¹, to demonstrate the deployment of a solar sail of size 80m² from a new NASA-developed compact deployable composite boom² packaged in a 12U CubeSat. The extended objective of the mission was to perform attitude control and orbit maneuvering. ACS3 was successfully launched on 24 April 2024 local time via Rocket Lab Electron launch vehicle from Rocket Lab Launch Complex 1B in Mahia, New Zealand. Following four months of commissioning operations, the solar sail was deployed on 28 August …

The Pandora Smallsat: Overview Of The First Six Months In Orbit, Jessie Dotson, Elisa Quintana, Knicole Colón, Thomas Barclay, Christina Hedges, Ben Hord, Trevor Foote, Jordan Karburn, Pete Supsinkas, Lance Simms, Joe Renaud, Julie Moquin

Small Satellite Conference

The Pandora SmallSat was selected as an inaugural NASA Astrophysics Pioneers mission. The Astrophysics Pioneers program is tasked with performing compelling astrophysics science at lower cost while simultaneously providing space mission experience to early career researchers and engineers. The science goal of Pandora is to study transiting exoplanets and their host stars by collecting long duration, simultaneous visible photometry and near-infrared spectroscopy. This unique dataset will enable Pandora to disentangle the contributions from stellar activity which contaminate the exoplanet spectrum so we can search for water in exoplanet atmospheres.

The Pandora SmallSat successfully launched from Vandenberg Space Force Base on …

Esa Scout Hydrognss Early Mission Results, Martin Unwin, Alex Da Silva Curiel, Ben Stern, Jean-Pascal Lejault, Nazzareno Pierdicca

Small Satellite Conference

The ESA Scout HydroGNSS mission demonstrates a new generation of GNSS reflectometry (GNSS R) capabilities for hydrological climate monitoring from small satellites. HydroGNSS measures soil moisture, freeze–thaw state, inundation, wetlands and above ground biomass by exploiting both traditional incoherent Delay Doppler Maps (DDMs) and several innovative signal types not previously available from spaceborne GNSS R missions. Early in orbit results confirm successful acquisition of signals from Galileo, dual polarisation measurements, coherent complex channel data and reflections at the second GNSS frequency (L5/E5a). These enhanced measurements exhibit stronger than predicted performance and are expected to significantly improve retrievals of climate relevant …

Gray Jay Pathfinder: One Year Of Maritime And Airborne Vessel Monitoring With A Formation-Flying Constellation Of Microsatellites, Erica Peterson, Nicolaas Handojo, Nima Assadian, Jacob Von Chorus, Jeremy Hawke, Andrew Barlow, Sanjeev Narayanaswamy, Abigail Macgillivray, Alex Kiar, Nathan Cole, Robert E. Zee

Small Satellite Conference

Gray Jay Pathfinder (GJP) is an experimental microsatellite constellation that has been designed, built, and operated by the Space Flight Laboratory (SFL), for Defence Research and Development Canada (DRDC). GJP launched in January 2025, and consists of three microsatellites, developed using SFL’s 30kg DEFIANT platform, flying in formation in a sun-synchronous orbit at a 510km altitude. All three spacecraft carry radio frequency (RF) payloads capable of receiving raw spectrum in the VHF, UHF, L, S, and X radar bands. The RF payloads include a combination of in-house designed and COTS antennas, in-house designed antenna front ends, a payload computer with …

Disksat: On-Orbit Performance And Lessons Learned From The Inaugural Flight Of Two-Dimensional Satellites, Darren Rowen, Catherine Venturini, Garrett Kinum, Brian Hardy, Joseph Gangestad, Lisa Toda, Chris Day, Thomas Pridy, Eddson Alcid, Ziba Shahriary

Small Satellite Conference

DiskSat is a novel spacecraft design that uses a disk-shaped form factor, 1 meter in diameter but only 2.5 cm in depth, to provide unprecedented power-to-mass ratio in a nanosatellite and the potential to operate long-term in very low Earth orbit (VLEO). The inaugural flight of four DiskSats launched on 18 December 2025 from NASA’s Wallops Flight Facility on an Electron rocket, which delivered the satellites to a 550-km altitude orbit at an inclination of 45 deg. Developing DiskSat’s two-dimensional form factor presented a myriad of challenges for power generation, thermal management, attitude control, and deployment that could only be …

Integrated Optical/Body-Dynamics Simulations For Pointing, Acquisition And Tracking For The Pulse-A Mission, Juan Ignacio Prieto Asbun, Elizabeth Rosario, Jiayang Xu, Catherine Todd, Robert Pitu, Tian Zhong

Small Satellite Conference

PULSE-A is the University of Chicago’s student-led 3U CubeSat mission to demonstrate a space-to-ground optical downlink at a data rate of 1 to 10 Mbps using circular polarization shift keying (CPolSK).

To avoid costly and ineffective hardware-in-the-loop simulations, we instead present software-in-the-loop simulations designed to qualify our optical and PAT systems. This allows for simulations of the coupled optical systems that include closed-loop corrections and body pointing errors.

Sailing To The Stars Iss Experiment: Results And Conclusions From Light Sail Deployments In Microgravity, Verena Padres, Parishee Bajaj, Venkata Chalamalasetty, Claire Kim, Joshua Umansky-Castro, Dionna Parina, Gabriella Elcsics-Gonzalez, Cameron Goddard, Ethan Francolla, Mason Peck, Andrew Filo, Alex Burke, Olivia Gámez Holzhaus, Heath Mills, Christopher Kelly

Small Satellite Conference

Sailing to the Stars is a mission to test the deployment of free-flying light sails on the International Space Station (ISS). The objective is to understand how different deployer designs affect the stability of both the CubeSat Deployer and the light sail during and after the deployment event. Data from the IMU onboard the deployer and video footage from wall-mounted cameras are used to analyze these dynamics. The findings shall inform the design of future missions that employ this free-flying ChipSat-sail architecture.

The hardware launched with Crew-11 on August 1^st, 2025. Nicole Ayers conducted the experiment on August …

A Proposed Development Process For A Hardware-In-The-Loop Testing System For Cubesat Components, Vahini N. Patel, Victoria Coverstone

Small Satellite Conference

Hardware-in-the-loop testing systems, commonly known as FlatSats, are testbed systems in which spacecraft subsystems, such as the onboard computer (OBC), power system, attitude determination and control system (ADCS), and communications, are laid flat and interconnected as they would be in an actual spacecraft. This arrangement gives easy access to each subsystem, enabling hardware and software testing and troubleshooting without risking fully assembled flight hardware.

FlatSats are widely used throughout the aerospace industry, from government agencies like ESA and NASA to private companies and university research labs, due to their versatility in enabling parallel development. This accelerates timelines and reduces …

Characterizing Rolling-Shutter Distortions In A 1u Cubesat Camera Using Led Strobe Imaging, Sharon Chan, Arseniy Dolgov, Andrea Schildhorn, Jenny Zhu, David Michelson

Small Satellite Conference

The ArduCAM OV5642 rolling shutter sensor was selected for ALEASAT because its simpler design results in reduced cost, power consumption, and heat generation. Although rolling shutter readout can introduce image skew due to the relative motion between the CubeSat and Earth, these sensors provide sufficient resolution and sensitivity within mission constraints. The feasibility of de-skewing, therefore, depends on the stability and predictability of the rolling shutter readout. Camera testing is not currently included in ISO 19683 (Space Systems – Design qualification and acceptance tests of small spacecraft and units). This work could be a step towards addressing that omission.

The …

Power Simulation Framework For Korucusat-2 Using Freeflyer, Sahil Singh, Annabel Rong, Mukund Karthikeyan

Small Satellite Conference

A FreeFlyer-based power simulation was developed for KORUCUSAT-2, a low Earth orbit CubeSat designed to monitor silicon-anode battery behavior in space. The spacecraft model uses body-mounted solar panels with five modules on each of the +X, -X, +Y, and -Y faces. The simulation integrates orbital propagation, Earth shadowing, Sun-incidence angle, ground-station visibility, mode-dependent subsystem loads, and battery-state propagation to estimate electrical margin. Battery watt-hours and normalized state of charge are updated at each 30 s step so that critical, low-power, operations, and transmission modes can be evaluated against stored-energy limits. The framework provides a traceable prelaunch test bench for power-system …

Iterative Determination Of Pressures In The Refueling Process Of The Pw-Sat3 Satellite, Jakub Paziewski, Michał Niewiadomski, Paweł Senda, Jakub Dresler, Mikołaj Kmin, Kacper Kordek

Small Satellite Conference

PW-Sat3 is a 3U CubeSat being developed by the Students’ Space Association at the Warsaw University of Technology. It is a third satellite in the PW-Sat series, following PW-Sat with a deorbitation tail and PW-Sat2 with a deorbitation sail. PW Sat3 will be equipped with a warm-gas propulsion system and an authorial AOCS written by the students.

The final goal is to perform orbital decay by lowering the perigee. Secondary goals include taking pictures of the planet and evaluating innovative Earth horizon sensors using the satellite as a platform for amateur radio experiments.

Tracking Assembly For The Pulse-A Optical Ground Station, Rodrigo Spinola E Castro, Ashley Ashiku, Elizabeth Rosario, Juan Ignacio Prieto Asbun, Robert Pitu, Tian Zhong

Small Satellite Conference

PULSE-A is the University of Chicago’s student-led 3U CubeSat mission to demonstrate a space-to-ground optical downlink at a data rate of 1 to 10 Mbps using circular polarization shift keying (CPolSK).

Advanced Ai Deployment On Smallsats: A Mixed Precision Approach To Onboard Perception And Fpga-Gated Inference, Margaret Michelsen, Jackson Gardner, Shawn Jones, Jackson Kulik, Mario Harper

Small Satellite Conference

MOTIVATION:

SmallSats are asked to make time-sensitive calls (vessel detection, cloud filtering, debris tracking) but CubeSat-class compute is starved for power, memory, and radiation-tolerant silicon.

Most missions still downlink raw imagery for ground processing, costing hours-to-days of latency and scarce bandwidth. Running inference onboard means solving two separate problems:

• When to run inference: compute and power budgets can’t tolerate a neural network firing on every frame.
• Whether it fits when it does run: the model has to live inside a memory and compute envelope measured in megabytes, not gigabytes.

Design And Performance Evaluation Of A Water-Based Micro-Propulsion System For Cubesats, Wasan Al Salhi

Small Satellite Conference

In this paper, a water-based micro-propulsion system is proposed as a controlled and safe thrust system for CubeSat missions. The system is intended to prevent failure in the case of partial power failure or loss of control by providing a low thrust level that can be used for trajectory correction and safe recovery. A system-level analytical model and numerical simulations are developed to investigate the performance of the proposed water-based micro-propulsion system under emergency operating conditions. The simulations showed that the low thrust propulsion system can be used to greatly improve the safety of the system while maintaining the advantages …

Development Of Low-Cost And Mobile University Ground Stations, Michael Cargill, Matthew Watson, Patrick Bailey, Jacob Boutin, Wout De Backer

Small Satellite Conference

Recent years have seen a deluge of university-class small satellite missions, driving an increase in demand for ground stations. SatNOGS is an open-source network of ground stations allowing users to schedule observations on each others’ hardware. Most stations are fixed in-place. Mobile stations lack endurance or are high cost. There is a gap for a low-cost option for groups needing mobility.

Experimental And Analytical Investigation Of Low-Power Resistojet Performance For Small Satellites, Ryan Mcpherson, Daniel Kichma, Nathan Paes, Benoit Larouche, Robert E. Zee

Small Satellite Conference

• Small satellite missions increasingly require propulsion systems that can deliver meaningful maneuverability within tight limits on mass, volume, and power.
• Water resistojet thrusters are attractive for this class of spacecraft because they are simple, nontoxic, and compatible with typical small satellite power budgets, but achieving efficient performance at low power remains challenging.
• This work addresses that gap through coupled thermo-fluid modeling, parametric trade studies, and experimental characterization of low-power water resistojet prototypes using a low-cost vacuum testbed.