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Development of Testing and Verification Procedures for MEMESat-1\u27s Subsystems
Get PDFMEMESat-1 is a 2U repeater crafted by the UGA Small Satellite Research Lab. It\u27s geared towards inspiring the next generation of students to work in aerospace. MEMESat-1 is entering the stage of testing our satellite to ensure it will be prepared for its mission. These tests will be the respnsibility of MEMESat-1\u27s Mission Operations team. MOPs will employ a series of ground tests to validate the satellite\u27s subsystems, including its flight software via the DitL testing, communication via the Simulated Communication testing, power supply via the Charge Cycle testing, ADCS via the ADCS Verification testing, and command system via the Command and Execution testing
PULSE PocketQube: Cosmic Radiation Analysis of the LEO Environment During a Solar Event
Get PDFSpace weather events can cause harmful effects to spacecraft and communications in Low Earth Orbit, where the cosmic radiation environment during such an event is understudied. Real-time data that characterizes this environment in detail with respect to spatial and temporal characteristics could help us better understand particle composition and interactions in LEO during a solar event, as well as enhance existing predictive models for space mission planning. Current approaches have limited information on particle composition with respect to dose and energy rates, and are hindered by high costs in deploying large space weather monitoring constellations. This proposed satellite mission, PULSE, aims to overcome these challenges by demonstrating a 3P PocketQube equipped with a novel Timepix2 semiconductor detector that can conduct advanced radiation analysis by mapping particle flux corresponding to time of arrival and deposited energy rates for each particle, ultimately reconstructing the radiation environment during a solar event. PULSE is conceptually designed based on a unique operational concept in managing power and data link capacity within the PocketQube configuration to trigger an action that acts as a preliminary solar event alarm. Simulations of various subsystems are performed. The PULSE mission is planned for 7 months during the solar maximum event of 2025. To map the impact of particles on a LEO satellite. Eclipse time is estimated to be 35.42% of mission lifetime and additionally 6 partner ground stations are selected with average contact time of 330 seconds for telecommunications
FemtoSats in Zero-G ISS Experiment
Get PDFThe FemtoSats in Zero-G investigation was an ISS experiment in which a handheld deployer ejected four purely mechanical FemtoSats within the ISS. Femto Satellites are centimeter-scale spacecraft that weigh less than 100 grams. The FemtoSats and deployer were made on the Additive Manufacturing Facility (AMF) onboard the ISS on August 28th, 2017, and March 29th, 2017, respectively
The Bosuns Locker: A Universal Payload Enclosure for In Space Manufacturing & Robotic Assembly in Space
Get PDFArkisys is dedicated to enabling payloads to reach LEO that don\u27t have a free-flying requirement. Our unique Port Module is an autonomous long-duration modular orbital platform designed to host payloads and servicing technologies in any orbit with a simple process, with the first roll-out in LEO. It will enable our customers to qualify and test their hardware in orbit in less than 90 days
Software Configuration Management for Proliferated LEO Satellites
Get PDFOur novel Software Configuration Management (SWCM) approach addresses common pain points using off-the-shelf tooling and industry best practices to enable greater speed and efficiency on high-volume small satellite production lines
A Low-Cost, Hardware-In-The-Loop Simulator Facilitating CubeSat Star Tracker Development
Get PDFCubeSats are increasingly used to support complex missions requiring accurate attitude knowledge and pointing control. To meet these requirements, miniature star trackers are being manifested with CubeSat attitude control systems. Accurate performance verification of these trackers can be facilitated using a low-cost, hardware-in-the-loop simulator. The simulator covered in this paper incorporates a high-resolution monitor and a collimating lens to project a simulated star field for the star tracker under test. Based on a systematic accuracy analysis, this simulator is shown to be precise enough to allow for successful star identification and attitude determination in a closed loop test. An empirical method is also used to calibrate the brightness of projected stars by comparing star camera sensor outputs with night sky data. The simulator\u27s ability to recreate operating conditions is finally validated by comparing detection and identification results against night sky data from a new star tracker now under development in the Laboratory for Advanced Space Systems at Illinois (LASSI)
Predicting the Properties of Resident Space Objects in LEO Using Graph Neural Networks
Get PDFIn recent years, the number of resident space objects (RSOs) in low Earth orbit (LEO) has significantly increased. As a result, decision-making tasks and the overall understanding within the space domain have become more challenging. To make critical decisions such as collision avoidance manoeuvres, satellite owners and operators must be aware of their assets’ surroundings. Therefore, spacecraft operators must understand the characteristics of these RSOs and their spatial relationships. To address this issue, we propose a novel approach using graph neural networks (GNNs) to predict RSOs’ properties in LEO. This approach captures the complex interdependencies between RSOs by representing each object as a node in the graph and defining the edges based on the objects’ spatial proximity, quantified by the orbit altitude differences. We demonstrate the potential of using GNNs to infer missing RSOs’ properties by training the network using masked nodes. Additionally, we discuss how a given neighbourhood can assist at an operator-specific level, improving space situational awareness, and enabling a more informed decision-making process
Advancing Hybrid Rocketry: HyImpulse Technologies\u27 Journey From SR75\u27s Maiden Launch to the Development of SL1
No full textHyImpulse leads innovation with its hybrid propulsion, demonstrated by the successful may launch of the SR75 suborbital rocket, which qualifies systems for the SL1 orbital launcher. The in-house developed HyPLOX75 hybrid engine powers SL1\u27s modular stages for a 2026 launch. This research overcomes technical challenges, providing safer, cost-effective, and responsive rocket solution
A Low Size, Weight and Power Cryogenically Cooled Mid-Wave Infrared Image Sensor for Small-Satellite Payloads
Get PDFThere is an established need for a readily available, low-cost, and high performance cryogenically cooled IR imaging sensors to support earth observing missions. The New Space economy is fast developing and requires rapid development of low-cost commercial space payloads. However, there is a dearth of space qualified commercially available high-performance sensors. This presentation shows a novel family of cryo cooled IR sensors used in high-end earth observing payload