Digital Commons Network^™

Reaching Full Operating Capability With The Tomorrow.Io Weather Constellation, Scott Williams, Emma Watson, Jan Wicha, Joe Munchak

Small Satellite Conference

The Tomorrow.io weather constellation leverages advances in small satellite technology and the emergence of affordable rideshare options to provide timely, global weather measurements using a constellation of precipitation radars and passive microwave sounders. The focus of this paper is on the design and deployment of Tomorrow.io’s CubeSats carrying passive microwave radiometers known as Tomorrow.io Microwave Sounders (TMS). The TMS instrument design is based on technology transitioned from the MIT Lincoln Laboratory (MIT LL) with technology insertions to improve performance. TMS will achieve full operating capability (FOC) with 12 satellites in a hybrid mix of sun synchronous and mid inclination orbits. …

Platonic Studies, Gregory Vlastos

Hannah Arendt Marginalia - All

[Princeton, N.J.] Princeton University Press [1973]

Call #: B395 .V58

Contains underlining and marginal lining

PDF Information: 20 pages – 1,766KB

Order And History V.1, Eric Voegelin

Hannah Arendt Marginalia - All

[Baton Rouge] Louisiana State University Press [1956]-c1987

Call #: CB19 .V58 1956 v.1

Contains underlining and marginal lining

PDF Information: 169 pages – 13 MB

Order And History V.3, Eric Voegelin

Hannah Arendt Marginalia - All

[Baton Rouge] Louisiana State University Press [1956]-c1987

Call #: CB19 .V58 1956 v.3

Contains underlining and marginal lining

PDF Information: 101 pages – 103.9 MB

The New Science Of Politics; An Introduction, Eric Voegelin

Hannah Arendt Marginalia - All

Chicago, University of Chicago Press, 1952

Call #: JC251 .V6

Contains marginalia, underlining, marginal lining, and endpaper notes.

PDF Information: 91 pages – 41.6mb

Tax Trends, E. S. Linett

Tax Adviser

No abstract provided.

Socratic Humanism, Lazlo Versenyi

Hannah Arendt Marginalia - All

New Haven, Yale University Press, 1963

Call #: B317 .V4

Contains marginalia, underlining, marginal lining, and endpaper notes

PDF Information: 76 pages – 42.6mb

The New Science Of Giambattista Vico, Giambattista Vico

Hannah Arendt Marginalia - All

New York: Anchor Books, 1961

Call #: B3317 .S34

Contains marginalia and endpaper notes.

PDF Information: 42 pages – 17.6mb

The Adams-Jefferson Letters: The Complete Correspondence Between Thomas Jefferson And Abigail And John Adams V.2, Thomas Jefferson, Abigail Adams, John Adams

Hannah Arendt Marginalia - All

Chapel Hill : Published for the Institute of Early American History and Culture at Williamsburg, Va., by the University of North Carolina Press, 1959.

Call#: E322 .A516

Contains light underlining and marginal lining in v.2

PDF Information: 20 pages – 1.4 MB

Biopolitics, Thomas Landon Thorson

Hannah Arendt Marginalia - All

New York, Holt, Rinehart and Winston [1970]

Call #: JA71 .T53

contains marginal lining, marginalia, underlining, and endnotes

PDF Information: 47 pages – 23 MB

Democracy In America Vol. 1, Alexis De Tocqueville

Hannah Arendt Marginalia - All

New York, A.A. Knopf, 1945

Call #: JK216 .T7 1945

Contains marginalia, underlining, marginal lining, endpaper notes and contained ephemera : matchbook cover found between pp. 418-419. See Arendt ephemera file; folder 076.

PDF Information: 80 pages – 46.3mb

Democracy In America Vol. 2, Alexis De Tocqueville

Hannah Arendt Marginalia - All

New York, A.A. Knopf, 1945

Call #: JK216 .T7 1945

Contains marginalia, underlining and endpaper notes.

PDF Information: 95 pages – 56.7mb

Philosophy And Myth In Karl Marx, Robert C. Tucker

Hannah Arendt Marginalia - All

Cambridge, University Press, 1961

Call #: B3305.M74 T8 1961

Contains marginalia, underlining, marginal lining and notes on pages 264-265

PDF Information: 89 pages – 49.6mb

The Tax Adviser, Volume 9, Number 8, August 1978, American Institute Of Certified Public Accountants

Tax Adviser

No abstract provided.

Effect Of Informal Marital Separations On Personal Income Taxation, Carol S. Bruch

Tax Adviser

No abstract provided.

Selections, Benedictus De Spinoza

Hannah Arendt Marginalia - All

New York, Chicago, C. Scribner’s sons, c 1930

Call #: B3958 .W5

Contains underlining, marginal lining and endpaper notes.

PDF Information: 57 pages – 35 MB

After Babel, George Steiner

Hannah Arendt Marginalia - All

New York : Oxford University Press, 1975

Call #: P306 .S66 1975

Contains underlining, marginal lining and endpaper notes.

PDF Information: 67 pages – 25 MB

Natural Right And History, Leo Strauss

Hannah Arendt Marginalia - All

Chicago, University of Chicago Press, 1953

Call #: JC571 .S77

Contains marginalia, underlining and marginal lining

PDF Information: 107 pages – 20.7mb

On Tyranny, Leo Strauss

Hannah Arendt Marginalia - All

New York, Free Press of Glencoe, 1963

Call #: PA4494.H6 S8 1963

Contains marginalia, underlining and marginal lining.

PDF Information: 44 pages – 19.6mb

The Chief Works Of Benedict De Spinoza, V.1, Benedictus De Spinoza

Hannah Arendt Marginalia - All

New York : Dover, 1955, c1951

Call #: B3958 .S758 v.1

contains marginal lining and underlining

PDF Information: 94 pages – 39 MB

Conceptual Design Of An Integrated Small Satellite Environmental Testing Platform: Addressing Subsystem Integration Challenges, Benjamin Ochs, Michael Harrigan, Victoria Coverstone

Small Satellite Conference

Environmental testing for small satellites often relies on separate systems to simulate space conditions, resulting in inefficiencies, increased operating costs, and challenges in accurately modeling the complex environment. This paper presents the conceptual design of an integrated testing platform that combines thermal, vacuum, solar, magnetic, navigation, and attitude control simulations into a single piece of hardware to provide reliable mission assurance. The design emphasizes the modifications required to overcome unique interactions between subsystems, enabling simultaneous, realistic environmental qualification of small satellites while reducing cost and complexity.

The fully integrated environmental testing system incorporates a thermal vacuum chamber (TVAC) with an …

Finch Eye: The Optical And Optomechanical Design Of A Grism-Based Swir Hyperspectral Imaging Payload For A 3u Cubesat, Iliya Shofman, Mario Ghio Neto, Theaswanth Ganesh, Kenya He, Aidan Armstrong, Ksenya Narkevich

Small Satellite Conference

Crop residue is an important metric used for agricultural land-use monitoring and climate science research. Estimating crop residue coverage is essential to sustainable agricultural practices. There already exist scientific hyperspectral satellites, such as PRISMA and EnMAP, that can be used for crop residue estimation; however, they are very expensive to build and cannot be monopolized by individual farms. This leaves a gap in satellite remote sensing solutions which can be deployed operationally and at the farm scale. We seek to fill this gap by developing a low-cost satellite solution for crop residue estimation. The University of Toronto Aerospace Team is …

Extremely Low-Cost Optical Receiver For Extremely Low Resource Optical Identifiers, Ashin Alex, Joseph Ashby, Kevin Walker, Brennan Chai, Catherine Qualtrough, John E. Cater, Nicholas J. Rattenbury

Small Satellite Conference

Space object identification (SOI) is essential for space traffic management, situational awareness, and mission operations. The Extremely Low Resource Optical Identifier (ELROI), developed by Los Alamos National Laboratory, provides a persistent and interference-free identification method for small satellites through a self-powered optical beacon. ELROI transmits a unique identification code via low-power laser pulses, enabling ground stations to identify spaceborne assets without relying on traditional radio beacons. However, the efficacy of the ELROI system relies on the widespread availability of highly sensitive and cost-effective ground-based optical receivers. To address this need, we are developing a low-cost optical receiver capable of detecting …

In-Orbit Reprogramming Of Satellite’S Fpgas, John Cone

Small Satellite Conference

This document discusses the development of a system to reprogram an FPGA that is located on a satellite in orbit. The new image for the FPGA will be telemetered to the satellite and passed as command data to the subsystem containing the FPGA. The method for reprogramming is robust, verifies that the FPGA image was not corrupted during transmission, and does not rely on the current image or functionality of the FPGA.

Small satellites use Field Programmable Gate Arrays (FPGAs) to interface with the satellite computer and other instruments such as cameras and sensors. These FPGAs are traditionally programmed on …

Performance Quantification Of Diverse Controller Structures In A Non-Cooperative Multi-Agent Orbital Environment, Patrick Williams, Ryan Karow, Jacob Witthuhn, Cannon Kilcrease, Kyle King, Joshua Varon, Imraan Faruque

Small Satellite Conference

Poster presented during the 2025 SmallSat Conference.

Satellite Navigation With Earth Islands For Scope-1, S. Anand Agrawal, Brandon A. Jones

Small Satellite Conference

Spacecraft optical navigation can deliver autonomous navigation onboard when Earth-based tracking is saturated, obstructed, or impractical. Optical navigation relies on the correspondences between detected and known or mapped features in imagery to extract position and/or velocity, and data-driven methods, which directly leverage collected data to learn, can improve detection performance. This paper presents an initial data-driven Earth-based detection system using islands as landmarks for the SpaceCraft for Optical- based Position Estimation-1 (SCOPE-1) 3U CubeSat, which will be paired on board with a physics-based estimation framework. The system consists of an island detector trained on Earth observation imagery of islands, an …

Simulation-Based Evaluation Of Dual-Mode Propulsion Strategies For Small Satellite Collision Avoidance, Michael Harrigan, Charles Cundiff, Joshua L. Rovey, Victoria Coverstone

Small Satellite Conference

As Low Earth Orbit (LEO) becomes increasingly congested, small satellite missions face growing challenges in executing effective collision avoidance maneuvers under limited time and propellant constraints. Dual-mode propulsion systems, combining high-thrust chemical and high-specific impulse electric modes, offer a promising approach to balance rapid response with propellant conservation. This paper evaluates how such systems can be applied to reduce the Probability of Collision (PC) within constrained maneuver windows using sequential chemical-electric burns.

A FreeFlyer-based simulation framework models dual-mode collision avoidance maneuvers across synthetic LEO scenarios. For each case, user-defined mission parameters, such as lead time, PC threshold, and orbital altitude, …

Skyforge Core: A Triple Modular Redundant Computing Architecture For Small Satellites, Harrison Schmitt, Thomas Mcwatters, Ethan Hoyt, Josh Ellman, Sameer Sikander, Nate Westrum, Jordan Clark, Taebaeksanmaek Jung, Micah Williams, Lauren Myers, Kelden Wright, Matthew Homburg, Alex Roth, Jinran Zhang, Peter Staritz

Small Satellite Conference

As small satellite missions grow in complexity, there is increasing demand for greater onboard computational performance. Traditional radiation-hardened processors, while reliable, are expensive, slow, and suffer from long procurement timelines. In contrast, commercial off-the-shelf processors like the Raspberry Pi offer high performance at low cost but are vulnerable to radiation-induced faults such as single-event upsets. SkyForge Core is an experimental computing system that addresses this challenge by integrating three Raspberry Pi Zero W units into a triple modular redundant architecture. The system executes identical tasks on each Pi, compares outputs using majority voting, and identifies discrepancies. If a failure occurs, …

The Occultation Wave Limb Sounder, N. Jones, R. Sewell, E. Thiemann, K. Greer

Small Satellite Conference

The Occultation Wave Limb Sounder (OWLS) is a mission designed to investigate how Earth’s thermosphere responds to atmospheric gravity waves. The dissipation of gravity waves in the thermosphere has the potential to both heat and cool the atmosphere, with published simulation results reaching conflicting conclusions on whether gravity wave heating or cooling dominates. Comprised of two instruments, the Extreme Ultraviolet Occultation Photometers (EUV-OP) and Compact Spectrograph for Occultations on the Limb (CSOL), OWLS will seek to resolve this controversy. Properties of the atmosphere will be retrieved by both instruments through solar occultations. EUV-OP will retrieve thermospheric temperatures using this technique, …

Rosisat - The Radiation Orbital Shielding Investigation Satellite, Steven Insignares, Jacob Blanton, Colson Walker

Small Satellite Conference

• The Radiation Orbital Shielding Investigation Satellite (ROSISat) is an ongoing 1U CubeSat project designed to study the effectiveness of various materials as shielding against single-event upsets and effects on computer memory modules in Earth orbit.
• ROSISat is a student project managed under the Embry-Riddle Orbital Research Association (ERORA), a registered student organization at Embry-Riddle Aeronautical University in Daytona Beach, Florida.
• It is one of three projects from ERORA presented at this conference, alongside tBEARR and SATLASS.
• ROSISat aims to be the first of ERORA’s projects to be launched and operational in LEO, serving to develop CubeSat flight heritage at ERAU.