The first one Hundred University-Class spacecraft 1981 -2008

Swariwout, M.

doi:10.1109/maes.2009.4811089

Cited by 7 publications

(7 citation statements)

References 21 publications

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“…The underlying objective of this thesis is to offer proof-of-concept of a low-cost scientific payload design that is compatible with cubesat development kits, such as the kits offered by IOS and Pumpkin, Inc., for public use in the advancement of space-based systems development for the next generation of scientists and engineers [36] [44]. The proposed payload design concept incorporates COTS components to keep costs affordable and to prove the capabilities and characterize limitations of using COTS devices.…”

Section: Research Objectivementioning

confidence: 99%

“…Thus, a total of 3U standard cubesat units can fit inside a P-POD. With respect to the launch provider, the P-POD essentially becomes a 'black-box' where the contents are not of importance to them as long as it contains the proper mass and maintains structural integrity throughout the launch [36]. The value this decouple provides to cubesat developers is huge and is the fundamental reason there seems to be an increasing number of 'piggy-back' launch opportunities being offered by government and commercial providers.…”

Section: Cubesats For Earth Sciencementioning

confidence: 99%

“…A C-class (communications-class) mission provides communications services to some part of the world (often in the Amateur radio service). Missions listed as E-class (education-class) lack any of the other payloads and serve mainly to train students/young engineers and improve the satellitebuilding capabilities of that particular program; typical E-class payloads include COTS imagers (low-resolution Earth imagery), on-board telemetry, and beacon communications" [36]. E-class cubesats are sometimes informally referred as "BeepSats", when they serve no on-orbit function other than continually sending back telemetry in regular intervals.…”

Section: Cubesats For Earth Sciencementioning

confidence: 99%

“…The color distribution represents the number of cubesats deployed per launch vehicle. It can be seen that a drastic increase was seen from 2012 to 2013 and the trend has continued to rise on an even greater scale (Appendix B) [35] [36]. It has been predicted that the average number of cubesat deployments per launch will also rise.…”

Section: Cubesats For Earth Sciencementioning

confidence: 99%

“…"The motivation for moving to 3U-sized spacecraft is a need for more volume and aperture; practically speaking, a 3U spacecraft has more than triple the power, communication, and pointing capacity of a 1U spacecraft. It is instructive to note that the very first 3U spacecraft, QuakeSat, was also the first successful S-class Cubesat, and that 28 of 30 3U-class spacecraft have had real missions (compared with 33 of 76 1U missions)" [36]. Five to six years ago, it could be assumed that a student-built Cubesat would be an E-class 1U, whereas an industry-built Cubesat would be a T-class 3U.…”

Section: Cubesats For Earth Sciencementioning

confidence: 99%

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A Low-cost Normalized Difference Vegetation Index (NDVI) Payload for Cubesats and Unmanned Aerial Vehicles (UAVs)

Hard¹

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A Low-Cost Normalized Difference Vegetation Index (NDVI) Payload for Cubesats and Unmanned Aerial Vehicles (UAVs) Steven Hard The focus of this research has been the design and fabrication of a Normalized Difference Vegetation Index (NDVI) payload configuration. This unique payload employs low-cost commercial off-the-shelf (COTS) hardware and equipment to assess photosynthetic activity and vegetation health through remote sensing on Cubesat or Unmanned Aerial Vehicle (UAV) platforms. The proposed NDVI imaging payload is comprised of three main subsystems: an electrical system, a software system, and a hardware system. The electrical system includes a custom designed printed circuit board (PCB), a single cell 3.7 V lithiumpolymer battery, voltage regulator circuitry components, and wiring harnesses and connectors. The software system employs a master and slave system that communicates through general purpose input/output (GPIO) pin responses. Raspberry Pi Zero computer boards serve as the central processing units (CPUs) of the hardware subsystem, which also consists of the Pi-Cam standard red/green/blue (RGB) and Pi No-IR near-infrared (NIR) camera modules. A PCB was designed to be compatible with the Cubesat standard and lightweight component selections make it a desirable option for UAV flights. Open-source GIMP image processing software was used to analyze results from ground-based testing and flight testing on a UAV and general aviation (GA) aircraft at various altitudes to validate proof of concept. Raw NDVI and NDVI color map images were created from GIMP postprocessing. Analysis of the results suggests that the angle of incidence of the sun with respect to the view angle of the imaging payload is a significant factor in the resulting NDVI values. Terrain also appeared to have an effect on the results where shadows were cast from the sun at low angles of incidence. Therefore, in the northern hemisphere it is recommended that image collection is performed roughly within the hours of 10 AM and 2 PM between the vernal and autumnal equinoxes to ensure a solar altitude of at least 35⁰. For best results, it has been verified that image data should be collected at the local time of maximum solar altitude for a particular date and location of interest (typically around noon). The information gather by this research can be used by scientists and technologist to potentially provide a means of enhancing their research and further developing technologies of UAV applications and space-based systems.

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Section: Research Objectivementioning

confidence: 99%

Section: Cubesats For Earth Sciencementioning

confidence: 99%

Section: Cubesats For Earth Sciencementioning

confidence: 99%

Section: Cubesats For Earth Sciencementioning

confidence: 99%

Section: Cubesats For Earth Sciencementioning

confidence: 99%

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A Low-cost Normalized Difference Vegetation Index (NDVI) Payload for Cubesats and Unmanned Aerial Vehicles (UAVs)

Hard¹

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I‐3c

Barschke¹

2020

Nanosatellites

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A Combinatorial Approach to Tradespace Exploration of Complex Systems: A CubeSat Case Study

Qiao

Efatmaneshnik

Ryan

2017

INCOSE International Symp

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This paper presents a novel approach to tradespace exploration for large‐scale and multi‐dimensional tradespace, which reduce the cognitive workload in addressing numerous design options to a manageable level. Our approach enables exploration by classifying subsets of design solutions or designs of interest, which will in turn facilitate and accelerate the decision making process. As the design tradespace for products such as CubeSats is naturally large‐scale and multi‐dimensional, the proposed approach integrates computational data clustering algorithms with multi‐dimensional scaling visualization. In the proposed approach, k‐medoids clustering provides a grouping model where similar designs are grouped; uncovering hidden patterns and features within datasets; and the principal component analysis allow users to visualize design samples on two‐dimensional scatter plots. A case study tradespace consisting of 1200+ CubeSat design alternatives is used to demonstrate how this approach supports knowledge discovery of design options through tradespace exploration of multi‐dimensional data.

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The first one Hundred University-Class spacecraft 1981 -2008

Cited by 7 publications

References 21 publications

A Low-cost Normalized Difference Vegetation Index (NDVI) Payload for Cubesats and Unmanned Aerial Vehicles (UAVs)

A Low-cost Normalized Difference Vegetation Index (NDVI) Payload for Cubesats and Unmanned Aerial Vehicles (UAVs)

I‐3c

A Combinatorial Approach to Tradespace Exploration of Complex Systems: A CubeSat Case Study

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