Showing papers by "Charles Swenson published in 2022"
DOI•
07 Jun 2022
TL;DR: In this paper , the authors describe recent achievements and lessons learned from a representative selection of successful CubeSat missions with a space weather focus and conclude that these missions were successful in part because their limited resources promoted not only mission focus but also appropriate risk-taking for comparatively high science return.
Abstract: When the first CubeSats were launched nearly two decades ago, few people believed that the miniature satellites would likely prove to be a useful scientific tool. Skeptics abounded. However, the last decade has seen the highly successful implementation of space missions that make creative and innovative use of fast‐advancing CubeSat and small satellite technology to carry out important science experiments and missions. Several projects now have used CubeSats to obtain first‐of‐their‐kind observations and findings that have formed the basis for high‐profile engineering and science publications, thereby establishing without doubt the scientific value and broad utility of CubeSats. In this paper, we describe recent achievements and lessons learned from a representative selection of successful CubeSat missions with a space weather focus. We conclude that these missions were successful in part because their limited resources promoted not only mission focus but also appropriate risk‐taking for comparatively high science return. Quantitative analysis of refereed publications from these CubeSat missions and several larger missions reveals that mission outcome metrics compare favorably when publication number is normalized by mission cost or if expressed as a weighted net scientific impact of all mission publications.
1 citations
TL;DR: In this article , a downlink antenna design for a CubeSat mission is presented, where the design parameters of the antenna are determined from the CubeSat link budget. And the prototype antenna is integrated on the cubeSat frame, and its performances are validated through tests in an anechoic chamber.
Abstract: – This article presents a downlink antenna design for a CubeSat mission. The design parameters of the antenna are determined from the CubeSat link budget. The prototype antenna is integrated on the CubeSat frame, and its performances are validated through tests in an anechoic chamber.
DOI•
20 Oct 2022
TL;DR: In this article , the authors examined the equatorial ionization anomaly (EIA) at night using FPMU electron density measurements along with Swarm spacecraft electron density and Total Electron Content from ground-based Global Navigation Satellite System receivers for comparison.
Abstract: Electron density measurements from the Floating Potential Measurement Unit (FPMU) onboard the International Space Station allow us to observe the structure of the equatorial ionosphere. During two geomagnetically quiet time periods, we examined the equatorial F‐region structure at night using FPMU electron density measurements along with Swarm spacecraft electron density measurements and Total Electron Content from ground‐based Global Navigation Satellite System receivers for comparison. During these time periods, the equatorial ionization anomaly (EIA) extended to local times late as post‐midnight in some cases. The EIA occurrences at night showed a longitudinal dependence. The mean density of the EIA peaks exhibited a 3‐wave pattern in longitude likely due to lower atmospheric planetary wave activity, similar to the longitudinal dependence previously observed in the EIA.