@conference {424,
	title = {HamSCI Distributed Array of Small Instruments Personal Space Weather Station (DASI-PSWS): Architecture and Current Status (Invited)},
	booktitle = {NSF CEDAR (Coupling, Energetics, and Dynamics of Atmospheric Regions)},
	year = {2020},
	month = {06/2020},
	address = {Santa Fe, NM (Virtual)},
	abstract = {<p>Recent advances in geospace remote sensing have shown that large-scale distributed networks of ground-based sensors pay large dividends by providing a big picture view of phenomena that were previously observed only by point-measurements. While existing instrument networks provide excellent insight into ionospheric and space science, the system remains undersampled and more observations are needed to advance understanding. In an effort to generate these additional measurements, the Ham Radio Science Citizen Investigation (HamSCI, hamsci.org) is working with the Tucson Amateur Packet Radio Corporation (TAPR, tapr.org), an engineering organization comprised of volunteer amateur radio operators and engineers, to develop a network of Personal Space Weather Stations (PSWS). These instruments that will provide scientific-grade observations of signals-of-opportunity across the HF bands from volunteer citizen observers as part of the NSF Distributed Array of Small Instruments (DASI) program. A performance-driven PSWS design (~US$500) will be a modular, multi-instrument device that will consist of a dual-channel phase-locked 0.1-60 MHz software defined radio (SDR) receiver, a ground magnetometer with (~10 nT resolution and 1-sec cadence), and GPS/GNSS receiver to provide precision time stamping and serve as a GPS disciplined oscillator (GPSDO) to provide stability to the SDR receiver. A low-cost PSWS (\&lt; US$100) that measures Doppler shift of HF signals received from standards stations such as WWV (US) and CHU (Canada) and includes a magnetometer is also being developed. HF sounding algorithms making use of signals of opportunity will be developed for the SDR-based PSWS. All measurements will be collected into a central database for coordinated analysis and made available for public access.</p>
},
	url = {http://cedarweb.vsp.ucar.edu/wiki/index.php/2020_Workshop:MainVG},
	author = {N. A. Frissell and D. Joshi and K. Collins and A. Montare and D. Kazdan and J. Gibbons and S. Mandal and W. Engelke and T. Atkison and H. Kim and A. J. Gerrard and J. S. Vega and S. H. Cowling and T. C. McDermott and J. Ackermann and D. Witten and H. W. Silver and W. Liles and S. Cerwin and P. J. Erickson and E. S. Miller}
}
@conference {283,
	title = {HamSCI HF Receiver Requirements},
	booktitle = {HamSCI Workshop 2019},
	year = {2019},
	month = {03/2019},
	publisher = {HamSCI},
	organization = {HamSCI},
	address = {Cleveland, OH},
	abstract = {<p>This paper outlines general requirements for the HAMSCI HF receiver equipment. The objectives of Scientific Research prescribe maximum performance and flexibility while the needs of the citizen science community impose significant cost constraints. The general requirements therefore balance the science capability of the HF receiver with the cost. The paper covers architecture of the receiver, key performance metrics, and trade-offs in performance. The actual equipment realization is not covered in this paper.</p>
},
	author = {T. C. McDermott}
}
