Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Nathaniel Frissell"'
Autor:
Hyomin Kim, David Witten, Julius Madey, Nathaniel Frissell, John Gibbons, William Engelke, Anderson Liddle, Nicholas Muscolino, Joseph Visone, Zhaoshu Cao
Publikováno v:
HardwareX, Vol 20, Iss , Pp e00580- (2024)
As part of Ham Radio Science Citizen Investigation (HamSCI) Personal Space Weather Station (PSWS) project, a low-cost, commercial off-the-shelf magnetometer has been developed to provide quantitative and qualitative measurements of the geospace envir
Externí odkaz:
https://doaj.org/article/86429ed762f74b3da570728078bbac83
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
It has been shown that a proxy determination of the magnetospheric open–closed magnetic field line boundary (OCB) location can be made by examining the ultra-low-frequency (ULF) wave power in magnetometer data, with particular interest in the Pc5 U
Externí odkaz:
https://doaj.org/article/88307f01a9754d029c8f3e2af9736869
Autor:
Vincent Ledvina, Laura Brandt, Elizabeth MacDonald, Nathaniel Frissell, Justin Anderson, Thomas Y. Chen, Ryan J. French, Francesca Di Mare, Andrea Grover, Karl Battams, Kristine Sigsbee, Bea Gallardo-Lacourt, Donna Lach, Joseph A. Shaw, Michael Hunnekuhl, Burcu Kosar, Wayne Barkhouse, Tim Young, Chandresh Kedhambadi, Dogacan S. Ozturk, Seth G. Claudepierre, Chuanfei Dong, Andy Witteman, Jeremy Kuzub, Gunjan Sinha
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
Citizen science connects scientists with the public to enable discovery, engaging broad audiences across the world. There are many attributes that make citizen science an asset to the field of heliophysics, including agile collaboration. Agility is t
Externí odkaz:
https://doaj.org/article/76534417a74f4faab4d913473561ec2a
Publikováno v:
HardwareX, Vol 11, Iss , Pp e00289- (2022)
Crowd sourced data collection among the international community of amateur radio operators and shortwave listeners has great potential for addressing problems of under-sampling in the geospace system. Quantitative Doppler measurements of high frequen
Externí odkaz:
https://doaj.org/article/8bf8ff8d0d3747d08ccb44c97f68d30e
Autor:
Kristina Collins, John Gibbons, Nathaniel Frissell, Aidan Montare, David Kazdan, Darren Kalmbach, David Swartz, Robert Benedict, Veronica Romanek, Rachel Boedicker, William Liles, William Engelke, David G. McGaw, James Farmer, Gary Mikitin, Joseph Hobart, George Kavanagh, Shibaji Chakraborty
Publikováno v:
Earth System Science Data. 15:1403-1418
Ionospheric variability produces measurable effects in Doppler shift of HF (high-frequency, 3–30 MHz) skywave signals. These effects are straightforward to measure with low-cost equipment and are conducive to citizen science campaigns. The low-cost
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::619f69c5b51d4da5aa41166cbec60e09
https://doi.org/10.5194/essd-15-1403-2023
https://doi.org/10.5194/essd-15-1403-2023
Publikováno v:
IEEE Geoscience and Remote Sensing Letters. 19:1-5
Doppler shift measurement using time standard stations as passive radar beacons is well-established as a means of estimating virtual ionospheric height. A community science experiment in distributed Doppler shift measurement was conducted in October
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f24b670ee7899ff8933472901c83175
https://doi.org/10.1109/lgrs.2021.3063361
https://doi.org/10.1109/lgrs.2021.3063361
Autor:
Kristina Collins, John Gibbons, Nathaniel Frissell, Aidan Montare, David Kazdan, Darren Kalmbach, David Swartz, Robert Benedict, Veronica Romanek, Rachel Boedicker, William Liles, William Engelke, David G. McGaw, James Farmer, Gary Mikitin, Joseph Hobart, George Kavanagh
Ionospheric variability due to atmospheric coupling produces measurable effects in Doppler shift of HF (high frequency, 3–30 MHz) skywave signals. These effects are straightforward to measure with low-cost equipment and are conducive to citizen sci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::deb7aa44140d6f75b4e0fc3203512115
https://essd.copernicus.org/preprints/essd-2022-303/
https://essd.copernicus.org/preprints/essd-2022-303/
Publikováno v:
eISSN
We demonstrate a methodology to estimate ionospheric virtual layer height characteristics using Doppler measurements from frequency locked time standard stations in conjunction with ionosonde measurements and ray-tracing models. We consider data from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::926ee7bec1274a768748fa81fe890c79
https://egusphere.copernicus.org/preprints/2022/egusphere-2022-327/
https://egusphere.copernicus.org/preprints/2022/egusphere-2022-327/
Autor:
Nathaniel Frissell, Veronica Romanek, Ethan Miller, Philip Erickson, William Engelke, Roland Luetzelschwab, Robert Gerzoff, Frank Howell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98f802d8ef149ead2f168a26bd2ed6c9
https://doi.org/10.1002/essoar.10510706.1
https://doi.org/10.1002/essoar.10510706.1
Autor:
Diego Sanchez, Nathaniel Frissell, Gareth Perry, V LYNN HARVEY, William Engelke, Anthea Coster, Philip J Erickson, John Michael Ruohoniemi, Joseph B. H. Baker
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28100fe194a3eb5b2f4f6367bcf18c5a
https://doi.org/10.1002/essoar.10510601.1
https://doi.org/10.1002/essoar.10510601.1