The TangerineSDR is the TAPR-HamSCI joint project to create a software defined radio that meets the joint needs of the amateur and scientific communities. The TangerineSDR is slated to be at the heart of the high-performance version of the HamSCI Personal Space Weather Station. In his January/February 2020 QEX article, TangerineSDR Chief Architect Scotty Cowling WA2DFI explains the requirements and use cases of the TangerineSDR. Full text of the article is availble here. Reprinted with permission; copyright ARRL.
This week, many HamSCI members are presenting their research at the American Geophysical Union (AGU) Fall Meeting in San Francisco. The AGU Fall meeting is one of the largest geoscience meetings in the world, and consists of about 24,000 attendees. The scientific program includes sessions pertaining to all areas of geophysics, including space weather, the solar wind, auroral activity, the ionosphere, and the neutral atmosphere. Below is a list of selected presentations and sessions being given by HamSCI members, or of general interest to ham radio operators. The complete scientific program is available here.
Read more for a selected list of presentations by and/or of interest to HamSCI.
HamSCI has an opening for a Post-Doctoral Research Associate! Please see the advertisement below.
The University of Scranton Department of Physics and Engineering seeks a post-doctoral research associate starting in Spring/Summer 2020 in support of a recently awarded NSF-supported Distributed Array of Small Instruments (DASI) grant to develop a prototype Personal Space Weather Station. The successful post-doctoral researcher will conduct software development, and subsequent scientific studies, for a multi-site geographically distributed high frequency (HF; 3 – 30 MHz) software defined radio (SDR) network using signals of opportunity. Primary responsibilities will involve the development and implementation of an ionospheric sounding algorithm using the HF observation network for the purpose of studying geospace phenomena: traveling ionospheric disturbances, ionospheric responses to solar flares, geomagnetic storms and substorms, and other space weather effects. The ideal candidate will have expertise in ionospheric remote sensing, geospace physics including the ionosphere and thermosphere, and digital signal processing algorithm development and implementation.
As part of the HamSCI Personal Space Weather Station project, TAPR is charged with developing a Scientific Software Defined Radio that operates from a few kHz up to 30 MHz with a focus on flexibility, high precision stability, and accurate time stamping. TAPR has taken this charge to develop the TangerineSDR, a modular software defined radio that will not only meet HamSCI's PSWS needs, but also many other applications. In the videos below, the chief architect of the TangerineSDR, Scotty Cowling, WA2DFI, shows off a mock-up of the new radio at the 39th Annual ARRL-TAPR Digital Communications Conference that took place in Detroit, MI from September 11-13, 2020. People who would like to participate in PSWS and TangerineSDR development are encouraged to visit tangerinesdr.com, join the TAPR TangerineSDR listserv, and join in the Monday night TeamSpeak telecons.
By Nathaniel A. Frissell (W2NAF), Philip J. Erickson (W1PJE), Ethan S. Miller (K8GU), William Liles (NQ6Z), Kristina Collins (KD8OXT), David Kazdan (AD8Y), and Nathaniel Vishner (KB1QHX)
Photo by Laura Gooch (N8NFE)
The Ham Radio Science Citizen Investigation (HamSCI) is an international collective of professional researchers and amateur radio operators working together to simultaneously advance the fields of space science and amateur (ham) radio activities. The 2nd US HamSCI meeting was held March 22-23, 2019, organized by Nathaniel Frissell of the New Jersey Institute of Technology (NJIT) and hosted by the Case Amateur Radio Club (Case ARC) at Case Western Reserve University (CWRU) in Cleveland, OH. The theme of this year’s meeting was “Ionospheric Effects and Sensing,” which includes the use of amateur radio techniques for the characterization and observational study of ionospheric phenomena such as traveling ionospheric disturbances, sporadic E, response to solar flares, geomagnetic storms, and other space weather events.
This article starts with a brief description of historical observations that have been made concerning the effects of solar eclipses on the strengths of distant medium wave signals. It continues with a description of how medium-wave DXers used software defined radios (SDRs) for the first time during the solar eclipse of August 2017 to record the entire AM broadcast band (535-1705kHz) for later analysis. Although no plan had been made to create a formal experiment, it appears to be possible to use the data collected to analyze the effect of the eclipse on radio propagation. An example is presented, derived from recordings made at four different receiver locations in western North America, describing large variations in the signal strength from Salt Lake City's KSL-1160kHz during the course of the eclipse. The times that peak signal strengths occurred at the four locations are then compared relative to the times of eclipse totality along the signal paths.
HamSCI will again be at the Dayton Hamvention as part of the new Ham Radio 2.0: Innovation and Discovery area sponsored by the Yasme Foundation. Come visit the HamSCI Booth and Forum to learn about projects on the cutting edge of ham radio science and engineering research, including new directions in Sporadic E research, causes of F region ionospheric variability, how propagation works on the new 630 and 2200 m bands, the Personal Space Weather Station, and more. Hamvention will be held May 17-19, 2019 at the Greene County Fairgrounds in Xenia, Ohio.
Congratulations to the Case Amateur Radio Club for their second place score (out of 114 entries nation-wide) in the ARRL’s Frequency Measurement Test! The hosts of this year’s HamSCI workshop, W8EDU was able to measure the frequency of one 80 meter and one 40 meter transmission from K5CM to 0.03 and 0.02 Hertz, respectively. First place station W4VU in North Carolina won by only a slight margin of 0.01 Hz on 80 meters (a difference of one part per billion in the measurement).