Rob Robinett, AI6VN. "WsprDaemon: A low cost, high performance, all band WSPR decoding system". ARRL / TAPR Digital Communications Conference, Detroit, 2019.
Rob Robinett, AI6VN. Presenting "Estimating LF-HF band noise while acquiring WSPR spots" on behalf of co-authors Gwyn Griffiths G3ZIL and Glenn Elmore N6GN. ARRL / TAPR Digital Communications Conference, Detroit, 2019.
Scroll to 48min23sec for Rob's presentation within the HamSCi session. Click for pdf of the slides .
Rob Robinett, AI6VN. "Introduction to the KiwiSDR and Bodnar GPSDO". HamSci Workshop, Case Western Reserve University, Cleveland, 2019.
Gwyn Griffiths, G3ZIL, Rob Robinett, AI6VN, Glenn Elmore N6GN et al. "Patterns in received noise: Methods, Observations and Questions". HamSci Web Workshop, University of Scranton, Pa., 2020.
Presentations
Gwyn Griffiths, G3ZIL and Rob Robinett, AI6VN, "Aids to the presentation and analysis of WSPR spots: TimescaleDB database and Grafana". ARRL / TAPR Virtual Digital Communications Conference, 2020. Click here for pdf files of the slides and the speaking notes.
Scroll to 59min40sec for Gwyn's presentation within the ARRL/TAPR DCC Saturday presentations video.
Gwyn Griffiths, G3ZIL and Rob Robinett, AI6VN, "Visualising propagation to mid-latitudes from a shipboard WSPR transmitter on a passage from 27˚N to 70˚S using the WsprDaemon database, and how to access the data". HamSci Web Workshop, University of Scranton, Pa., 2021. Click for the iPoster and narration.
Gwyn Griffiths, G3ZIL and Glenn Elmore, N6GN, "Contrasting Effects of the 3–5 November 2021 Geomagnetic Storm on Reception in Colorado of WSPR Transmissions from North-Eastern North America and those throm Australia". HamSci Workshop, Huntsville, Alabama, March 2022. Click for the Presentation and the Narration.
Gwyn Griffiths, G3ZIL, Glenn Elmore, N6GN, Rob Robinett, AI6VN, Lynn Rhymes, WB7ABP and John Watrous, K6PZB, "FST4W on the HF bands: Why - What to expect - Equipment - Results ". ARRL/TAPR Digital Communications Conference, Charlotte, N.C., September 2022. Click for the Paper, Presentation, and the Speaking Notes. The full proceedings are availabe via TAPR.
Gwyn Griffiths, G3ZIL and Nigel Squibb, G4HZX "Propagation path analysis on the HF bands using Software Defined Radio and FST4W". SDR Academy , Friedrichshafen, Germany, June 2023. Click for the Presentation slides. Click on the graphic at left and scroll to 1:05:47 for Nigel's talk. Our paper received the Ulrich Rohde Award for innovative research involving SDRs. The Awards were announced from 02:44:55.
Rob Robinett, AI6VN "Frequency accurate WSPR/FST4W transmissions using the QRP Labs QDX and RFZero". HamSci Workshop, Scranton, Pa., March 2023. Click for the Presentation. Click on the graphic at left and scroll to 5:35:30 in the YouTube video for Rob's talk.
Gwyn Griffiths, G3ZIL "Identifying 14 MHz propagation modes using FST4W SNR and spectral spread". HamSci Workshop, Scranton, Pa., March 2023. Click for the Presentation and the Speaking Notes.
A paper based on this material presented at HamSci has been accepted by ARRL for publication in QEX in May 2024.
Rob Robinett AI6VN, Gwyn Griffiths G3ZIL, Glenn Elmore N6GN, Clint Turner KA7OEI and Phil Karn KA9Q "Ham Band WSPR beacons as Sources of Ionosphere Measurements". Click for the Abstract and for the Poster at the American Geophysical Union Fall Meeting, San Francisco, 15 December 2023.
Image courtesy Clint Turner - his complete multi-band transmitter specially designed and built for the HamSci 14 October 2023 Eclipse Study.
Gwyn Griffiths G3ZIL, Devin Diehl, Rob Robinett AI6VN and Lynn Rhymes "HF Two-hop Sidescatter: Identification, Modeling and Observations of an Underappreciated Propagation Mode". Click for the Abstract and for the Poster at the American Geophysical Union Fall Meeting, San Francisco, 24 January 2024.
Gwyn Griffiths G3ZIL "October 2023 Eclipse: Effects on HF Propagation - as seen using WSJT-X mode FST4W" an online talk to the Norfolk Amateur Radio Club, 24 January 2024. Click for the Presentation slides and the speaking notes.
Gwyn Griffiths G3ZIL "Propagation at HF: What can we learn using digital modes WSPR and FST4W?" an online talk in the Radio Society of Greart Britain 'Tonight@8' series, 5 February 2024. Click for the Presentation slides and the speaking notes.
Gwyn Griffiths G3ZIL "Analysis of Changes to Propagation and Refraction Height on Specific Paths Induced by the 14 October 2023 Eclipse". A presentation at the HamSci 2024 Workshop, 22-23 March, 2024, Case Western Reserve University. Click for the Abstract, the presentation slides and the speaking notes.
Rob Robinett AI6VN "The WsprDaemon Grape Reporting Network". A presentation at the HamSci 2024 Workshop, 22-23 March, 2024, Case Western Reserve University. Click for the Abstract.
Rob Robinett AI6VN and Paul Elliott WB6CXC "High resolution Propagation Measurements for the HamSci PSWS using RX888 receiver an WsprSonde-8" a presentation at the HamSci Forum at Hamvention, Xenia, 17 May 2024.
Nathaniel Frissell, W2NAF, et al. "Multi-Band GNSS-Disciplined WSPR and HF Doppler Ionospheric Observations using the RX-888, KA9QRadio, WsprDaemon and the WSPRSonde" a CEDAR Maker's Club presentation at the National Science Foundation Coupling, Energetics and Dynamics of Atmospheric Regions (CEDAR) workshop , 9-14 June 2024, San Diego.
Rob Robinett AI6VN and Paul Elliott WB6CXC "High resolution propagation measurements for the HamSCI Personal Space Weather System using a WsprDaemon + RX888 16-bit 0-30 MHz SDR and a WsprSonde-8 160-6 m WSPR/FST4W beacon" a presentation at the SDR Academy'24 at Friedrichshafen, Germany, June 2024. Rob and Paul were awarded a 2024 Ulrich Rohde Prize for their work.
Gwyn Griffiths G3ZIL "HamSCI - Ham Radio Science Citizen Investigation - Connecting Communities". A presentation at the Radio Society of Great Britain Convention 12-13 October, 2024, Milton Keynes, UK. Click for the presentation slides and the speaking notes.
Gwyn Griffiths G3ZIL "Using Digital_RF data to derive Doppler Shift and Ionospheric Heights: Steps Along the Way". A presentation at the HamSCI Science Telecon, 31 October 2024. Click for the presentation slides and the speaking notes.
WsprDaemon
Robust decoding and reporting for WSPR FST4W FT8 FT4 WWV WWVH CHU
Gwyn Griffiths G3ZIL "Post-sunset Sporadic F propagation: A Sign of Electron Density Isopleth Convergence?" A presentation at the 2025 HamSCI Wprkshop, Newark, NJ 14-15 March 2025. Click for the presentation slides, the speaking notes and the abstract.
Michael Hauan AC0G and coauthors "Interim Findings of the HamSCI DASI2 HF Antenna Project" A presentation at the 2025 HamSCI Wprkshop, Newark, NJ 14-15 March 2025. Click for the presentation slides and the abstract.