nomadiq.net

Long-form notes on field biology, HF listening, numbers-station logs, WWV/WWVH time-signal analysis, math curiosities, and whatever else is on the bench. Posts are grouped by year with tag filters and full-text search across titles and body text.

The full quantnmr.com personal blog (pblog) lives here—Greensleeves numbers-station posts, WWV/WWVH propagation work, subtraction borrowing, and similar oddities—alongside writing from scottrobson.org WordPress. New posts land as markdown or HTML.

Home base for radio logging projects: Boston 38L CB audio logs with transcripts and search, the UDXF HF reception database, and NC Jay’s shortwave memorial archive.

Science site with the NMR blog and browser-based interactive tools like ConDX and CWSigFind. Personal pblog posts are mirrored on Random Stuff here.

Bespoke, invite-only chat boards with end-to-end encryption, your branding and domain, real-time messaging, voice and video, short-video Brevz, and a Python bot SDK—hosted on dedicated infrastructure without ads or data harvesting.

WSPR Globe plots Weak Signal Propagation Reporter (WSPR) spots on an interactive 3D Earth. Drag to rotate, scroll to zoom, and click an arc to inspect a path — who heard whom, on what band, and at what signal-to-noise ratio.

A side panel tracks live solar and geomagnetic indices (SFI, sunspot number, K and A indices, Bz) alongside analytics: total spots, unique paths, furthest contact, busiest band, and SNR summaries. Charts break down distance distribution and band activity over time.

It's a visual way to see how HF propagation is behaving right now and where openings are forming, without digging through raw spot lists.

ConDX (hosted as webcondx) is an interactive educational tool for HF radio wave propagation through the ionosphere. It walks through the physics — Chapman-layer electron density, refractive bending, absorption in the D-layer, and how foF2 and launch angle control skip distance — then lets you experiment with sliders instead of just reading about it.

The 1D model shows vertical profiles of electron density and plasma frequency, then traces ray paths and signal loss across HF bands for a chosen elevation angle. The 2D model adds horizontal ionospheric gradients (day/night terminators, tilted F-layer) and visualizes off-great-circle bending and azimuth deflection.

Useful when you want to understand why a band is open or dead, how gray-line paths work, or how changing foF2 and take-off angle affects where your signal lands.

CWSigFind is a live CW spotting dashboard. It streams recent CW spots into a sortable table: UTC time, spotted station, frequency, band, mode, country, activity notes, spotter, and comments — the usual DX-cluster fields, filtered down to CW.

A propagation panel (toggle hide/show) puts current conditions alongside the spot feed so you can see who's active on the key and whether the bands look worth a listen. Handy for finding rare DX, checking if a frequency is already occupied, or watching CW activity build during an opening.

Pair it with ConDX or WSPR Globe when you want both live activity and a feel for why the band might be open.