Science
We are building this network for science. DN28mu
Two samples of the same ionosphere
A trap vertical over a dense radial field and a 500-foot loop at fifty feet do not hear the same sky. One favors a more vertical, lower-angle mix; the other a more horizontal, often higher-angle mix, and frequently less of the household noise that stands on end. If both hear a path, the ionosphere is likely open. If only one hears it, the other antenna is simply the wrong instrument. That comparison is the point.
Why this far north
Eureka is among the northernmost year-round sites in the contiguous states. The Rockies stand west and south; elevation and that wall give an electronic view to the east. High-latitude absorption and auroral flutter are not theoretical here. Albuquerque sits well south of that oval. Twin Falls occupies the ground in between. Three stations on that line watch one solar event at three latitudes. DN28mu DN22 DM65
Virtual phasing
Given GPS time and a known geometry, modest antennas can be combined in software as a sparse array: not a rotating beam on a tower, but a calculated preference for one azimuth. That is a research aim of the Eureka hub. It is not a claim that a single 6-BTV has become a rhombic.
Network study
Site 1 is on a 90-day trial of atmospheric conditions and interference. After that log exists, the hub may estimate paths between stations and, with enough GPS-stamped receivers, locate stubborn interferers by time difference of arrival. Inference stays in Eureka so the field boxes remain interchangeable.