Skiðblaðnir (CLIENT_BASE) and Ἀργώ (CLIENT_MUTE) are collocated so positive SNR is expected. Likewise the positive SNRs within the greater Muskegon area are explicable. Technically, though, Sheboygan, Muskegon, and Milwaukee are each over the horizon from one another so any signal at all (even with greatly negative SNR) is remarkable. Getting a round-trip twice within 24 hours is outstanding. I believe (and I am unanimous in this) that the high temperature gradient over the cool waters of Lake Michigan causes refraction of the radio waves. Thus, the apparent horizon is much farther out than supposed.
Of course, these conditions are exceptional and successful traceroutes even under such conditions are rare.
I've logged a couple of traceroutes that crossed state lines:
2026-06-23 20:50
2026-06-24 03:28
Skiðblaðnir (CLIENT_BASE) and Ἀργώ (CLIENT_MUTE) are collocated so positive SNR is expected. Likewise the positive SNRs within the greater Muskegon area are explicable. Technically, though, Sheboygan, Muskegon, and Milwaukee are each over the horizon from one another so any signal at all (even with greatly negative SNR) is remarkable. Getting a round-trip twice within 24 hours is outstanding. I believe (and I am unanimous in this) that the high temperature gradient over the cool waters of Lake Michigan causes refraction of the radio waves. Thus, the apparent horizon is much farther out than supposed.
Of course, these conditions are exceptional and successful traceroutes even under such conditions are rare.