Twenty-Nine Shadows From Fourteen Hundred Kilometres Southeast

22:47 — Searched for “GRAVES meteor scatter” because I wanted to know what frequency everyone else is monitoring. 143.050 MHz. French military radar in Dijon transmitting straight up. Omnidirectional. Continuous. Twelve meteors per hour during quiet periods, hundreds during showers. The forum posts said you don’t listen to the radar directly—it’s below your horizon, 1,400 km southeast. You listen for the echo.

Forward scatter. Detecting the shadow, not the source.

23:02 — Receiver pulled from the same field case as the wildlife tracking attempt. Charged battery, attached the three-element Yagi, aimed it 15° above the horizon pointing southeast. Fed audio into the laptop. Audacity recording, level set to catch faint pings.

The band was silent. Not quiet—silent. No carrier, no hiss, nothing. That’s correct. GRAVES is transmitting 1,400 km away into a radar horizon I can’t see. The signal should be absent until a meteor trail at 85-120 km altitude creates a temporary mirror.

23:11 — First ping. Half a second, rising chirp, 143.050 MHz spike on the waterfall. Checked the timestamp: 23:11:34 UTC. Audacity waveform shows 0.6 seconds of reflected carrier before it faded. Ionization trail lasted just long enough to bounce the radar signal from Dijon to Alberta.

That’s one meteor confirmed without seeing the sky.

23:18 — Second ping, 0.3 seconds. Third at 23:22, maybe 0.9 seconds—long enough that I heard the Doppler shift as the trail dispersed. Starts high, drops in pitch. The plasma column is expanding, changing geometry, and the reflected frequency slides downward as the effective path length increases.

One trillion meteors per day enter the atmosphere. Most are sand grains. The ionization trail is under a meter wide but tens of kilometers long. A filament of plasma hanging in the mesosphere for fractions of a second before electron recombination kills the conductivity.

23:34 — Logging rate: eleven pings in twenty-three minutes. Below the expected twelve per hour but within variance. This isn’t a meteor shower—just the background sporadic rate, meteoroids catching up to Earth’s trailing edge at 11 km/sec minimum. The morning side would see two to three times this count. Head-on collisions at 72 km/sec.

Lichen spot test timing discipline applies directly. Potassium hydroxide on atranorin flashes yellow in under one second. You set up the slide, apply reagent, watch—or you miss it. Meteor reflections last 0.1 to 2 seconds. Same constraint: prepare the monitoring system, wait patiently, catch the transient event when it occurs. Both are chemistry creating electromagnetic signatures faster than human reaction time.

23:51 — The K test parallel runs deeper. Both are about presence, not magnitude. The lichen reagent either reacts or it doesn’t—intensity doesn’t matter, you’re checking for atranorin yes/no. Meteor scatter either reflects the carrier or it doesn’t. You’re not measuring signal strength on a continuous scale; you’re detecting discrete ionization events. Binary detection of fleeting phenomena.

Which inverts the thirty years of amateur radio practice focused on transmitting. VE6SLP since 1997, and most of that time spent hunting for the loudest signal, optimizing antenna gain, pushing power. The wildlife tracking RDF taught me to hunt nulls instead of peaks—the silence where the Yagi’s perpendicular is more precise than the maximum. Now meteor scatter extends that inversion: you’re listening for shadows, not sources. The absence of a signal (GRAVES below your horizon) punctuated by brief moments when ionized plasma creates a path that shouldn’t exist.

00:14 — Ping rate increased. Sixteen in the last hour. Checked the American Meteor Society’s live shower forecast—no active radiants tonight. Just sporadic background. The rate varies: time of night, time of year, leading vs trailing edge of Earth’s orbit. September sees two to three times as many sporadics as March. Pre-dawn hours see two to three times as many as evening. Combined, that’s a factor-of-nine variance across the year.

00:31 — Long event. 2.1 seconds of continuous reflection. Waveform shows multiple Doppler shifts—either a large meteoroid creating a dense trail, or the geometry happened to align so the reflection lasted longer. These are the ones SNOTEL used. USDA’s snow water monitoring system: 900 unmanned stations across eleven western states, polled via meteor scatter for over forty years until 2023. Each group of sixty stations took five minutes to poll. Throughput averaged 115-310 bits/second depending on season. Vastly cheaper than satellites for non-real-time data where you can wait for the next meteor.

00:52 — Eight more pings logged. Timestamps, durations, rough Doppler characteristics. James Stanley Hey confirmed meteor trails reflect radio signals in 1944 while researching upward-pointed radar to detect V-2 missiles over London. The October Draconid storm of 1946 did for radio meteor science what the 1833 Leonid storm did for visual meteor astronomy—spawned an entire field.

This is environmental monitoring with the same patience structure as radon mapping. Set up the equipment. Log over time. Wait for the atmosphere to emit something measurable. Radon’s 3.8-day half-life created natural timing. Meteor scatter’s timing is stochastic—you get twelve per hour on average, but they arrive unpredictably. Both require learning to work within constraints the environment sets, not ones you control.

01:18 — Twenty-nine pings total. Rate holding steady around eleven to thirteen per hour. Yagi still aimed southeast, 15° elevation. The geometry matters: GRAVES transmits straight up, meteor trails form at 85-120 km, midpoint between Dijon and Alberta is ideal reflection altitude. Move the antenna and you’re sampling a different volume of sky.

Saved the Audacity file. 2 hours 31 minutes, 668 MB. Twenty-nine discrete ionization events, each one a sand grain burning up fast enough to rip electrons off atmospheric molecules and create a temporary radio mirror.

No visual confirmation. Didn’t see a single meteor. The clouds are low tonight, and it wouldn’t matter—most of these grains are too small to produce visible light. Radio detection doesn’t care about clouds, daylight, or magnitude. You’re measuring ionization density, not photons.

Session ended 01:18. Battery at 47%. Twenty-nine meteors logged without looking up once.