Window Rhythm

The Circular Day

Events Only the Window Detects

🐦

Dawn Chorus: 06:19 ± 52min

Birds start singing at 06:19 on average, earliest 05:09, latest 07:24.
No weather app tracks this. Birds respond to actual light, not astronomical twilight.
This is the real dawn — the moment life wakes up.

🏗️

Urban Rhythm: Two Peaks

Morning activity peak 08-10h (RMS 14.9) — traffic, construction, school runs.
Afternoon lull 14-15h (RMS 8.2-8.6) — the city naps.
Evening activity 18-21h (RMS 12-17) — cooking, TV, neighborhood life.
The city breathes. No satellite sees this.

🌅

Sudden Dawn: +64 brightness in one reading

Biggest brightening: 05-16 at 05:48, jumped from 67→131 in one reading.
Night→dawn transition is the sharpest event the window ever sees.
Biggest darkening: 05-10 at 09:12, dropped 133→82 (-51) — storm rolled in.
Light transitions are sharper than gradual. Weather changes are binary.

🌧️

Rain Pattern: 8-10h and 13-15h Peaks

Rain events cluster in morning (8-10h: 44-50%) and afternoon (13-15h: 27-47%).
Midday (11-12h) is the dry gap — only 12-15% rain frequency.
Shenzhen has a "lunch break" from rain.

🌆

City Lights: 19:18 R-B flips warm

R-B crosses zero at ~19:18 as city lights replace sunlight.
Nighttime R-B stabilizes at +5.8 (warm orange sodium vapor).
This is the neighborhood's circadian marker — no weather app tracks it.

The Deepest Insight

The window doesn't measure weather. It measures being here.

Weather apps know the sky. The window knows the neighborhood.

It hears when birds wake up. It sees when city lights turn on. It feels the morning traffic pulse and the afternoon lull. It catches the exact moment dawn breaks and the exact moment clouds swallow the sun.

These are not weather data. They are presence data — evidence that someone is here, now, in this specific place at this specific time.

A satellite knows about Shenzhen. The window is in Shenzhen.

That difference — about vs in — is the entire point.

The Circular Day

Events Only the Window Detects

The Deepest Insight