#1 Deer Awareness, #2 Morse, #3 MeasureGeo, #4 Depth, #5 AeroBusiness, article When Satellites Go Quiet, People Notice, on X @Alyia4ALX going to address this today? https://www.instagram.com/reel/DfDogFhozhg/?psln=NndreTRlem5qMzV4 @justindotnet never had the guts to call out that housing project for what it is. Since 21' I can count at least 5 shootings. Can you give me the reason they all happen in roughly same place?

#1 Deer Awareness#2 Morse#3 MeasureGeo#4 Depth#5 AeroBusinessArticle When Satellites Go Quiet, People NoticeOn X @Alyia4ALX going to address this today? https://www.insta...
Marshall Frith

Projects

When Did This Ground Change?

Live on the App Store as Sentinel-2 Clear Days. Draw a box, scrub nine years of Sentinel-2 over it, and get the date each pixel changed — with a threshold that was measured rather than chosen.

Updated Oct 7, 2026Minutes in the browserSatelliteChange detectioniOSApp StoreAccount to readVetted
The latest clear Sentinel-2 pass over Starbase at Boca Chica, 2 September 2026 — launch tower, tank farm, and the beach.

Get Sentinel-2 Clear Days on the App Store — $1.99, iPhone. Seller Marshall Tyler Frith. Support · Privacy policy.

A satellite photograph tells you what the ground looks like. It cannot tell you when it stopped looking like something else. This draws a box, pulls the clear Sentinel-2 passes over it going back to 2017 — hundreds of them, if the sky cooperated — and answers the other question: for every pixel, the date its own ground changed.

Try it in your browser →

The rest is for members

Sign in or make a free account to see how it was built.

Create an account Sign in

Source, field builds, data · Vetted

Create an account

Also on this site

Looking for the code?

It is not published. These are personal builds, and what is here is the write-up rather than the repository.

The iOS app is live on the App Store.

The browser version is here, running the same work on your own machine: try it.

If you want to read the source or run the full desktop tool, ask. Say what you are doing with it and I will usually send it over.

Ask for the code

A blue furry token monster eating tokens spilled from a Mac Studio

Tips appreciated to feed the token monster of Grok / Claude / Cursor

Tip on Venmo

Comments

Plain text only. Held for review before it appears.