Marshall Frith https://marshallfrith.com Build logs and tutorials for satellite imagery tooling, TAK integrations, and field software that runs on your own machine. en-us Sat, 15 Aug 2026 20:58:16 +0000 Moving Files Phone to Phone With Nothing But a Screen https://marshallfrith.com/projects/flicker-optical-file-transfer/ https://marshallfrith.com/projects/flicker-optical-file-transfer/ Sat, 08 Aug 2026 00:00:00 +0000 One handset blinks animated QR codes, the other films it, and a byte-identical file comes out. Fountain codes, because there is no back channel. Finding Ships in Radar, Without a Neural Net https://marshallfrith.com/projects/sentinel-1-ship-finder/ https://marshallfrith.com/projects/sentinel-1-ship-finder/ Fri, 07 Aug 2026 00:00:00 +0000 A local SAR vessel detector built on free Sentinel-1 imagery. CFAR detection, a physics-based classifier, and an honest accuracy number. A TAK Server in Pure Python, No TAK.gov Account https://marshallfrith.com/projects/marshall-tak-server/ https://marshallfrith.com/projects/marshall-tak-server/ Tue, 28 Jul 2026 00:00:00 +0000 Cursor-on-Target over TCP and UDP, SQLite for state, a Leaflet dashboard, and a setup wizard that hands a new operator a QR code.