Published June 2, 2026 | Version v1.0
Software Open

The Empty Field That Wasn't: GPS, OTAD and Two Decades of Encrypted Broadcasts (pipeline, analysis, figures, and verifiers for the GPS L1 C/A Subframe 4 Page 17 corpus, 2007–2026)

Authors/Creators

Description

Code, data pipeline, analysis scripts, article figures, and claim-level verifiers accompanying Murdoch (2026), "The Empty Field That Wasn't: GPS, OTAD, and Two Decades of Encrypted Broadcasts" (Inside GNSS, May/June 2026). Reproduces 12,163,006 special-message observations across 3,994 unique payloads from the GFZ Potsdam navigation-bit archive, 2007-06-19 to 2026-01-23.

Files

sjmurdoch/gps-special-messages-v1.0.zip

Files (7.8 GB)

Name Size Download all
md5:40632a6f0da39afd046128b55ef5124a
7.6 GB Download
md5:a01c4e35c5ab2c2e8ab482c80ad219f3
201.0 MB Download
md5:bfcd6d81b933b8f964ab8875e23d98cc
169.2 kB Download
md5:021c27d1736dce4666015be6ba5fddcc
7.9 MB Preview Download

Additional details

Related works

Is referenced by
Journal: https://lsc-pagepro.mydigitalpublication.com/publication/?i=865273&p=62&view=issueViewer (URL)
Is supplement to
Software: https://github.com/sjmurdoch/gps-special-messages/tree/v1.0 (URL)

Software

Repository URL
https://github.com/sjmurdoch/gps-special-messages
Programming language
Julia