The article investigates a long-overlooked part of the GPS L1 C/A navigation message: Subframe 4, Page 17, a 176-bit “special message” field reserved for content at the discretion of the operating com
The article investigates a long-overlooked part of the GPS L1 C/A navigation message: Subframe 4, Page 17, a 176-bit “special message” field reserved for content at the discretion of the operating com