Mode S Technology
Says the FAA wrote the specifications, with LL's help.
FAA did scheduling and tracking algorithms. LL did the message structure,
format, modulation and encoding.
Quotes from interview with Edmund Koenke - 12/7/00
Edmund Koenke joined the FAA in 1973 and worked on DABS development with
"I worked with Neal Blake on preparing the initial
specification...while I was in the FAA."
"[LL] designed the message structure, format, modulation, the actual
24-bit polynomial for error correction."
"We did the scheduling, tracking algorithms."
"We did the specification in terms of capacity, whether schedulng
algorithms...the Los Angeles basin 1995 model...we used that model to get
the scheduling algorithms to send messages."
"We had the acquisition, we had the actual Mode S surveillance, send up
"The major reason for the data link was IPC."
"What [DABS] was intended to do was drive the IPC display...TCAS now does