Patent ID: 9739876
Date: 2017-08-22
CPC Classifications: G01S

Claim:
1. A method comprising: sending a first signal via a first moving platform, the first signal to be received by a second moving platform, the first signal comprising a first pulse having a first signature; receiving a second signal at the first moving platform, the second signal to be sent by a second moving platform, the second signal comprising a second pulse having a second signature; aligning, at the first moving platform, the first signal and the second signal to create an aligned signal; sampling, at the first moving platform, the aligned signal to identify the second pulse of the second signal based on the second signature; determining, at the first moving platform, a first duration of time between the sending of the first pulse and the receiving of the second pulse based on the respective first and second signatures; determining, at the second moving platform, a second duration of time between the sending of the second pulse and the receiving of the first pulse based on the respective first and second signatures; and determining a distance of the first moving platform relative to the second moving platform based on the first duration of time and the second duration of time.