BeiDou ICD: Signal Spec Are Free At Last

摘要

The interface control document (ICD) describing the details of the BeiDou B1 I open service signal on 1561.098 MHz was released December 27 at a news conference held in Beijing by the Chinese State Council Information Office. The ICD includes details of the navigation message, parameters of the satellite almanacs, and ephemerides that did not appear an earlier, incomplete version of the ICD released at the end of 2011.