China Publishes Compass /BeiDou “Test Version” of ICD; Key Data Missing
![](https://insidegnss.com/wp-content/uploads/2018/01/BeiDou ICD cover page.jpg)
[Updated January 3, 2012] China released a long-awaited “test version” interface control document (ICD) for its Compass (BeiDou-2) GNSS system today (December 27, 2011). The 11-page publication covers its open B1 civil signal centered at 1561.098 MHz.
By Inside GNSS