选择可用性 meaning in English
selective availability {= sa
Examples
- The precision of traditional gps standard positioning is not satisfied , it is limited within 10 - 15 meters even though sa has been canceled . differential global position systems have been developed greatly
传统的gps标准定位精度并不高，在取消sa选择可用性之后为10 - 15米，这极大限制了中高等精度定位的应用。