Which of the following statements about the constellation of GPS is correct？ ( )
A: GPS is a passive system for users
B: GPS works for 24 hours/day and 7 days/week
C: GPS is designed to provide positioning and timing information
D: GPS is an active system for users
A: GPS is a passive system for users
B: GPS works for 24 hours/day and 7 days/week
C: GPS is designed to provide positioning and timing information
D: GPS is an active system for users
举一反三
- Who will be the first users of Galileo, the new satellite navigation system A: Rescue workers B: B. GPS users C: European drivers
- GPS(Global Positioning System) 是美国发展的全球卫星定位系统。GPS 定位的基本原理是______
- The 24 satellites in the Global Positioning System ( GPS ) are synchronous satellites, and they appear to be stationary to an observer on the earth.
- In the GPS system, the two known points are provided by one GPS satellites.
- GPS的全称为()。 A: Global Position System B: 地理信息系统 C: 全球定位系统 D: Geographic Information System