()service means a service which is based on polar orbiting satellites which receive and relay distressalerts from satellite EPIRBs and which provides their position . A: Geostationary satellite B: Near-polar orbiting satellite C: synchomizing satellite D. D: Terrestrial satellite

PBN is solely developed on the basis of satellite-based navigation.

People are using a new satellite-based GPS system to navigate aviation in Juneau, Alaska.00a0（

satellite

What cannot be concluded about the satellite images A: Satellite images are useless for calculating forest loss. B: Satellite images cannot detect forest loss by selective logging. C: Satellite images were not accurate because of changing environmental factors. D: Satellite images showed half or less of the actual deforestation in Brazilian Amazon.

Beidou Satellite Navigation system is a global satellite navigation system developed by China, and it is also the _________ mature satellite navigation system. A: first B: second C: third D: fourth

Navigation Satellite System

Which is wrong among the following statements about satellite communication? A: Satellite communication has a large communication distance and a wide coverage range B: It is easy to realize broadcast communication and multiple access communication by using satellite communication C: The advantages of satellite communication are that it is not affected by climate and its bit error rate is very low D: High communication cost and large delay are the shortcomings of satellite communication

Weeks later the second satellite was ____.

For centuries, until the first Americans reached the moon, men speculated as to______. A: What looked like the satellite' s other side B: what the satellite' s other side looks like C: what did the satellite' s other side look like D: what the satellite' s other side looks like