Based on the methods which have been technology maturation in our country, and referenced some satellite-to-satellite ranging methods overseas, summarizing approximately three types feasible ranging system: Carrier phase ranging, PN code ranging, carrier phase smoothing PN code ranging.

Development and trend research of inter-satellite communicationsystem on formation small satellites;

The discontinuous coverage model,inter-satellite links geometry model and bistatic moving target detection geometry model,which can describe the working properties of the SBR constellations,were developed.

The satellite network with inter-satellite links plays an important role in space communication network and its routing algorithm should be universal,concise and reliable.

Satellite network with inter-satellite links has many particular advantages and it receives more and more recognition in both commercial and military fields.

This paper introduces the sense of movement of Japan in developing the snooper satellite, the carrier rockettechnique and the satellite navigation system, and reveals Japan’s ambitions of seeking to occupy Chinese Diaoyu Islandand some words ofthreateningChina.