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SPACE GNSS RECEIVER home > Research > Space GNSS Receiver
1. ֿ GNSS ʿ伺

 ڵ ׺̼ Ϲε鿡 ̸ ˸ GPS 뺯Ǵ ׹ý(GNSS, Global Navigation Satellite System) ̹ о߿ ־ ׹ ǰ ִ. ڵ, , , ׹ý ̾, ý ΰ, ߻ü, Ž ϰ ý ɼ ϰ , ǿ ʵ ǰ ִ.

  ׹ ˵ GPS ű⸦ , NORAD TLE (US SPACE COMMAND TWO-LINE-ELEMENT) ܺ ͳ Satellite Laser Ranging, Radar Tracking ̵ ڱ Ǵ ڻ Ͽ ǽð ġ ˵ ִٴ ִ. , km ϴ Ͽ GPS , m ų ־ Ȯ 鿡 ִ.

 ֿ, Ư ΰ GNSS ̿ϴµ, ū Ǵ κ GNSS 뼺̴. ΰ , ſ ̸, ü ȸ ϱ , ü ÷ ٲ ȴ. ̷ 󿡼 ٸ Ư ̰ DZ , ̷ κ ʿ䰡 ִ.

 ֱٿ ̱ GPSӸ ƴ϶, þ GLONASS غϰ , Galileo Ʈ ǰ ִ. ܿ پ ׹ ׹ 񽺰 غ ߿ ִ. ֿ ̿ ִ ׹ ȣ ũ ȮǾ, ֿ GNSS Ȱ뿡 뼺 ذ ִ ɼ ִ. ֿ GNSS ȣ Ʒ Ư ´.
 
Figure 1. GNSS signal in the space
 
 
2. ˵ GNSS ű

 ˵ ʼ 8km ̵ ϰ ڼ ÷ ٲǷ, ׹ ü ÷ ٲ ÷ ȭ ũ. ̷ ȯ濡 ϱ Ͽ Ϲ ڿ ˵ GNSS ű⸦ Ѵ. ˵ GNSS ű ū ÷ Ͽ ȣ ȹ ÷ ˻ Ȯ ʿ䰡 , ̿ 귮 ذϱ Ͽ A-GPS ִ. ˵ ̵ ȣ ġǷ ݼ ϰ ʿ䰡 ִ.

  ǿ Ͽ ˵ GNSS Ʈ ϰ ִ. ش Ʈ GPS L1 ȣӸ ƴ϶ L2C, L5ȣ Բ ϰ Galileo ý E1B, E5a ȣ óϿ Ƽ , Ƽ ý Ȱ ׹ ϵ Ǿ. ׸ ˵ ű Ÿ ̴.

 
Figure 2. Multi-Band Software GNSS Receiver Structure for LEO
 
 
3. / GNSS ű

 / ˵ ̵ GNSS ˵ ξ DZ GNSS ȣ ϴ ü ſ ȴ. / ߽ Ͽ ۵Ǵ GNSS ȣ κ ȣ Ϻο ̵ κ ȣ Ͽ Ǵµ, ü Ȯϱ , ȣ ܿ ߰ ˵ ͸ ϰ ȴ. ȣ ϴ ̶ ϴ GNSS ȣ ۽Ŵܿ / Ŵܱ km Ÿ ġ鼭 ȣ Ⱑ ũ ǹǷ, ̾ ȣ ó ִ ʿϴ.

  ǿ Ͽ / GNSS Ʈ ϰ ִ. ش Ʈ GPS L1 ȣ ϸ ̾ ȣ ó Ͽ ȣ нð ms Ű Ͽ. ̷ нð Ű ؼ ڵ ÷ ȿ ϰ, ׹ Ʈ ׹ Ʈ ϴ ˰ ʿϴ. ׸ / Ʈ ̿Ͽ ̾ȣ(23dB) ó Ÿ ̴. ȣ Ķ͵ ϸ ȣ ̷ Ȯ ִ.
 
Figure 3. Signal Tracking Results for Weak Signal
 


 
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