GPS Anti-Jam Technology

 

¤· ½Ã½ºÅÛ ±¸¼º

- Ground segment: CS(constrol station), MS(monitor station)

- Space segment: a constellation of satellites

- Mobile users

- Augmentation systems

 

¤· ¸ñÀû¿¡ µû¸¥ ºÐ·ù

- ¹Î°£¿ë(civilian)

- ±º»ç¿ë(military)

¤· À§¼º¿¡ µû¸¥ Á¾·ù

- GPS: ¹Ì±¹

- Galileo: À¯·´¿¬ÇÕ

- GLONASS: ·¯½Ã¾Æ

 

¤· ¿ë¾î

GNSS(Global Navigation Satellite Systems): Àü¼¼°è Ç×¹ýÀ§¼º ½Ã½ºÅÛ

GPS(Global Positioning System): ¹Ì±º¿¡¼­ ¿î¿µ

GLONASS(Global Navigation Satellite System): ·¯½Ã¾Æ±º¿¡¼­ ¿î¿µ

Beidou: Áß±¹ÀÇ Áö¿ª¿ë À§¼ºÃøÀ§½Ã½ºÅÛ

Galileo: À¯·´¿¬ÇÕÀÇ À§¼ºÃøÀ§½Ã½ºÅÛ. ¹Î°£ À§¼ºÃøÀ§½Ã½ºÅÛ »ç¿ëÀÚÀÇ ´Ù¾çÇÑ ÇÊ¿ä»çÇ× ¼ö¿ë. GPS¿Í GLONASS¿¡ÀÇ ÀÇÁ¸¼º °¨¼Ò

QZSS(Quasi-Zenith Satellite System): ÇöÀç ½Ã½ºÅÛÀÇ integrity Çâ»ó, µµ½ÉÁö¿ª ºôµù½£¿¡¼­ °¡½Ã À§¼º¼ö Áõ´ë

 

¤· µ¿Çâ

- ¿©·¯ ±¹°¡¿¡¼­ Á¦°øÇÏ´Â ´Ù¾çÇÑ À§¼ºÃøÀ§ ½ÅÈ£ÀÇ ÃâÇö: ÃøÀ§Á¤È®µµ Çâ»ó, À§¼º °¡½ÃÁö¿ª(ÁöÁ¡) Áõ´ë, ¼ö½Å½ÅÈ£ °¨µµ Áõ´ë

 

[Augmentation System(AS)]

¤· ¸ñÀû: integrity, accuracy, usefulness

¤· ¼­ºñ½º ¹üÀ§: Àü¼¼°è(global), Áö¿ª(loocal)

¤· Satellite-based AS(SBAS)

ESA(2009): EGNOS, European Geostationary Navigation Overlay Service

 

¤· Ground-based AS(GBAS):

*Nnetwork real-time kinematic(RTK): VRS¿¡¼­ ÀÏÁ¤°Å¸®(15-30km) À̳»¿¡¼­ 1m ÀÌÇÏÀÇ ÃøÀ§Á¤È®µµ Á¦°ø. ´Ù¼öÀÇ VRS·Î ±¸¼ºµÈ ¸Á »ç¿ë.

*Virtual reference station(VRS)

*D-GPS

GeoBasis(2011): SAPOS, German augmentation system

 

¤· Galileo

- À¯·´¿¬ÇÕÀÇ ¹Î°£ÀÌ ¿î¿µÇÏ´Â GNSS

- GPS¿Í GLONASS¿¡ÀÇ ÀÇÁ¸¼º¿¡¼­ Å»ÇÇ

- ½ÅÈ£ ½ºÆåÆ®·³

http://www.gmat.unsw.edu.au/currentstudents/ug/projects/Meyers/galileo-frequency-spectrum.gif

- GPS ½ÅÈ£º¸´Ù versatility Áõ´ë

 

¤· QZSS

- µµ½É ºôµù½£¿¡¼­ÀÇ À§¼ºÃøÀ§°¡ °ï¶õÇÑ ¹®Á¦ ÇØ°áÇϱâ À§ÇØ Á¦¾È

- 3°³ ÀÌ»óÀÇ ÃøÀ§À§¼ºÀÌ inclined geo-synchronous circular orbit¿¡¼­ µ¿ÀÛ. ÁÖ±â 24½Ã°£. ±Ëµµ°íµµ 35,768km

- Geo-stationary vs geo-synchronous

- GPS, GLONASS ½ÅÈ£¿Í ȣȯ

- ¹æ¼Û°ú Åë½Å±â´É Ãß°¡: À§¼º°ú Áö»ó »ç¿ëÀÚ °£ÀÇ ¹æ¼Û/Åë½Å ä³Î Ãß°¡

- QZSS ¼­ºñ½º

* GPS L1, L2, L5 ½ÅÈ£ Àü¼Û

*ÃøÀ§¿ÀÂ÷ º¸Á¤µ¥ÀÌÅÍ(correction data) ¹æ¼Û

 

http://www.gmat.unsw.edu.au/currentstudents/ug/projects/Meyers/qzss.jpg

Gomi(2004): Quasi-zenith satellite system (QZSS) program overview