1. 1) Homepage of Korean Airport Company, http://www.cnsatm.co.kr
2. 2) ICAO: International Standards and Recommended Practices, ANNEX 10, vol. 1 (Radio Navigation Aids), 1999–2001.
3. 3) Homepage of Federal Aviation Administration of United States, http://gps.faa.gov
4. 4) FAA: Performance Type 1 LAAS Ground Facility, FAA-E-2937, Sep. 21, 1999.
5. 5) RTCA: Minimum Aviation System Performance Standards for the LAAS, RTCA/DO-245, 1998.