1[1]Carl McCullough. US Satellite Navigation Program Status. Journal of Navigation RION,1999,52(3): 303～316 被引量：1
2[2]Keith McDonald. Opportunity Knocks, Will GPS Modernization Open Doors? GPS World,1999, (9):36～46 被引量：1
3[3]Jules McNeff. Leadership in Satellite Navigation and Timing, Past Success-Future Challenge (Part 1/Part 2). GPS Word, 1999,(10)/(11): 48～52/32～38 被引量：1
4[4]Dee. Ann. Divis. Ga]ieo, Enthusiasm and Money Propel Europe's GNSS. GPS Word, 1999,(11):10～19 被引量：1
5[5]Glen Gibbons: Galieo; Win-Win? GPS Word Nov 1999 P. 4 被引量：1
6[6]Global Policy. Making Waves. Air Traffic Management, Nov-Dec 1999:18 - 21 被引量：1
