【摘要】 通过介绍GPS系统时间和星期数之间的关系，说明“GPS星期数跳变的缘由在于GPS导航电文中的星期数只占10比特”，所以引发类似于2000年到来的“千年问题”那样的“跳变”（rollove）。GPS星期数的最大值为1023，所以在1999年8月21日夜／22日凌晨，星期数将由1023跳变为0。每个GPS用户应该检查自己的接收机在跳变出现时能否正常工作。如果用户设各的软件不完善的话，接收机自身可能把新的“0”星期数翻译为1980年1月6日。部分GPS接收机也因此而显示不正确的数据、不正确的定位结果、甚至停止跟踪卫星。GPS用户应该与设备生产厂商联系，确定自己的接收机是否会受星期数跳变的影响。值得一提的是，授时系统工程中往往会遇到时间（时刻）跳变之类的问题。更多还原

【Abstract】 The relation between GPS system time and weeknumber is introduced, and it is explained that the limited number of bits(10 bits) used in the GPS navigation message causes the problem of GPS weeknumber rollver which is similar to that the millennium problerm will occur when the year number becomes 00 from 99. The GPS weeknumber has the maximum of 1023 so that it will rollover from 1023 to 0 at the midnight of August 21～22,1999. The GPS users should check if the receivers can work correctly once the "rollover" occurs. If the equipments or softwares for the GPS receiver are not perfect. the receiver will interpret the new week 0 as January 6, 1980, and some receivers may display wrong information or wrong locating results. even stop tracking any satellite. The GPS users should contact the manufacturer of the GPS receiver to determine if the GPS receiver will be affected by the GPS weeknumber rollover. It should be noted that the problem of time rollover often occur for timing service.更多还原