<table style="width: 591px; height: 296px" border="1" cellspacing="0" cellpadding="1" width="591"> <tbody> <tr> <td valign="top" width="98">比特位</td> <td valign="top" width="168">值</td> <td valign="top" width="283">含义</td></tr> <tr> <td valign="top" width="98">0</td> <td valign="top" width="168"> </td> <td valign="top" width="283">闰秒已知(Leap Second Known)</td></tr> <tr> <td valign="top" width="98">1</td> <td valign="top" width="168"> </td> <td valign="top" width="283">时钟源故障(Clock Failure)</td></tr> <tr> <td valign="top" width="98">2</td> <td valign="top" width="168"> </td> <td valign="top" width="283">时钟未同步(Clock Not Synchronized)</td></tr> <tr> <td valign="top" rowspan="8" width="98">3 ~ 7</td> <td valign="top" width="283" colspan="2">秒的小数部分的时间精度</td></tr> <tr> <td valign="top" width="283">000000</td> <td valign="top">n = 0，精度为 1 / 2^0 = 1s</td></tr> <tr> <td valign="top" width="283">000001</td> <td valign="top">n = 1，精度为 1 / 2^1 = 0.5s</td></tr> <tr> <td valign="top" width="283">000010</td> <td valign="top">n = 2，精度为 1 / 2^2 = 0.25s</td></tr> <tr> <td valign="top" width="283">000011</td> <td valign="top">n = 3，精度为 1 / 2^3 = 0.125s</td></tr> <tr> <td valign="top" width="283">000100 ~ 11000</td> <td valign="top">精度为1/2^n s，n由左侧的二进制值换算得到</td></tr> <tr> <td valign="top" width="283">11000 ~ 11110</td> <td valign="top">无效</td></tr> <tr> <td valign="top" width="283">11111</td> <td valign="top">未定义 </td></tr></tbody></table>