PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/19-00:27:50
G02     88.6604        11.6458         10.9555 +/-  1.5043   29.4855 +/-  1.5043  0.090 / 0.230
G05     45.7931        27.8410          7.9842 +/-  0.7324   14.6401 +/-  0.7324  0.090 / 0.170
G13     90.3033        36.4312         11.8770 +/-  0.9101   18.3631 +/-  0.9101  0.080 / 0.100
G15     140.9486       43.6944         14.4618 +/-  1.0182   19.8601 +/-  1.0182  0.060 / 0.100
G18     236.6612       32.5411         12.1910 +/-  1.9561   20.2781 +/-  1.9561  0.050 / 0.090
G20     20.2047        74.7462         11.5543 +/-  0.7523   11.9313 +/-  0.7523  0.100 / 0.120
G21     303.3600       40.5377          9.6920 +/-  0.8123   13.9743 +/-  0.8123  0.140 / 0.350
G25     200.9550       16.3395         14.3231 +/-  1.9796   34.4804 +/-  1.9796  0.150 / 0.400
G26     298.8650       19.6632          9.3215 +/-  1.6277   20.6797 +/-  1.6277  0.140 / 0.230
G29     140.5957       81.7198         10.5807 +/-  0.9942   10.6807 +/-  0.9942  0.120 / 0.200