PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/31-12:27:40
G01     127.4          11.4                5.6 +/-    2.04      15.2 +/-    2.04  0.030 / 0.040
G07     51.5           69.6                4.2 +/-    0.39       4.5 +/-    0.39  0.030 / 0.030
G08     50.1           38.8                3.8 +/-    0.89       5.7 +/-    0.89  0.030 / 0.030
G09     176.6          34.6                5.5 +/-    0.99       8.7 +/-    0.99  0.030 / 0.030
G11     117.7          35.1                5.4 +/-    0.82       8.6 +/-    0.82  0.290 / 0.390
G13     321.2          11.5               -2.6 +/-   11.36      -7.1 +/-   11.36  0.340 / 0.380
G17     199.6          15.0                2.2 +/-    3.59       5.6 +/-    3.59  0.310 / 0.260
G18     103.7          16.4                4.0 +/-    2.12       9.7 +/-    2.12  0.200 / 0.320
G28     275.3          52.6                4.6 +/-    3.44       5.7 +/-    3.44  0.130 / 0.230
G30     330.9          59.2                2.9 +/-    0.56       3.3 +/-    0.56  0.120 / 0.200