PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/11/12-09:57:50
G02     199.7          19.4                4.4 +/-    1.55       9.9 +/-    1.55  0.040 / 0.070
G06     175.5          48.7                8.9 +/-    0.85      11.4 +/-    0.85  0.040 / 0.070
G13     230.2          14.7                5.3 +/-    2.01      13.2 +/-    2.01  0.080 / 0.130
G17     21.9           60.2                4.9 +/-    0.69       5.5 +/-    0.69  0.090 / 0.090
G19     321.3          71.7                4.5 +/-    0.68       4.7 +/-    0.68  0.040 / 0.040
G24     312.4          26.7                3.4 +/-    1.22       6.4 +/-    1.22  0.030 / 0.030
G28     86.2           40.4                5.9 +/-    1.06       8.6 +/-    1.06  0.060 / 0.040
G30     156.7          16.4                6.9 +/-    1.01      16.7 +/-    1.01  0.040 / 0.040