PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-12:43:00
G01     126.4          12.2                4.8 +/-    4.89      12.7 +/-    4.89  0.030 / 0.050
G07     55.2           69.4                5.4 +/-    0.66       5.8 +/-    0.66  0.030 / 0.040
G08     49.4           38.0                4.6 +/-    0.52       7.0 +/-    0.52  0.130 / 0.430
G09     176.6          33.4                6.6 +/-    1.09      10.8 +/-    1.09  0.110 / 0.390
G11     116.5          35.8                5.1 +/-    1.14       8.0 +/-    1.14  0.030 / 0.060
G13     320.9          12.5                3.0 +/-    3.46       7.9 +/-    3.46  0.030 / 0.060
G17     199.8          16.0                4.1 +/-    2.29      10.0 +/-    2.29  0.070 / 0.130
G18     102.6          17.0                6.4 +/-    2.09      15.2 +/-    2.09  0.070 / 0.120
G28     277.3          53.2                4.5 +/-    1.53       5.5 +/-    1.53  0.030 / 0.040
G30     332.4          60.3                5.2 +/-    1.27       5.9 +/-    1.27  0.030 / 0.050