PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-13:27:40
G01     126.4          12.2                7.8 +/-    2.74      20.8 +/-    2.74  0.030 / 0.040
G07     55.0           69.5                6.4 +/-    0.79       6.8 +/-    0.79  0.030 / 0.040
G08     49.6           38.5                6.5 +/-    0.74       9.8 +/-    0.74  0.030 / 0.030
G09     176.8          33.7                6.6 +/-    1.63      10.7 +/-    1.63  0.030 / 0.030
G11     116.8          35.8                8.4 +/-    0.36      13.1 +/-    0.36  0.090 / 0.310
G13     320.9          12.4                5.1 +/-    3.56      13.6 +/-    3.56  0.130 / 0.370
G17     200.0          15.6                7.8 +/-    1.28      19.2 +/-    1.28  0.130 / 0.200
G18     102.8          17.0                6.7 +/-    2.10      16.0 +/-    2.10  0.110 / 0.200
G28     277.3          53.2                6.5 +/-    3.73       7.9 +/-    3.73  0.240 / 0.310
G30     332.8          60.5                5.4 +/-    0.85       6.1 +/-    0.85  0.210 / 0.370