PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/17-13:58:00
G01     115.1          20.7                8.9 +/-    1.30      19.2 +/-    1.30  0.030 / 0.040
G07     91.1           64.1                7.3 +/-    0.76       8.1 +/-    0.76  0.030 / 0.030
G08     43.3           27.1                6.4 +/-    1.25      11.9 +/-    1.25  0.040 / 0.080
G09     175.3          20.2                7.6 +/-    2.09      16.6 +/-    2.09  0.040 / 0.090
G11     100.1          41.4                9.0 +/-    1.21      12.7 +/-    1.21  0.030 / 0.040
G13     315.3          23.0                5.7 +/-    1.44      11.6 +/-    1.44  0.040 / 0.050
G17     202.8          29.1                9.0 +/-    1.97      16.1 +/-    1.97  0.110 / 0.150
G18     89.3           22.3                6.9 +/-    0.97      14.4 +/-    0.97  0.120 / 0.160
G28     300.9          58.9                6.7 +/-    0.84       7.7 +/-    0.84  0.110 / 0.220
G30     353.3          71.8                7.1 +/-    0.83       7.4 +/-    0.83  0.100 / 0.230