PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/12-11:57:40
G01     87.6           32.2                3.5 +/-    0.62       5.8 +/-    0.62  0.030 / 0.050
G07     127.4          41.3                5.7 +/-    1.15       8.2 +/-    1.15  0.050 / 0.050
G11     65.2           36.9                2.7 +/-    0.48       4.2 +/-    0.48  0.030 / 0.030
G13     294.5          35.2                4.3 +/-    1.16       6.8 +/-    1.16  0.030 / 0.030
G17     215.8          58.2                6.0 +/-    0.68       6.9 +/-    0.68  0.080 / 0.110
G19     215.4          30.7                5.0 +/-    1.35       8.7 +/-    1.35  0.070 / 0.100
G28     353.8          61.4                3.7 +/-    0.95       4.1 +/-    0.95  0.030 / 0.060
G30     106.2          76.0                4.9 +/-    0.61       5.0 +/-    0.61  0.040 / 0.060