PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-00:12:40
G01     112.9          22.2               10.5 +/-    1.18      21.9 +/-    1.18  0.060 / 0.060
G07     95.9           62.7                9.1 +/-    0.47      10.1 +/-    0.47  0.050 / 0.060
G08     43.3           27.6                7.7 +/-    1.54      14.2 +/-    1.54  0.060 / 0.110
G09     176.7          20.1               10.1 +/-    1.62      22.1 +/-    1.62  0.040 / 0.110
G11     101.2          42.3               10.0 +/-    0.85      14.0 +/-    0.85  0.050 / 0.090
G13     314.3          23.9                6.3 +/-    2.13      12.5 +/-    2.13  0.070 / 0.100
G17     204.2          30.2               11.0 +/-    1.29      19.3 +/-    1.29  0.120 / 0.210
G28     307.2          59.9                8.6 +/-    0.82       9.8 +/-    0.82  0.110 / 0.240
G30     19.3           75.8                9.3 +/-    1.25       9.5 +/-    1.25  0.040 / 0.080