PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/17-06:28:10
G02     206.7          48.5                7.1 +/-    1.42       9.1 +/-    1.42  0.060 / 0.250
G06     146.1          78.1                5.2 +/-    0.95       5.3 +/-    0.95  0.070 / 0.250
G12     313.0          23.0                2.6 +/-    2.18       5.3 +/-    2.18  0.040 / 0.050
G17     46.3           41.2                4.5 +/-    0.39       6.5 +/-    0.39  0.040 / 0.050
G19     23.5           57.3                3.8 +/-    0.51       4.4 +/-    0.51  0.050 / 0.080
G24     285.2          41.4                3.5 +/-    1.16       5.0 +/-    1.16  0.040 / 0.070
G28     113.2          22.6                4.8 +/-    1.23      10.0 +/-    1.23  0.070 / 0.110