PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-04:12:40
G02     202.4          36.6                4.9 +/-    1.17       7.6 +/-    1.17  0.070 / 0.090
G06     165.6          67.4                4.1 +/-    0.28       4.4 +/-    0.28  0.060 / 0.120
G12     307.3          14.0                2.0 +/-    2.72       5.0 +/-    2.72  0.040 / 0.050
G17     34.8           50.3                3.0 +/-    0.84       3.8 +/-    0.84  0.040 / 0.050
G19     2.5            65.0                2.1 +/-    0.44       2.3 +/-    0.44  0.040 / 0.020
G24     298.8          37.5                1.9 +/-    3.19       2.8 +/-    3.19  0.040 / 0.030
G28     102.9          30.6                3.9 +/-    0.84       6.8 +/-    0.84  0.130 / 0.180