PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-01:58:00
G01     44.6           20.7                2.5 +/-    1.04       5.4 +/-    1.04  0.040 / 0.070
G06     177.5          31.5                6.7 +/-    2.63      11.4 +/-    2.63  0.040 / 0.070
G11     44.1           11.4                3.0 +/-    2.16       8.2 +/-    2.16  0.030 / 0.030
G13     243.8          25.9                7.2 +/-    2.47      13.7 +/-    2.47  0.020 / 0.030
G15     275.7          14.3                5.5 +/-    1.01      14.0 +/-    1.01  0.050 / 0.110
G17     338.0          75.4                5.5 +/-    0.75       5.6 +/-    0.75  0.070 / 0.110
G19     262.2          65.9                4.7 +/-    0.69       5.1 +/-    0.69  0.070 / 0.130
G24     318.3          13.7                4.1 +/-    1.88      10.5 +/-    1.88  0.060 / 0.140
G28     64.3           49.2                4.3 +/-    0.35       5.5 +/-    0.35  0.130 / 0.430
G30     151.7          30.0                6.7 +/-    1.17      11.7 +/-    1.17  0.140 / 0.490