PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-03:12:40
G01     41.2           16.3                2.1 +/-    1.36       5.1 +/-    1.36  0.080 / 0.090
G06     176.9          37.4                5.3 +/-    1.67       8.0 +/-    1.67  0.070 / 0.090
G13     238.4          22.0                4.2 +/-    1.29       8.8 +/-    1.29  0.040 / 0.080
G15     270.0          12.4                4.2 +/-    1.32      11.0 +/-    1.32  0.050 / 0.070
G17     358.2          71.1                3.0 +/-    0.61       3.2 +/-    0.61  0.030 / 0.030
G19     279.2          69.5                2.8 +/-    0.87       3.0 +/-    0.87  0.030 / 0.030
G24     316.8          18.6                2.3 +/-    2.28       5.3 +/-    2.28  0.130 / 0.230
G28     72.6           46.3                3.0 +/-    0.95       3.9 +/-    0.95  0.140 / 0.240
G30     153.3          23.4                5.5 +/-    2.14      11.2 +/-    2.14  0.120 / 0.270