PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-13:57:50
G02     210.7          45.9                8.3 +/-    2.16      11.1 +/-    2.16  0.050 / 0.100
G06     97.0           79.0                8.3 +/-    0.57       8.5 +/-    0.57  0.070 / 0.110
G12     315.8          30.4                7.0 +/-    1.71      12.1 +/-    1.71  0.100 / 0.100
G17     50.2           37.3                6.2 +/-    0.36       9.4 +/-    0.36  0.070 / 0.100
G19     19.3           58.8                8.1 +/-    0.41       9.3 +/-    0.41  0.030 / 0.040
G24     275.7          43.4                5.9 +/-    1.25       8.2 +/-    1.25  0.030 / 0.020
G28     115.2          21.7                8.5 +/-    1.59      17.9 +/-    1.59  0.050 / 0.040