PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/18-07:42:30
G02     200.1          25.6                6.7 +/-    2.47      12.9 +/-    2.47  0.100 / 0.080
G06     176.3          53.1                8.2 +/-    0.60      10.0 +/-    0.60  0.090 / 0.090
G13     225.9          11.0                4.7 +/-    3.19      12.9 +/-    3.19  0.030 / 0.030
G17     26.7           56.5                3.6 +/-    0.96       4.2 +/-    0.96  0.030 / 0.030
G19     338.2          70.1                3.6 +/-    0.56       3.8 +/-    0.56  0.040 / 0.040
G24     308.6          30.9                5.0 +/-    0.70       8.6 +/-    0.70  0.040 / 0.040
G28     92.4           37.1                6.5 +/-    1.60      10.0 +/-    1.60  0.170 / 0.570
G30     156.9          10.1                6.2 +/-    2.22      17.4 +/-    2.22  0.180 / 0.410