PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-19:27:30
G01     223.6          14.2                8.8 +/-    5.43      22.3 +/-    5.43  0.040 / 0.030
G03     269.2          70.9                8.7 +/-    0.56       9.1 +/-    0.56  0.030 / 0.030
G14     89.8           22.7                8.4 +/-    2.27      17.3 +/-    2.27  0.060 / 0.140
G16     144.6          48.6               10.6 +/-    0.66      13.5 +/-    0.66  0.060 / 0.150
G22     205.7          66.8               11.0 +/-    0.86      11.8 +/-    0.86  0.030 / 0.060
G23     311.0          41.0                8.6 +/-    1.24      12.3 +/-    1.24  0.030 / 0.060
G26     89.5           54.5                8.7 +/-    1.77      10.4 +/-    1.77  0.110 / 0.200
G31     46.8           28.6                7.4 +/-    1.42      13.3 +/-    1.42  0.130 / 0.220