PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-18:27:50
G01     232.7          22.9               13.2 +/-    1.86      27.2 +/-    1.86  0.030 / 0.030
G03     300.1          64.7               10.6 +/-    0.70      11.6 +/-    0.70  0.030 / 0.020
G14     78.6           30.4               10.7 +/-    1.50      18.6 +/-    1.50  0.050 / 0.120
G16     153.7          36.6               14.2 +/-    1.19      21.9 +/-    1.19  0.070 / 0.060
G22     238.3          75.5               11.3 +/-    0.55      11.6 +/-    0.55  0.120 / 0.130
G23     301.9          32.8                8.6 +/-    1.76      14.3 +/-    1.76  0.100 / 0.140
G26     111.3          51.5               11.7 +/-    1.05      14.5 +/-    1.05  0.060 / 0.090
G31     42.6           39.0                8.9 +/-    1.47      13.1 +/-    1.47  0.070 / 0.070
G32     93.4           10.5               14.3 +/-    1.64      39.4 +/-    1.64  0.040 / 0.040