PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/19-17:27:50
G01     251.5          35.4               11.4 +/-    1.81      17.9 +/-    1.81  0.030 / 0.040
G03     315.8          46.9                9.2 +/-    0.89      12.0 +/-    0.89  0.030 / 0.030
G11     240.1          12.9                9.1 +/-    1.76      23.9 +/-    1.76  0.040 / 0.040
G14     58.9           42.2                7.9 +/-    1.00      11.1 +/-    1.00  0.040 / 0.040
G22     303.9          67.6                8.9 +/-    0.50       9.5 +/-    0.50  0.130 / 0.360
G23     287.1          20.5                8.1 +/-    1.95      17.6 +/-    1.95  0.120 / 0.240
G25     40.4           10.7                7.6 +/-    1.73      21.0 +/-    1.73  0.050 / 0.080
G26     135.8          38.1               12.9 +/-    1.07      19.4 +/-    1.07  0.050 / 0.080
G31     41.0           57.9                8.6 +/-    0.53       9.9 +/-    0.53  0.150 / 0.280
G32     77.6           22.3                8.5 +/-    1.52      17.7 +/-    1.52  0.160 / 0.240