PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/18-19:27:50
G03     213.7          60.8               14.3 +/-    0.96      16.1 +/-    0.96  0.050 / 0.070
G07     253.5          12.1               11.7 +/-    2.27      31.3 +/-    2.27  0.050 / 0.060
G09     307.8          23.5               11.3 +/-    1.13      22.8 +/-    1.13  0.030 / 0.050
G14     106.0          10.1               12.3 +/-    1.29      34.3 +/-    1.29  0.030 / 0.040
G16     109.2          64.0               15.5 +/-    0.72      17.0 +/-    0.72  0.080 / 0.120
G22     188.8          45.5               15.0 +/-    1.64      20.0 +/-    1.64  0.160 / 0.150
G23     327.6          57.3               12.1 +/-    0.50      14.0 +/-    0.50  0.120 / 0.430
G26     57.6           46.2               10.1 +/-    0.69      13.4 +/-    0.69  0.170 / 0.510
G31     57.0           12.9                8.7 +/-    0.64      22.7 +/-    0.64  0.030 / 0.030