PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-17:57:50
G01     222.8          14.0               10.3 +/-    2.28      26.2 +/-    2.28  0.170 / 0.260
G03     269.5          71.0                8.8 +/-    0.58       9.2 +/-    0.58  0.110 / 0.250
G14     90.7           20.6                8.1 +/-    1.96      17.6 +/-    1.96  0.040 / 0.060
G16     147.7          47.1               10.7 +/-    0.95      14.0 +/-    0.95  0.040 / 0.040
G22     203.5          65.6                9.7 +/-    0.83      10.5 +/-    0.83  0.140 / 0.270
G23     309.7          39.2                8.1 +/-    1.16      12.0 +/-    1.16  0.190 / 0.380
G26     99.3           56.7                7.8 +/-    0.92       9.1 +/-    0.92  0.120 / 0.080
G31     46.1           31.7                6.8 +/-    0.94      11.4 +/-    0.94  0.100 / 0.080