PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-16:28:00
G03     215.3          62.2               10.6 +/-    0.83      11.8 +/-    0.83  0.190 / 0.330
G07     252.2          10.8               -6.0 +/-   15.22     -16.4 +/-   15.22  0.130 / 0.330
G09     306.9          22.4                9.8 +/-    1.99      20.4 +/-    1.99  0.030 / 0.040
G14     104.2          12.6                9.4 +/-    2.01      24.8 +/-    2.01  0.040 / 0.060
G16     110.4          63.0               11.4 +/-    1.27      12.7 +/-    1.27  0.130 / 0.310
G22     187.2          45.6               10.9 +/-    0.59      14.5 +/-    0.59  0.090 / 0.090
G23     328.2          57.5                9.3 +/-    0.47      10.8 +/-    0.47  0.080 / 0.070
G26     58.8           46.6                9.1 +/-    0.86      12.0 +/-    0.86  0.030 / 0.030
G31     56.3           13.2                6.8 +/-    1.54      17.6 +/-    1.54  0.030 / 0.040