PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-14:58:10
G03     223.4          65.4               11.2 +/-    1.22      12.2 +/-    1.22  0.140 / 0.330
G09     305.2          20.2                9.2 +/-    1.57      20.1 +/-    1.57  0.080 / 0.270
G14     101.4          15.4                9.2 +/-    1.71      22.6 +/-    1.71  0.050 / 0.060
G16     116.8          61.5               12.8 +/-    1.28      14.3 +/-    1.28  0.040 / 0.070
G22     187.0          48.0               11.8 +/-    1.82      15.3 +/-    1.82  0.030 / 0.070
G23     326.4          55.9                9.6 +/-    0.57      11.3 +/-    0.57  0.030 / 0.060
G26     62.3           48.4                9.1 +/-    0.50      11.8 +/-    0.50  0.060 / 0.040
G31     54.6           15.3                8.0 +/-    1.73      19.7 +/-    1.73  0.050 / 0.040