PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-13:57:50
G01     224.5          16.0                6.3 +/-   12.76      15.3 +/-   12.76  0.280 / 0.320
G03     271.0          72.4                8.4 +/-    0.25       8.8 +/-    0.25  0.300 / 0.270
G14     88.0           22.6                6.9 +/-    2.04      14.3 +/-    2.04  0.030 / 0.030
G16     150.1          44.0                9.6 +/-    0.51      13.1 +/-    0.51  0.030 / 0.030
G22     199.7          66.4               13.6 +/-    0.31      14.7 +/-    0.31  0.110 / 0.160
G23     308.4          38.4                6.5 +/-    0.86       9.6 +/-    0.86  0.120 / 0.210
G26     99.7           55.3                7.8 +/-    1.19       9.2 +/-    1.19  0.040 / 0.030
G31     45.7           31.7                6.4 +/-    1.50      10.8 +/-    1.50  0.040 / 0.030