PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-12:27:50
G01     252.5          36.8                4.9 +/-    2.14       7.5 +/-    2.14  0.070 / 0.100
G03     316.5          47.4                4.1 +/-    0.94       5.3 +/-    0.94  0.060 / 0.090
G11     238.0          12.5                2.9 +/-    3.00       7.7 +/-    3.00  0.040 / 0.090
G14     58.4           41.5                5.1 +/-    1.04       7.2 +/-    1.04  0.060 / 0.090
G18     219.9          28.2                5.6 +/-    2.03      10.1 +/-    2.03  0.090 / 0.120
G22     303.9          69.4                5.7 +/-    0.66       6.0 +/-    0.66  0.080 / 0.130
G25     41.0           10.5                3.9 +/-    3.80      10.7 +/-    3.80  0.060 / 0.100
G26     141.3          35.3                7.4 +/-    1.23      11.6 +/-    1.23  0.060 / 0.090
G31     42.1           61.4                5.3 +/-    0.92       6.0 +/-    0.92  0.040 / 0.040
G32     72.9           28.4                5.7 +/-    2.15      10.3 +/-    2.15  0.040 / 0.040