PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/21-01:28:20
G02     20.8           64.8                6.3 +/-    0.39       6.9 +/-    0.39  0.050 / 0.090
G05     152.9          50.7               12.7 +/-    1.45      15.8 +/-    1.45  0.050 / 0.080
G06     46.2           28.6                5.3 +/-    0.56       9.6 +/-    0.56  0.140 / 0.270
G12     253.8          78.8                8.4 +/-    0.89       8.5 +/-    0.89  0.170 / 0.350
G19     89.3           17.0               10.1 +/-    1.42      24.0 +/-    1.42  0.030 / 0.030
G24     215.7          11.1               11.7 +/-    1.42      31.9 +/-    1.42  0.030 / 0.030
G25     310.1          44.4                6.7 +/-    2.10       9.1 +/-    2.10  0.030 / 0.050
G29     299.9          22.7                8.7 +/-    1.62      18.0 +/-    1.62  0.030 / 0.050