PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-21:28:10
G02     199.2          12.4               16.7 +/-   15.44      44.2 +/-   15.44  0.090 / 0.130
G06     175.7          41.5               14.8 +/-    0.71      21.1 +/-    0.71  0.140 / 0.150
G13     233.1          19.5               16.9 +/-    2.37      37.8 +/-    2.37  0.090 / 0.140
G15     266.1          10.7               14.7 +/-    1.28      40.4 +/-    1.28  0.100 / 0.150
G17     10.9           66.7               13.8 +/-    1.08      14.8 +/-    1.08  0.110 / 0.420
G19     291.3          71.0               14.4 +/-    0.64      15.2 +/-    0.64  0.160 / 0.380
G24     314.3          23.6               12.7 +/-    1.37      25.6 +/-    1.37  0.030 / 0.030
G28     73.0           48.1               13.2 +/-    0.83      17.0 +/-    0.83  0.040 / 0.040
G30     155.1          21.6               14.3 +/-    2.86      30.3 +/-    2.86  0.100 / 0.320