PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-07:12:30
G10     293.1          50.9                4.5 +/-    2.69       5.6 +/-    2.69  0.040 / 0.030
G15     46.6           30.1                3.2 +/-    1.20       5.6 +/-    1.20  0.050 / 0.040
G20     344.2          65.3                3.2 +/-    0.99       3.4 +/-    0.99  0.100 / 0.090
G21     87.7           74.4                4.8 +/-    0.40       4.9 +/-    0.40  0.140 / 0.080
G24     100.4          25.0                5.8 +/-    1.21      11.3 +/-    1.21  0.160 / 0.170
G27     305.7          31.5                4.3 +/-    1.03       7.4 +/-    1.03  0.110 / 0.170
G32     209.9          23.7                6.4 +/-    1.79      12.8 +/-    1.79  0.100 / 0.100