PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-03:57:50
G02     85.7           11.6                4.2 +/-    2.79      11.4 +/-    2.79  0.050 / 0.110
G05     45.0           29.2                3.0 +/-    0.76       5.3 +/-    0.76  0.060 / 0.090
G13     95.0           33.4                7.3 +/-    0.72      11.9 +/-    0.72  0.130 / 0.240
G15     141.3          40.7                8.9 +/-    0.81      12.7 +/-    0.81  0.140 / 0.250
G20     235.9          24.9                7.9 +/-    0.83      15.5 +/-    0.83  0.050 / 0.110
G21     300.2          38.3                7.1 +/-    1.20      10.6 +/-    1.20  0.040 / 0.100
G25     207.0          23.9                5.7 +/-    1.11      11.5 +/-    1.11  0.060 / 0.120
G26     305.5          17.4                6.8 +/-    1.41      15.9 +/-    1.41  0.050 / 0.140
G29     102.9          84.0                6.8 +/-    0.56       6.9 +/-    0.56  0.030 / 0.030