PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-02:28:00
G02     58.4           33.1                5.5 +/-    2.39       9.0 +/-    2.39  0.060 / 0.080
G05     59.6           61.4                8.3 +/-    0.66       9.3 +/-    0.66  0.070 / 0.090
G12     186.7          37.0                8.6 +/-    0.76      13.1 +/-    0.76  0.250 / 0.390
G13     128.6          13.7                9.8 +/-    1.90      25.1 +/-    1.90  0.230 / 0.260
G15     163.8          11.5                7.7 +/-   11.67      20.8 +/-   11.67  0.070 / 0.070
G21     270.6          17.2                7.7 +/-    1.50      18.2 +/-    1.50  0.100 / 0.060
G25     238.5          53.3                9.7 +/-    5.11      11.7 +/-    5.11  0.190 / 0.300
G29     330.9          56.4                8.5 +/-    0.54      10.0 +/-    0.54  0.200 / 0.330