PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/19-18:58:00
G02     59.5           33.4                8.1 +/-    1.91      13.2 +/-    1.91  0.130 / 0.270
G05     56.1           60.4                9.7 +/-    0.75      11.0 +/-    0.75  0.130 / 0.290
G12     184.0          31.4               11.1 +/-    1.36      18.9 +/-    1.36  0.120 / 0.470
G13     125.3          16.1               11.3 +/-    1.34      27.4 +/-    1.34  0.170 / 0.350
G15     163.1          13.7               13.3 +/-    3.05      34.1 +/-    3.05  0.110 / 0.180
G21     272.8          17.5               13.2 +/-    0.98      30.9 +/-    0.98  0.100 / 0.170
G25     235.5          51.0               11.2 +/-    3.24      14.0 +/-    3.24  0.060 / 0.070
G29     330.0          56.1               10.2 +/-    0.69      12.0 +/-    0.69  0.070 / 0.090