PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/28-23:27:30
G02     231.5          72.6                9.9 +/-    0.61      10.3 +/-    0.61  0.060 / 0.090
G05     172.7          12.7               14.3 +/-    2.31      37.5 +/-    2.31  0.060 / 0.100
G06     42.2           66.0                8.4 +/-    0.28       9.1 +/-    0.28  0.050 / 0.070
G12     320.3          44.4                8.5 +/-    2.47      11.5 +/-    2.47  0.080 / 0.070
G17     67.0           24.6                9.8 +/-    0.57      19.3 +/-    0.57  0.040 / 0.030
G19     52.2           41.2                9.1 +/-    0.89      13.0 +/-    0.89  0.040 / 0.040
G24     249.1          37.1               12.2 +/-    1.00      18.7 +/-    1.00  0.090 / 0.220