PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-00:27:40
G02     234.2          73.8                9.4 +/-    0.57       9.8 +/-    0.57  0.070 / 0.110
G05     172.2          13.7               11.7 +/-    2.34      30.1 +/-    2.34  0.070 / 0.080
G06     41.4           65.5                7.9 +/-    0.54       8.6 +/-    0.54  0.050 / 0.070
G12     320.5          45.6                8.6 +/-    0.52      11.5 +/-    0.52  0.050 / 0.070
G17     68.2           23.5                8.4 +/-    1.05      17.1 +/-    1.05  0.040 / 0.050
G19     53.3           40.6                8.4 +/-    1.39      12.1 +/-    1.39  0.040 / 0.050
G24     247.3          36.5               10.2 +/-    1.85      15.8 +/-    1.85  0.180 / 0.220