PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/17-17:42:50
G02     220.1          62.7                8.5 +/-    1.30       9.4 +/-    1.30  0.070 / 0.110
G06     50.1           70.8                8.0 +/-    0.52       8.4 +/-    0.52  0.060 / 0.100
G12     318.8          38.1                6.3 +/-    1.76       9.5 +/-    1.76  0.120 / 0.330
G17     58.4           32.2                6.0 +/-    2.59      10.0 +/-    2.59  0.130 / 0.390
G19     44.6           45.5                8.8 +/-    1.43      11.7 +/-    1.43  0.050 / 0.080
G24     260.7          40.2                9.5 +/-    3.66      13.8 +/-    3.66  0.060 / 0.070
G28     123.5          16.1                7.9 +/-    2.12      19.2 +/-    2.12  0.050 / 0.100