PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/19-17:27:40
G02     203.5          31.8               13.2 +/-    1.62      22.4 +/-    1.62  0.070 / 0.170
G06     156.6          69.0               12.2 +/-    1.25      13.0 +/-    1.25  0.090 / 0.150
G12     307.9          17.4               10.1 +/-    2.24      23.6 +/-    2.24  0.080 / 0.090
G17     34.9           50.1               10.1 +/-    0.96      12.7 +/-    0.96  0.070 / 0.080
G19     350.8          67.0               10.1 +/-    0.91      10.9 +/-    0.91  0.060 / 0.150
G24     298.1          38.4               11.6 +/-    0.96      17.3 +/-    0.96  0.060 / 0.120
G28     101.2          32.1               11.4 +/-    1.28      19.1 +/-    1.28  0.070 / 0.110