PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/22-17:12:20
G02     203.2          30.4               13.6 +/-    3.00      23.6 +/-    3.00  0.120 / 0.240
G06     158.3          67.8               11.7 +/-    1.05      12.5 +/-    1.05  0.090 / 0.210
G12     307.3          16.5                8.3 +/-    3.00      19.9 +/-    3.00  0.080 / 0.130
G17     33.9           50.9                8.0 +/-    0.42      10.0 +/-    0.42  0.070 / 0.110
G19     347.4          67.5                7.9 +/-    1.00       8.4 +/-    1.00  0.080 / 0.140
G24     299.4          37.8               10.1 +/-    1.04      15.3 +/-    1.04  0.070 / 0.130
G28     100.0          32.9                9.3 +/-    0.92      15.4 +/-    0.92  0.090 / 0.080