PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/15-15:58:00
G02     345.3          76.4                6.1 +/-    0.32       6.3 +/-    0.32  0.240 / 0.220
G05     164.4          37.5                8.3 +/-    0.80      12.7 +/-    0.80  0.180 / 0.250
G06     43.5           33.9                6.2 +/-    1.18      10.0 +/-    1.18  0.030 / 0.020
G12     289.0          79.7                7.2 +/-    0.59       7.3 +/-    0.59  0.030 / 0.020
G19     77.8           27.8                6.1 +/-    1.38      11.2 +/-    1.38  0.040 / 0.070
G24     221.7          17.9                9.8 +/-    1.81      22.6 +/-    1.81  0.040 / 0.070
G25     315.4          36.2                8.1 +/-    0.73      12.5 +/-    0.73  0.070 / 0.100
G29     290.0          11.5                2.2 +/-   19.05       6.1 +/-   19.05  0.060 / 0.080