PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-20:28:00
G02     328.5          79.9                9.3 +/-    0.78       9.4 +/-    0.78  0.060 / 0.110
G05     164.8          32.0               13.4 +/-    1.61      22.5 +/-    1.61  0.060 / 0.110
G06     41.6           40.2                7.7 +/-    0.82      11.2 +/-    0.82  0.030 / 0.040
G12     312.8          72.6                9.8 +/-    0.60      10.2 +/-    0.60  0.030 / 0.040
G17     84.6           12.9                9.6 +/-    2.03      25.0 +/-    2.03  0.040 / 0.050
G19     71.9           30.5               10.0 +/-    0.80      17.4 +/-    0.80  0.030 / 0.040
G24     228.6          23.6               12.9 +/-    3.29      26.1 +/-    3.29  0.090 / 0.230
G25     317.4          27.4                6.8 +/-    1.20      12.7 +/-    1.20  0.100 / 0.230