PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/07-19:57:50
G02     251.0          77.3                9.9 +/-    0.51      10.1 +/-    0.51  0.030 / 0.050
G05     170.3          19.3               13.4 +/-    1.10      30.1 +/-    1.10  0.040 / 0.050
G06     40.4           53.3                9.4 +/-    0.42      11.4 +/-    0.42  0.110 / 0.150
G12     322.1          58.4                9.7 +/-    0.47      11.2 +/-    0.47  0.140 / 0.150
G17     73.5           20.8                9.3 +/-    1.43      20.2 +/-    1.43  0.040 / 0.040
G19     58.5           38.7                9.5 +/-    1.04      14.1 +/-    1.04  0.050 / 0.040
G24     240.5          32.7               12.5 +/-    2.06      20.8 +/-    2.06  0.160 / 0.350
G25     317.2          15.3                7.2 +/-    3.01      17.7 +/-    3.01  0.200 / 0.230