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               10.3 +/-    0.48      10.5 +/-    0.48  0.070 / 0.240
G05     170.3          19.3               14.0 +/-    1.43      31.3 +/-    1.43  0.060 / 0.250
G06     40.4           53.3                9.8 +/-    0.58      11.9 +/-    0.58  0.030 / 0.050
G12     322.1          58.4                9.1 +/-    0.67      10.5 +/-    0.67  0.040 / 0.060
G17     73.5           20.8                8.9 +/-    0.91      19.2 +/-    0.91  0.030 / 0.040
G19     58.5           38.7                8.6 +/-    1.03      12.7 +/-    1.03  0.040 / 0.040
G24     240.5          32.7               14.0 +/-    1.14      23.3 +/-    1.14  0.080 / 0.130
G25     317.2          15.3                7.9 +/-    1.92      19.4 +/-    1.92  0.070 / 0.130