PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/21-16:42:40
G02     235.6          71.4                9.1 +/-    0.42       9.6 +/-    0.42  0.160 / 0.220
G05     172.9          14.4               11.0 +/-    1.20      27.9 +/-    1.20  0.100 / 0.190
G06     41.4           57.6                8.3 +/-    0.41       9.6 +/-    0.41  0.080 / 0.090
G12     323.0          55.5                8.2 +/-    0.45       9.8 +/-    0.45  0.140 / 0.110
G17     70.4           21.8                7.5 +/-    1.60      15.7 +/-    1.60  0.180 / 0.330
G19     52.4           42.6                8.9 +/-    1.36      12.5 +/-    1.36  0.200 / 0.390
G24     244.7          35.5               10.9 +/-    2.06      17.1 +/-    2.06  0.040 / 0.040
G25     316.3          11.8                2.4 +/-   25.49       6.3 +/-   25.49  0.040 / 0.040