PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/17-19:12:50
G02     40.2           49.6                7.7 +/-    0.39       9.8 +/-    0.39  0.030 / 0.040
G05     115.4          68.8                8.1 +/-    0.61       8.6 +/-    0.61  0.030 / 0.040
G12     185.1          52.4               11.2 +/-    1.56      13.7 +/-    1.56  0.040 / 0.070
G25     276.6          58.6                8.5 +/-    0.94       9.8 +/-    0.94  0.030 / 0.080
G29     313.7          34.7                6.7 +/-    1.98      10.8 +/-    1.98  0.040 / 0.060