PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/11-19:57:10
G02     48.3           42.8                9.9 +/-    0.67      13.8 +/-    0.67  0.030 / 0.040
G05     85.6           69.0                9.1 +/-    0.49       9.7 +/-    0.49  0.030 / 0.040
G12     183.5          42.4               11.6 +/-    2.16      16.3 +/-    2.16  0.060 / 0.090
G25     257.1          58.1               11.4 +/-    0.78      13.2 +/-    0.78  0.070 / 0.070
G29     319.7          42.3               10.4 +/-    1.42      14.6 +/-    1.42  0.040 / 0.060