PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-22:12:30
G02     55.0           36.9                8.8 +/-    0.67      13.5 +/-    0.67  0.030 / 0.040
G05     65.9           64.6                9.0 +/-    0.45       9.8 +/-    0.45  0.030 / 0.040
G12     183.4          35.5               12.3 +/-    2.09      19.4 +/-    2.09  0.040 / 0.080
G13     131.7          12.0               13.2 +/-    2.60      35.2 +/-    2.60  0.030 / 0.090
G21     267.2          13.5               11.8 +/-    3.83      30.4 +/-    3.83  0.050 / 0.090
G25     244.1          54.9               11.1 +/-    0.84      13.3 +/-    0.84  0.050 / 0.090
G29     324.4          48.9               11.4 +/-    1.63      14.5 +/-    1.63  0.180 / 0.320