PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-21:42:50
G02     43.9           46.2                9.2 +/-    0.54      12.2 +/-    0.54  0.030 / 0.040
G05     103.3          69.3               11.2 +/-    0.39      11.8 +/-    0.39  0.040 / 0.030
G12     186.1          50.2               13.0 +/-    2.61      16.3 +/-    2.61  0.030 / 0.060
G25     271.1          58.5               12.8 +/-    0.71      14.8 +/-    0.71  0.040 / 0.060
G29     315.9          37.3               11.0 +/-    1.52      16.7 +/-    1.52  0.050 / 0.070