PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/27-00:57:50
G02     44.8           45.2                9.1 +/-    0.67      12.3 +/-    0.67  0.060 / 0.060
G05     102.3          68.9               11.8 +/-    0.42      12.6 +/-    0.42  0.040 / 0.070
G12     188.7          52.6               13.6 +/-    1.20      16.6 +/-    1.20  0.030 / 0.040
G25     273.9          58.1               13.1 +/-    1.21      15.1 +/-    1.21  0.030 / 0.040
G29     315.7          37.1               12.4 +/-    1.21      18.9 +/-    1.21  0.040 / 0.070