PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-20:57:30
G02     23.0           63.1               11.1 +/-    1.77      12.3 +/-    1.77  0.050 / 0.040
G05     150.1          54.7               13.5 +/-    1.18      16.2 +/-    1.18  0.060 / 0.050
G06     50.0           20.7                7.2 +/-    0.86      15.6 +/-    0.86  0.040 / 0.030
G12     205.0          74.8                9.4 +/-    1.45       9.7 +/-    1.45  0.030 / 0.030
G19     92.3           17.1               11.6 +/-    2.13      27.4 +/-    2.13  0.060 / 0.070
G25     306.8          47.7               10.3 +/-    1.18      13.4 +/-    1.18  0.050 / 0.070
G29     300.9          20.9               11.2 +/-    1.94      24.0 +/-    1.94  0.040 / 0.050