PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/06-01:57:30
G02     35.6           53.4               14.1 +/-    0.86      17.1 +/-    0.86  0.030 / 0.040
G05     132.8          63.7               16.7 +/-    0.42      18.4 +/-    0.42  0.030 / 0.040
G06     54.8           14.4               12.5 +/-    2.11      31.5 +/-    2.11  0.040 / 0.050
G12     197.2          66.2               13.7 +/-    1.02      14.8 +/-    1.02  0.030 / 0.040
G25     295.7          53.7               14.0 +/-    0.85      16.9 +/-    0.85  0.040 / 0.060
G29     308.0          28.4               10.0 +/-    1.44      18.1 +/-    1.44  0.050 / 0.060