PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-02:42:10
G02     44.9           45.0                6.8 +/-    0.56       9.1 +/-    0.56  0.070 / 0.070
G05     103.4          68.7                8.7 +/-    0.41       9.3 +/-    0.41  0.050 / 0.040
G12     190.1          54.0               11.8 +/-    1.26      14.2 +/-    1.26  0.030 / 0.040
G25     275.6          57.8               10.3 +/-    0.84      12.0 +/-    0.84  0.030 / 0.030
G29     315.5          37.0                8.7 +/-    0.88      13.3 +/-    0.88  0.040 / 0.050