PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/29-02:27:30
G02     36.3           52.8                7.3 +/-    0.66       9.0 +/-    0.66  0.040 / 0.040
G05     131.5          64.2               11.4 +/-    0.64      12.5 +/-    0.64  0.040 / 0.040
G06     55.0           14.1                4.5 +/-    1.69      11.5 +/-    1.69  0.030 / 0.040
G12     197.0          65.7                9.8 +/-    1.14      10.6 +/-    1.14  0.030 / 0.040
G25     294.8          54.0                8.8 +/-    0.70      10.7 +/-    0.70  0.040 / 0.060
G29     308.5          29.0                6.3 +/-    2.34      11.3 +/-    2.34  0.060 / 0.050