PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-02:27:40
G02     39.4           50.0                7.7 +/-    0.69       9.8 +/-    0.69  0.040 / 0.020
G05     122.9          66.5               10.5 +/-    0.93      11.3 +/-    0.93  0.030 / 0.020
G06     57.1           11.4                7.0 +/-    1.25      19.0 +/-    1.25  0.030 / 0.020
G12     193.7          61.5               10.7 +/-    0.84      12.0 +/-    0.84  0.030 / 0.020
G25     288.7          55.8                9.1 +/-    0.64      10.7 +/-    0.64  0.040 / 0.020
G29     311.0          31.7                7.7 +/-    1.62      13.0 +/-    1.62  0.040 / 0.020