PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/28-02:57:20
G02     45.9           44.0                6.7 +/-    1.42       9.2 +/-    1.42  0.040 / 0.050
G05     99.5           68.8                9.0 +/-    0.82       9.5 +/-    0.82  0.040 / 0.050
G12     189.7          52.7               11.5 +/-    1.16      14.1 +/-    1.16  0.040 / 0.070
G25     273.1          58.0                9.6 +/-    0.41      11.1 +/-    0.41  0.040 / 0.080
G29     316.3          38.0                8.1 +/-    0.98      12.1 +/-    0.98  0.030 / 0.040