PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-02:28:00
G02     33.1           55.6                9.6 +/-    0.67      11.4 +/-    0.67  0.040 / 0.010
G05     138.4          61.4               11.8 +/-    1.19      13.2 +/-    1.19  0.030 / 0.020
G06     53.0           16.9                6.5 +/-    1.22      15.4 +/-    1.22  0.040 / 0.020
G12     201.8          69.6                9.5 +/-    0.73      10.0 +/-    0.73  0.040 / 0.020
G19     98.5           11.6                9.3 +/-    2.05      25.0 +/-    2.05  0.050 / 0.070
G25     300.0          51.7               10.2 +/-    0.41      12.6 +/-    0.41  0.040 / 0.060
G29     306.0          26.3                8.0 +/-    2.22      15.1 +/-    2.22  0.060 / 0.020