PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-13:27:50
G03     252.2          70.5                8.4 +/-    0.29       8.9 +/-    0.29  0.120 / 0.250
G09     299.7          13.6                4.0 +/-    9.80      10.3 +/-    9.80  0.130 / 0.210
G14     93.2           22.1                6.7 +/-    1.51      14.1 +/-    1.51  0.060 / 0.050
G16     133.6          54.7                9.4 +/-    0.68      11.2 +/-    0.68  0.050 / 0.050
G22     192.5          58.7                9.1 +/-    0.53      10.5 +/-    0.53  0.040 / 0.050
G23     318.2          48.6                6.7 +/-    0.77       8.6 +/-    0.77  0.040 / 0.040
G26     76.5           52.6                7.4 +/-    1.06       9.0 +/-    1.06  0.030 / 0.030
G31     49.9           22.4                5.7 +/-    2.82      11.8 +/-    2.82  0.040 / 0.030