PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/09-12:57:50
G01     229.4          19.8                5.1 +/-    0.95      11.3 +/-    0.95  0.060 / 0.190
G03     293.3          66.8                4.0 +/-    0.89       4.3 +/-    0.89  0.080 / 0.160
G14     81.0           30.4                5.9 +/-    0.46      10.3 +/-    0.46  0.050 / 0.090
G16     148.0          42.1                7.3 +/-    0.86      10.2 +/-    0.86  0.050 / 0.090
G22     210.5          72.0                5.6 +/-    0.75       5.8 +/-    0.75  0.060 / 0.080
G23     307.3          38.8                2.9 +/-    0.85       4.3 +/-    0.85  0.060 / 0.080
G26     101.1          52.9                5.9 +/-    0.46       7.2 +/-    0.46  0.040 / 0.050
G31     44.4           33.5                4.3 +/-    0.50       7.0 +/-    0.50  0.030 / 0.050