PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-13:43:10
G03     214.2          63.3                8.5 +/-    0.70       9.4 +/-    0.70  0.070 / 0.190
G07     252.9          16.1                6.6 +/-    1.34      15.9 +/-    1.34  0.070 / 0.220
G09     305.8          20.9                6.4 +/-    1.11      13.7 +/-    1.11  0.030 / 0.060
G14     103.7          10.4                5.7 +/-    2.25      15.8 +/-    2.25  0.030 / 0.050
G16     123.1          61.5                9.2 +/-    0.61      10.4 +/-    0.61  0.060 / 0.070
G22     187.9          46.7               10.1 +/-    2.11      13.3 +/-    2.11  0.050 / 0.070
G23     323.8          53.7                7.6 +/-    0.90       9.2 +/-    0.90  0.040 / 0.040
G26     64.3           50.6                5.5 +/-    0.73       6.8 +/-    0.73  0.040 / 0.050
G31     55.0           16.0                5.3 +/-    0.82      12.9 +/-    0.82  0.130 / 0.520