PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-07:27:50
G08     311.9          18.0                4.4 +/-    1.79      10.2 +/-    1.79  0.060 / 0.060
G10     329.1          59.7                3.7 +/-    0.61       4.3 +/-    0.61  0.050 / 0.080
G14     216.2          28.9                7.7 +/-    2.75      13.8 +/-    2.75  0.040 / 0.040
G15     46.5           11.4                3.9 +/-    2.85      10.7 +/-    2.85  0.040 / 0.040
G20     32.9           61.3                3.6 +/-    0.58       4.1 +/-    0.58  0.030 / 0.030
G21     131.6          58.1                8.0 +/-    0.39       9.2 +/-    0.39  0.030 / 0.030
G24     76.1           29.7                5.7 +/-    1.15      10.1 +/-    1.15  0.090 / 0.080
G27     280.3          37.4                7.3 +/-    1.68      11.1 +/-    1.68  0.060 / 0.080
G32     220.8          45.0                8.6 +/-    1.66      11.6 +/-    1.66  0.190 / 0.230