PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/13-08:27:50
G08     310.6          18.8                4.2 +/-    1.20       9.5 +/-    1.20  0.050 / 0.040
G10     331.3          60.0                5.1 +/-    0.50       5.8 +/-    0.50  0.060 / 0.040
G14     216.8          30.1                7.1 +/-    1.63      12.4 +/-    1.63  0.040 / 0.020
G15     46.7           10.5                3.6 +/-    3.02      10.0 +/-    3.02  0.040 / 0.030
G20     35.3           60.8                5.2 +/-    0.66       5.8 +/-    0.66  0.110 / 0.240
G21     132.9          56.4                8.1 +/-    0.61       9.5 +/-    0.61  0.100 / 0.140
G24     74.4           29.5                5.5 +/-    1.12       9.7 +/-    1.12  0.060 / 0.070
G27     278.9          37.3                7.3 +/-    1.04      11.1 +/-    1.04  0.070 / 0.060
G32     221.8          45.1                8.5 +/-    2.03      11.4 +/-    2.03  0.270 / 0.250