PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-13:12:40
G03     238.3          71.0                6.5 +/-    0.37       6.8 +/-    0.37  0.030 / 0.050
G09     299.9          13.5                5.1 +/-    6.86      13.1 +/-    6.86  0.040 / 0.050
G14     95.6           17.0                7.3 +/-    1.26      17.4 +/-    1.26  0.050 / 0.040
G16     139.8          53.4                9.1 +/-    0.69      11.0 +/-    0.69  0.040 / 0.030
G22     193.3          57.7                7.5 +/-    0.45       8.7 +/-    0.45  0.050 / 0.040
G23     315.8          45.7                5.8 +/-    0.83       7.7 +/-    0.83  0.050 / 0.040
G26     80.8           54.8                5.9 +/-    0.49       7.0 +/-    0.49  0.130 / 0.250
G31     49.8           23.6                5.1 +/-    2.32      10.2 +/-    2.32  0.100 / 0.240