PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/29-12:57:40
G01     222.7          14.3                6.0 +/-    2.63      15.2 +/-    2.63  0.030 / 0.040
G03     262.6          72.6                7.0 +/-    0.35       7.3 +/-    0.35  0.030 / 0.040
G14     90.0           21.2                5.9 +/-    1.61      12.7 +/-    1.61  0.300 / 0.320
G16     146.9          46.9                9.2 +/-    0.51      12.0 +/-    0.51  0.140 / 0.290
G22     199.4          64.7                6.5 +/-    0.39       7.1 +/-    0.39  0.040 / 0.030
G23     310.6          40.7                3.8 +/-    1.53       5.5 +/-    1.53  0.040 / 0.030
G26     93.8           55.4                6.7 +/-    0.69       7.9 +/-    0.69  0.040 / 0.050
G31     46.9           29.1                4.6 +/-    2.03       8.1 +/-    2.03  0.040 / 0.060