PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/31-12:43:10
G01     38.4           12.2                2.6 +/-    1.67       6.8 +/-    1.67  0.110 / 0.270
G06     172.3          43.9                5.3 +/-    1.34       7.3 +/-    1.34  0.100 / 0.190
G13     233.0          19.9                4.9 +/-    0.93      10.9 +/-    0.93  0.090 / 0.130
G15     268.2          10.6                1.8 +/-    4.07       5.0 +/-    4.07  0.120 / 0.190
G17     2.2            69.4                3.8 +/-    0.67       4.0 +/-    0.67  0.040 / 0.080
G19     293.8          71.9                3.3 +/-    0.70       3.5 +/-    0.70  0.040 / 0.070
G24     315.3          21.3                0.9 +/-    4.37       1.8 +/-    4.37  0.050 / 0.060
G28     69.9           50.1                2.9 +/-    0.37       3.7 +/-    0.37  0.050 / 0.070
G30     155.8          24.5                4.3 +/-    1.07       8.6 +/-    1.07  0.100 / 0.220