PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/14-08:27:50
G01     318.0          21.1                3.2 +/-    1.73       6.8 +/-    1.73  0.100 / 0.320
G08     255.3          12.0                4.6 +/-   18.91      12.3 +/-   18.91  0.120 / 0.250
G10     84.8           50.3                3.2 +/-    1.17       4.0 +/-    1.17  0.200 / 0.300
G11     299.9          24.5                2.5 +/-    1.72       4.9 +/-    1.72  0.140 / 0.260
G14     307.3          71.5                2.5 +/-    0.69       2.6 +/-    0.69  0.040 / 0.040
G18     300.7          43.9                4.3 +/-    3.61       5.9 +/-    3.61  0.050 / 0.030
G20     108.0          26.9                4.3 +/-    0.83       8.0 +/-    0.83  0.030 / 0.020
G22     303.2          15.2                1.6 +/-    2.55       4.1 +/-    2.55  0.030 / 0.020
G31     175.0          45.1                6.3 +/-    0.80       8.5 +/-    0.80  0.050 / 0.050
G32     4.0            67.8                3.3 +/-    0.60       3.5 +/-    0.60  0.040 / 0.060