PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-07:58:10
G01     126.2          10.8              -14.5 +/-   28.23     -39.7 +/-   28.23  0.030 / 0.040
G07     54.8           68.9                5.7 +/-    0.51       6.0 +/-    0.51  0.040 / 0.040
G08     52.7           42.5                4.1 +/-    0.34       5.7 +/-    0.34  0.030 / 0.040
G09     177.2          36.6                7.0 +/-    0.64      10.8 +/-    0.64  0.020 / 0.040
G11     121.1          35.7                6.8 +/-    1.03      10.7 +/-    1.03  0.300 / 0.300
G13     320.9          12.1                1.0 +/-   10.44       2.6 +/-   10.44  0.170 / 0.290
G17     199.9          11.9                0.9 +/-   12.33       2.5 +/-   12.33  0.130 / 0.550
G18     103.9          16.2                5.2 +/-    0.75      12.6 +/-    0.75  0.130 / 0.470
G28     267.4          46.4                7.3 +/-    1.42       9.6 +/-    1.42  0.050 / 0.080
G30     329.3          58.5                3.7 +/-    0.58       4.2 +/-    0.58  0.050 / 0.060