PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/13-13:28:10
G02     213.8          54.2                6.5 +/-    0.84       7.8 +/-    0.84  0.050 / 0.080
G06     67.8           76.3                6.1 +/-    0.56       6.2 +/-    0.56  0.070 / 0.080
G12     316.9          33.2                3.4 +/-    1.72       5.6 +/-    1.72  0.050 / 0.070
G17     52.4           36.5                5.0 +/-    0.78       7.8 +/-    0.78  0.050 / 0.060
G19     36.6           50.1                5.1 +/-    1.31       6.4 +/-    1.31  0.040 / 0.060
G24     271.9          41.5                7.3 +/-    2.74      10.3 +/-    2.74  0.040 / 0.050
G28     117.7          22.8                7.4 +/-    1.27      15.2 +/-    1.27  0.030 / 0.020