PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-13:28:10
G02     227.0          67.7                4.0 +/-    0.73       4.3 +/-    0.73  0.060 / 0.080
G06     43.8           64.4                4.6 +/-    0.38       5.0 +/-    0.38  0.050 / 0.090
G12     320.7          45.6                3.4 +/-    1.21       4.6 +/-    1.21  0.040 / 0.100
G17     63.5           28.1                2.8 +/-    0.93       5.1 +/-    0.93  0.040 / 0.110
G19     50.8           41.4                4.0 +/-    0.47       5.8 +/-    0.47  0.060 / 0.080
G24     254.9          38.1                6.7 +/-    0.96      10.1 +/-    0.96  0.050 / 0.060
G28     126.7          13.0                7.5 +/-    1.59      19.6 +/-    1.59  0.040 / 0.060