PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/20-08:12:50
G01     121.2          14.8                5.1 +/-    1.68      12.7 +/-    1.68  0.030 / 0.040
G07     72.5           67.1                5.3 +/-    0.63       5.7 +/-    0.63  0.040 / 0.030
G08     48.1           37.5                3.7 +/-    0.63       5.7 +/-    0.63  0.030 / 0.040
G09     176.6          30.0                5.6 +/-    2.77       9.8 +/-    2.77  0.030 / 0.040
G11     114.1          39.2                6.3 +/-    0.92       9.3 +/-    0.92  0.100 / 0.170
G13     319.0          17.2                1.7 +/-    2.61       4.0 +/-    2.61  0.100 / 0.230
G17     200.7          18.0                2.5 +/-    0.70       5.9 +/-    0.70  0.090 / 0.270
G18     97.9           19.1                5.3 +/-    0.79      11.9 +/-    0.79  0.100 / 0.250
G28     276.0          50.1                5.5 +/-    1.37       7.0 +/-    1.37  0.060 / 0.130
G30     336.4          63.8                3.7 +/-    0.54       4.1 +/-    0.54  0.060 / 0.110