PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/19-23:57:50
G01     89.4           31.7                9.0 +/-    0.90      15.2 +/-    0.90  0.040 / 0.050
G07     126.5          41.0               10.4 +/-    0.40      14.8 +/-    0.40  0.030 / 0.050
G11     66.2           38.8                7.5 +/-    1.63      11.2 +/-    1.63  0.080 / 0.070
G13     293.6          36.8                6.1 +/-    4.33       9.4 +/-    4.33  0.080 / 0.090
G17     213.7          56.3                9.5 +/-    0.75      11.2 +/-    0.75  0.050 / 0.040
G18     59.8           21.9                6.7 +/-    1.90      14.2 +/-    1.90  0.050 / 0.050
G19     214.4          26.8                9.8 +/-    1.54      18.3 +/-    1.54  0.100 / 0.150
G28     342.7          61.7                7.3 +/-    0.63       8.2 +/-    0.63  0.100 / 0.120
G30     105.6          76.1                8.7 +/-    0.41       8.9 +/-    0.41  0.090 / 0.160