PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/15-02:58:10
G02     202.0          31.9                5.1 +/-    1.49       8.6 +/-    1.49  0.040 / 0.030
G06     172.0          61.7                4.8 +/-    0.81       5.4 +/-    0.81  0.040 / 0.030
G12     304.7          10.9               -6.5 +/-    5.87     -17.7 +/-    5.87  0.130 / 0.300
G17     35.0           49.8                3.0 +/-    1.31       3.8 +/-    1.31  0.090 / 0.090
G19     350.9          67.5                2.9 +/-    0.75       3.1 +/-    0.75  0.100 / 0.090
G24     299.0          38.4                3.5 +/-    2.28       5.3 +/-    2.28  0.030 / 0.030
G28     97.3           36.1                5.1 +/-    0.66       7.9 +/-    0.66  0.040 / 0.030