PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/19-16:28:20
G02     203.3          31.9                9.3 +/-    1.41      15.6 +/-    1.41  0.080 / 0.120
G12     305.9          13.2                8.2 +/-    1.99      21.2 +/-    1.99  0.110 / 0.110
G17     31.5           52.6                8.2 +/-    1.56      10.1 +/-    1.56  0.040 / 0.050
G19     1.5            65.5                7.9 +/-    0.68       8.6 +/-    0.68  0.030 / 0.040
G24     299.4          36.9                8.6 +/-    2.39      13.2 +/-    2.39  0.070 / 0.130
G28     97.8           37.2                9.6 +/-    1.01      14.6 +/-    1.01  0.050 / 0.090