PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/22-23:28:10
G02     216.9          62.1               10.1 +/-    0.90      11.3 +/-    0.90  0.130 / 0.350
G06     59.4           76.6                7.3 +/-    0.50       7.5 +/-    0.50  0.070 / 0.290
G12     317.8          34.3                8.0 +/-    0.80      12.8 +/-    0.80  0.080 / 0.090
G17     58.3           31.0                8.5 +/-    1.17      14.6 +/-    1.17  0.070 / 0.080
G19     40.5           48.2                8.3 +/-    0.41      10.7 +/-    0.41  0.050 / 0.080
G24     262.3          41.4               10.3 +/-    1.79      14.7 +/-    1.79  0.040 / 0.110
G28     122.0          16.8               10.6 +/-    2.49      25.2 +/-    2.49  0.040 / 0.030