PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-17:42:40
G02     201.7          27.1               13.4 +/-    1.65      25.0 +/-    1.65  0.050 / 0.080
G06     166.5          61.5               13.9 +/-    0.82      15.6 +/-    0.82  0.050 / 0.090
G17     27.2           55.8               10.2 +/-    1.15      12.0 +/-    1.15  0.130 / 0.190
G19     348.0          68.6               10.2 +/-    0.72      10.9 +/-    0.72  0.100 / 0.200
G24     304.3          34.2               10.2 +/-    1.69      16.5 +/-    1.69  0.070 / 0.110
G28     92.1           40.2               11.3 +/-    1.40      16.4 +/-    1.40  0.070 / 0.120