PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-18:13:10
G01     91.2           31.0               14.1 +/-    0.38      24.1 +/-    0.38  0.070 / 0.060
G07     125.1          40.5               13.3 +/-    0.73      19.2 +/-    0.73  0.060 / 0.050
G11     68.9           40.3               13.3 +/-    0.65      19.3 +/-    0.65  0.040 / 0.090
G13     295.5          36.5               13.7 +/-    0.98      21.2 +/-    0.98  0.030 / 0.080
G17     212.5          51.9               16.2 +/-    1.02      19.9 +/-    1.02  0.120 / 0.130
G18     63.4           23.4               11.7 +/-    0.99      23.7 +/-    0.99  0.100 / 0.130
G19     213.2          26.3               14.5 +/-    3.57      27.6 +/-    3.57  0.040 / 0.100
G28     335.5          61.4               12.9 +/-    0.81      14.5 +/-    0.81  0.040 / 0.100
G30     104.5          74.7               14.2 +/-    0.31      14.6 +/-    0.31  0.070 / 0.190