PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/06-19:42:40
G01     58.5           29.7               13.2 +/-    0.68      23.2 +/-    0.68  0.040 / 0.060
G07     141.9          15.3               15.2 +/-    1.34      37.4 +/-    1.34  0.050 / 0.060
G11     47.1           22.3               11.5 +/-    1.31      24.0 +/-    1.31  0.090 / 0.290
G13     260.2          35.6               14.8 +/-    1.24      23.3 +/-    1.24  0.090 / 0.300
G15     292.0          16.6               11.1 +/-    1.61      26.6 +/-    1.61  0.100 / 0.200
G17     262.6          77.4               14.7 +/-    0.46      15.0 +/-    0.46  0.100 / 0.230
G18     40.4           10.9               12.1 +/-    1.58      33.2 +/-    1.58  0.090 / 0.130
G19     233.1          52.2               16.3 +/-    0.98      20.0 +/-    0.98  0.080 / 0.100
G28     29.5           58.6               13.6 +/-    0.61      15.7 +/-    0.61  0.180 / 0.460
G30     144.0          49.0               15.1 +/-    0.88      19.3 +/-    0.88  0.240 / 0.560