PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-15:13:00
G01     49.4           24.8                8.1 +/-    2.56      15.8 +/-    2.56  0.040 / 0.050
G06     177.1          24.7               11.9 +/-    1.34      23.5 +/-    1.34  0.050 / 0.050
G11     44.5           15.6                7.0 +/-    2.75      17.2 +/-    2.75  0.040 / 0.050
G13     249.3          31.1               11.0 +/-    1.49      18.8 +/-    1.49  0.040 / 0.050
G15     283.6          15.6                9.5 +/-    0.99      23.1 +/-    0.99  0.080 / 0.190
G17     297.3          78.1               10.7 +/-    0.78      10.9 +/-    0.78  0.130 / 0.190
G19     246.3          61.3               10.9 +/-    0.74      12.3 +/-    0.74  0.030 / 0.030
G28     43.5           56.6                8.8 +/-    0.90      10.3 +/-    0.90  0.030 / 0.020
G30     149.4          40.3               10.9 +/-    0.85      15.8 +/-    0.85  0.170 / 0.390