PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-19:42:50
G01     104.4          26.3               10.3 +/-    1.55      19.4 +/-    1.55  0.030 / 0.040
G07     113.1          50.6               12.6 +/-    0.82      15.8 +/-    0.82  0.030 / 0.050
G08     41.6           17.7                9.1 +/-    1.66      21.1 +/-    1.66  0.070 / 0.180
G09     175.1          13.0               13.2 +/-    3.29      34.6 +/-    3.29  0.070 / 0.140
G11     84.1           42.9               11.5 +/-    0.89      15.9 +/-    0.89  0.210 / 0.350
G13     307.5          30.7               11.4 +/-    1.49      19.6 +/-    1.49  0.270 / 0.360
G17     205.8          40.7               13.7 +/-    1.46      19.7 +/-    1.46  0.070 / 0.060
G18     75.6           23.9                9.2 +/-    1.31      18.4 +/-    1.31  0.040 / 0.050
G28     313.3          59.8               10.7 +/-    0.66      12.2 +/-    0.66  0.040 / 0.030
G30     42.1           79.1               12.4 +/-    1.19      12.6 +/-    1.19  0.030 / 0.030