PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/17-20:28:10
G01     75.4           32.9               10.2 +/-    1.67      16.8 +/-    1.67  0.090 / 0.100
G07     134.7          28.9               13.9 +/-    2.91      24.8 +/-    2.91  0.080 / 0.120
G11     55.7           32.9                9.5 +/-    1.63      15.8 +/-    1.63  0.140 / 0.110
G13     279.1          38.6               10.7 +/-    2.13      15.9 +/-    2.13  0.100 / 0.110
G15     305.5          14.7                6.8 +/-    1.93      17.1 +/-    1.93  0.040 / 0.040
G17     225.6          66.1               13.7 +/-    0.73      14.8 +/-    0.73  0.050 / 0.050
G18     50.6           18.8                9.9 +/-    2.56      22.3 +/-    2.56  0.060 / 0.110
G19     220.5          38.3               13.1 +/-    2.50      19.6 +/-    2.50  0.070 / 0.100
G28     2.9            61.2               10.6 +/-    0.96      11.9 +/-    0.96  0.030 / 0.030
G30     130.8          64.3               12.7 +/-    1.03      13.9 +/-    1.03  0.030 / 0.030