PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/20-16:57:40
G07     332.7          58.5               10.0 +/-    0.67      11.5 +/-    0.67  0.030 / 0.040
G08     108.8          49.2               11.9 +/-    0.66      15.2 +/-    0.66  0.030 / 0.040
G09     217.2          80.8               10.4 +/-    0.33      10.5 +/-    0.33  0.140 / 0.410
G11     148.8          10.0               -3.8 +/-   17.31     -10.6 +/-   17.31  0.340 / 0.470
G16     44.5           15.5                8.6 +/-    2.07      21.1 +/-    2.07  0.110 / 0.110
G23     152.9          48.9               12.4 +/-    0.49      15.8 +/-    0.49  0.170 / 0.090
G27     63.9           35.7                9.3 +/-    1.34      14.5 +/-    1.34  0.080 / 0.060
G28     231.3          19.9               11.7 +/-    1.95      25.8 +/-    1.95  0.050 / 0.070
G30     297.5          32.2                9.7 +/-    2.60      16.3 +/-    2.60  0.030 / 0.030