PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/20-22:42:50
G01     64.9           31.8                9.2 +/-    1.66      15.5 +/-    1.66  0.080 / 0.110
G07     139.5          21.9               11.5 +/-    1.46      24.1 +/-    1.46  0.070 / 0.120
G11     49.7           26.3                7.2 +/-    2.06      13.7 +/-    2.06  0.110 / 0.070
G13     267.6          37.3               10.4 +/-    2.17      15.9 +/-    2.17  0.090 / 0.080
G15     297.7          16.2                8.4 +/-    1.17      20.4 +/-    1.17  0.090 / 0.070
G17     244.8          74.9               10.9 +/-    0.26      11.2 +/-    0.26  0.090 / 0.090
G18     43.4           13.7                8.0 +/-    1.31      20.5 +/-    1.31  0.040 / 0.040
G19     227.4          46.2               11.9 +/-    2.48      15.7 +/-    2.48  0.040 / 0.040
G28     20.8           59.6                7.7 +/-    0.50       8.8 +/-    0.50  0.030 / 0.030
G30     140.1          56.5               10.6 +/-    0.61      12.4 +/-    0.61  0.040 / 0.030