PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/12-10:43:00
G01     63.4           31.0                3.6 +/-    1.38       6.2 +/-    1.38  0.060 / 0.050
G07     139.7          24.5                5.5 +/-    1.71      10.9 +/-    1.71  0.050 / 0.050
G11     50.7           28.8                2.0 +/-    1.30       3.7 +/-    1.30  0.050 / 0.140
G13     266.5          37.6                8.2 +/-    1.28      12.4 +/-    1.28  0.060 / 0.150
G15     298.7          15.6                1.3 +/-    2.02       3.2 +/-    2.02  0.040 / 0.050
G17     240.2          71.0                7.7 +/-    0.75       8.1 +/-    0.75  0.030 / 0.040
G18     44.5           15.2                2.2 +/-    1.83       5.4 +/-    1.83  0.060 / 0.110
G19     227.5          48.7                8.1 +/-    0.94      10.3 +/-    0.94  0.060 / 0.130
G28     14.7           60.6                4.5 +/-    0.66       5.1 +/-    0.66  0.040 / 0.060
G30     140.8          58.3                6.5 +/-    0.95       7.5 +/-    0.95  0.040 / 0.060