PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-09:57:40
G01     63.3           30.9                3.3 +/-    1.37       5.7 +/-    1.37  0.030 / 0.040
G07     139.7          24.8                4.7 +/-    1.85       9.3 +/-    1.85  0.040 / 0.040
G11     50.8           29.0                2.9 +/-    1.24       5.1 +/-    1.24  0.050 / 0.120
G13     266.5          37.6                7.0 +/-    1.12      10.7 +/-    1.12  0.050 / 0.120
G15     298.1          15.8                3.7 +/-    3.29       9.0 +/-    3.29  0.030 / 0.040
G17     240.7          71.5                5.7 +/-    0.51       5.9 +/-    0.51  0.040 / 0.030
G18     44.5           15.2                1.7 +/-    1.57       4.2 +/-    1.57  0.060 / 0.110
G19     227.5          48.8                7.3 +/-    0.85       9.4 +/-    0.85  0.050 / 0.120
G28     14.3           60.6                3.5 +/-    0.64       4.0 +/-    0.64  0.040 / 0.060
G30     140.9          58.8                4.1 +/-    0.47       4.7 +/-    0.47  0.040 / 0.060