PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/16-12:27:40
G01     127.1          10.4               -5.2 +/-   35.71     -14.3 +/-   35.71  0.060 / 0.080
G07     58.6           67.9                5.8 +/-    0.60       6.2 +/-    0.60  0.050 / 0.060
G08     53.4           43.2                4.3 +/-    1.11       6.0 +/-    1.11  0.070 / 0.100
G09     178.7          38.7                6.8 +/-    0.98      10.2 +/-    0.98  0.120 / 0.100
G11     119.9          35.3                7.6 +/-    1.12      12.0 +/-    1.12  0.200 / 0.470
G13     321.0          11.5               -3.0 +/-   13.09      -8.2 +/-   13.09  0.240 / 0.390
G17     200.2          10.7               -7.1 +/-   10.42     -19.5 +/-   10.42  0.140 / 0.000
G18     104.1          15.9                5.6 +/-    2.16      13.6 +/-    2.16  0.150 / 0.300
G28     267.8          47.2                5.3 +/-    3.57       6.9 +/-    3.57  0.030 / 0.040
G30     332.7          60.6                4.8 +/-    0.61       5.5 +/-    0.61  0.020 / 0.030