PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-13:42:50
G07     56.7           67.8                6.7 +/-    0.74       7.1 +/-    0.74  0.030 / 0.040
G08     53.9           43.3                6.7 +/-    0.36       9.3 +/-    0.36  0.020 / 0.040
G09     179.1          40.3               11.0 +/-    1.45      16.0 +/-    1.45  0.080 / 0.090
G11     120.8          34.6                8.3 +/-    1.17      13.2 +/-    1.17  0.060 / 0.090
G13     321.3          10.4               -7.7 +/-   13.04     -21.3 +/-   13.04  0.060 / 0.110
G17     199.8          10.3               -6.3 +/-   18.24     -17.5 +/-   18.24  0.060 / 0.130
G18     105.0          15.3                8.6 +/-    1.88      21.3 +/-    1.88  0.240 / 0.390
G27     37.7           10.2                6.9 +/-    2.17      19.0 +/-    2.17  0.140 / 0.360
G28     266.4          46.7               10.0 +/-    0.58      13.2 +/-    0.58  0.120 / 0.270
G30     332.6          60.4                6.9 +/-    0.57       7.8 +/-    0.57  0.260 / 0.420