PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/20-13:12:30
G07     349.8          63.1                6.0 +/-    0.58       6.7 +/-    0.58  0.110 / 0.170
G08     93.4           52.9                6.3 +/-    0.36       7.7 +/-    0.36  0.070 / 0.220
G09     188.4          69.8                6.5 +/-    0.60       6.9 +/-    0.60  0.110 / 0.200
G11     142.3          17.1                5.7 +/-    3.01      13.5 +/-    3.01  0.130 / 0.200
G23     156.0          34.2                6.9 +/-    0.93      11.1 +/-    0.93  0.030 / 0.040
G27     51.8           29.8                5.9 +/-    1.42      10.3 +/-    1.42  0.040 / 0.040
G28     239.1          27.9                6.1 +/-    3.08      11.2 +/-    3.08  0.090 / 0.090
G30     307.4          40.8                5.6 +/-    1.20       8.0 +/-    1.20  0.120 / 0.100