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                5.0 +/-    1.03       5.5 +/-    1.03  0.040 / 0.050
G08     93.4           52.9                5.6 +/-    0.76       6.8 +/-    0.76  0.040 / 0.050
G09     188.4          69.8                5.3 +/-    0.64       5.6 +/-    0.64  0.080 / 0.200
G11     142.3          17.1                6.4 +/-    1.64      15.2 +/-    1.64  0.080 / 0.230
G23     156.0          34.2                6.7 +/-    1.12      10.8 +/-    1.12  0.080 / 0.210
G27     51.8           29.8                6.0 +/-    0.39      10.5 +/-    0.39  0.080 / 0.240
G28     239.1          27.9                5.7 +/-    0.91      10.5 +/-    0.91  0.080 / 0.080
G30     307.4          40.8                4.2 +/-    1.30       6.0 +/-    1.30  0.090 / 0.090