PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/12-13:57:40
G07     2.1            65.4                8.0 +/-    0.56       8.7 +/-    0.56  0.110 / 0.130
G08     82.7           52.8                7.0 +/-    0.91       8.6 +/-    0.91  0.110 / 0.180
G09     184.5          63.7                9.1 +/-    0.36      10.1 +/-    0.36  0.110 / 0.330
G11     138.3          20.8                7.7 +/-    1.91      16.7 +/-    1.91  0.090 / 0.270
G23     157.5          28.9                9.2 +/-    1.47      16.6 +/-    1.47  0.040 / 0.040
G27     47.4           26.4                6.3 +/-    2.04      12.0 +/-    2.04  0.030 / 0.040
G28     243.9          32.4                8.7 +/-    1.99      14.4 +/-    1.99  0.150 / 0.120
G30     312.6          45.1                7.5 +/-    1.21      10.1 +/-    1.21  0.220 / 0.100