PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/30-14:27:50
G01     105.7          25.4                8.9 +/-    1.37      17.2 +/-    1.37  0.040 / 0.060
G07     110.0          53.6                9.9 +/-    0.41      12.0 +/-    0.41  0.050 / 0.060
G08     42.0           21.8                8.1 +/-    3.16      16.9 +/-    3.16  0.070 / 0.080
G09     175.3          14.5                8.1 +/-    1.11      20.3 +/-    1.11  0.060 / 0.080
G11     87.8           43.5                8.9 +/-    1.04      12.3 +/-    1.04  0.030 / 0.050
G13     308.8          29.9                9.0 +/-    1.24      15.7 +/-    1.24  0.020 / 0.040
G17     205.7          35.9               10.2 +/-    1.32      15.9 +/-    1.32  0.060 / 0.100
G18     78.7           24.1                7.3 +/-    1.66      14.7 +/-    1.66  0.060 / 0.080
G28     307.4          58.6                7.7 +/-    1.12       8.8 +/-    1.12  0.180 / 0.220
G30     36.8           78.6                9.3 +/-    0.94       9.5 +/-    0.94  0.150 / 0.210