PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-17:28:00
G07     30.6           67.8                9.0 +/-    0.67       9.6 +/-    0.67  0.060 / 0.060
G08     64.7           48.4                8.5 +/-    0.94      10.9 +/-    0.94  0.050 / 0.050
G09     181.2          52.7               11.7 +/-    0.67      14.2 +/-    0.67  0.030 / 0.030
G11     130.2          27.4                8.5 +/-    1.31      15.8 +/-    1.31  0.030 / 0.040
G18     113.7          9.5                -8.6 +/-   16.33     -24.1 +/-   16.33  0.070 / 0.140
G23     159.9          20.8                8.7 +/-    0.93      18.8 +/-    0.93  0.070 / 0.140
G27     41.8           19.7                7.8 +/-    1.89      17.3 +/-    1.89  0.220 / 0.290
G28     254.0          40.4               11.0 +/-    2.26      15.9 +/-    2.26  0.200 / 0.320
G30     320.4          51.2                9.1 +/-    0.66      11.4 +/-    0.66  0.130 / 0.210