PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/31-13:57:50
G07     323.4          55.3                5.9 +/-    0.81       7.0 +/-    0.81  0.230 / 0.480
G08     119.0          46.1                8.9 +/-    0.69      11.8 +/-    0.69  0.200 / 0.360
G09     260.8          82.6                7.3 +/-    1.12       7.3 +/-    1.12  0.040 / 0.050
G16     43.4           18.4                4.4 +/-    1.23      10.0 +/-    1.23  0.050 / 0.050
G23     149.4          53.1                8.4 +/-    1.02      10.2 +/-    1.02  0.070 / 0.210
G27     70.2           36.9               16.0 +/-    0.72      24.5 +/-    0.72  0.070 / 0.130
G28     227.8          14.6                8.3 +/-    4.05      20.8 +/-    4.05  0.030 / 0.030
G30     293.9          30.1                7.4 +/-    1.42      12.9 +/-    1.42  0.030 / 0.030