PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/31-17:13:10
G01     83.5           32.4                9.4 +/-    1.07      15.6 +/-    1.07  0.040 / 0.060
G07     130.0          35.6               10.3 +/-    0.66      16.1 +/-    0.66  0.040 / 0.060
G11     62.2           37.5                8.9 +/-    0.90      13.6 +/-    0.90  0.040 / 0.080
G13     287.8          38.2                9.7 +/-    0.99      14.5 +/-    0.99  0.040 / 0.080
G15     311.1          12.4                9.0 +/-    1.90      23.8 +/-    1.90  0.070 / 0.120
G17     217.6          57.6               13.1 +/-    1.37      15.2 +/-    1.37  0.060 / 0.110
G18     57.4           21.9                7.3 +/-    0.99      15.3 +/-    0.99  0.050 / 0.110
G19     216.2          32.5               13.4 +/-    1.36      22.3 +/-    1.36  0.040 / 0.110
G28     347.5          61.6                9.1 +/-    0.57      10.2 +/-    0.57  0.060 / 0.120
G30     120.8          68.8               11.0 +/-    0.89      11.7 +/-    0.89  0.070 / 0.110