PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/12-20:43:00
G01     79.1           32.9               11.2 +/-    1.38      18.5 +/-    1.38  0.060 / 0.080
G07     132.8          31.8               12.8 +/-    1.07      21.6 +/-    1.07  0.050 / 0.080
G11     58.1           34.8               11.7 +/-    1.50      18.6 +/-    1.50  0.080 / 0.090
G13     283.0          38.5               10.4 +/-    4.09      15.5 +/-    4.09  0.110 / 0.120
G15     308.0          13.8                7.9 +/-    1.93      20.2 +/-    1.93  0.090 / 0.100
G17     221.7          63.4               14.2 +/-    1.16      15.7 +/-    1.16  0.110 / 0.110
G18     53.1           20.0                9.7 +/-    2.69      21.4 +/-    2.69  0.070 / 0.130
G19     218.6          35.4               15.7 +/-    1.48      24.7 +/-    1.48  0.060 / 0.120
G28     357.2          61.5               11.9 +/-    0.73      13.3 +/-    0.73  0.130 / 0.290
G30     126.5          67.4               14.2 +/-    0.67      15.3 +/-    0.67  0.130 / 0.230