PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-20:12:50
G01     79.8           32.9               11.9 +/-    1.07      19.7 +/-    1.07  0.070 / 0.110
G07     132.4          32.1               14.9 +/-    1.10      25.1 +/-    1.10  0.070 / 0.090
G11     58.7           35.2               12.8 +/-    1.26      20.2 +/-    1.26  0.070 / 0.120
G13     283.8          38.5               15.0 +/-    4.42      22.4 +/-    4.42  0.080 / 0.130
G15     308.5          13.6                9.6 +/-    2.29      24.6 +/-    2.29  0.060 / 0.100
G17     221.0          62.5               14.1 +/-    1.34      15.7 +/-    1.34  0.080 / 0.110
G18     53.7           20.3               10.8 +/-    3.88      23.6 +/-    3.88  0.160 / 0.110
G19     218.2          34.9               16.0 +/-    1.48      25.5 +/-    1.48  0.090 / 0.080
G28     355.7          61.5               11.0 +/-    0.58      12.3 +/-    0.58  0.030 / 0.030
G30     125.6          67.7               14.2 +/-    0.75      15.3 +/-    0.75  0.030 / 0.030