PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-19:58:00
G01     79.0           32.9               12.2 +/-    1.29      20.1 +/-    1.29  0.070 / 0.090
G07     132.8          31.4               13.2 +/-    1.49      22.6 +/-    1.49  0.070 / 0.080
G11     58.2           34.9               12.9 +/-    1.23      20.5 +/-    1.23  0.030 / 0.030
G13     283.0          38.5               14.1 +/-    3.45      21.0 +/-    3.45  0.030 / 0.040
G15     308.0          13.8               10.5 +/-    1.80      26.9 +/-    1.80  0.040 / 0.040
G17     221.7          63.0               16.9 +/-    1.19      18.7 +/-    1.19  0.040 / 0.050
G18     53.2           20.1               10.8 +/-    2.57      23.8 +/-    2.57  0.110 / 0.280
G19     218.6          35.6               16.1 +/-    1.49      25.2 +/-    1.49  0.160 / 0.190
G28     356.8          61.5               12.8 +/-    0.80      14.4 +/-    0.80  0.070 / 0.130
G30     126.6          66.9               14.7 +/-    0.70      15.9 +/-    0.70  0.060 / 0.090