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               12.1 +/-    0.64      20.0 +/-    0.64  0.030 / 0.040
G07     132.8          31.4               12.8 +/-    0.75      21.9 +/-    0.75  0.030 / 0.040
G11     58.2           34.9                9.8 +/-    0.59      15.7 +/-    0.59  0.060 / 0.110
G13     283.0          38.5               13.5 +/-    1.72      20.2 +/-    1.72  0.050 / 0.120
G15     308.0          13.8               10.1 +/-    1.79      25.8 +/-    1.79  0.050 / 0.060
G17     221.7          63.0               15.1 +/-    1.13      16.7 +/-    1.13  0.040 / 0.050
G18     53.2           20.1               10.9 +/-    1.26      23.8 +/-    1.26  0.080 / 0.290
G19     218.6          35.6               12.8 +/-    0.55      20.0 +/-    0.55  0.090 / 0.260
G28     356.8          61.5               11.1 +/-    1.18      12.4 +/-    1.18  0.120 / 0.120
G30     126.6          66.9               13.5 +/-    0.60      14.5 +/-    0.60  0.100 / 0.110