PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/31-20:12:50
G01     117.9          18.1               12.4 +/-    0.71      28.6 +/-    0.71  0.030 / 0.040
G07     90.6           61.4               12.4 +/-    1.10      13.9 +/-    1.10  0.030 / 0.040
G08     44.2           29.6                9.4 +/-    1.58      16.6 +/-    1.58  0.100 / 0.080
G09     177.4          26.2               13.2 +/-    2.58      25.2 +/-    2.58  0.070 / 0.060
G11     103.7          40.8               13.1 +/-    0.85      18.8 +/-    0.85  0.110 / 0.140
G13     317.0          20.8                9.9 +/-    2.33      21.4 +/-    2.33  0.120 / 0.150
G17     200.9          26.5               14.1 +/-    1.26      26.7 +/-    1.26  0.080 / 0.170
G18     90.5           20.9               11.9 +/-    1.51      25.7 +/-    1.51  0.080 / 0.180
G28     288.0          55.1               11.9 +/-    2.20      14.2 +/-    2.20  0.040 / 0.030
G30     350.1          70.1               12.0 +/-    0.46      12.6 +/-    0.46  0.040 / 0.030