PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/03/21-21:27:50
G01     103.3          26.9               11.6 +/-    0.94      21.7 +/-    0.94  0.030 / 0.050
G07     114.1          50.5               12.4 +/-    0.49      15.6 +/-    0.49  0.030 / 0.050
G08     41.5           16.1                8.2 +/-    2.55      19.8 +/-    2.55  0.070 / 0.130
G09     174.6          11.6               13.3 +/-    1.27      35.8 +/-    1.27  0.080 / 0.140
G11     82.1           42.6               12.9 +/-    1.15      18.0 +/-    1.15  0.080 / 0.060
G13     306.5          31.3               10.7 +/-    1.11      18.2 +/-    1.11  0.110 / 0.100
G17     206.2          42.7               13.3 +/-    0.91      18.6 +/-    0.91  0.290 / 0.430
G18     73.6           23.7               10.5 +/-    0.95      21.2 +/-    0.95  0.240 / 0.390
G28     316.5          60.2               10.3 +/-    0.86      11.7 +/-    0.86  0.050 / 0.030
G30     44.1           79.5               12.0 +/-    0.65      12.2 +/-    0.65  0.060 / 0.030