PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-16:58:00
G01     124.8          12.7               13.5 +/-    1.98      35.4 +/-    1.98  0.050 / 0.080
G07     73.1           65.2               13.2 +/-    0.46      14.4 +/-    0.46  0.050 / 0.110
G08     49.0           37.9               11.0 +/-    0.45      16.6 +/-    0.45  0.030 / 0.050
G09     178.7          35.3               12.2 +/-    1.60      19.2 +/-    1.60  0.030 / 0.040
G11     114.8          37.2               14.2 +/-    0.83      21.6 +/-    0.83  0.130 / 0.340
G13     320.2          14.2               10.1 +/-    3.29      25.5 +/-    3.29  0.120 / 0.410
G17     199.8          16.6               11.9 +/-    0.88      28.5 +/-    0.88  0.060 / 0.140
G18     99.9           17.6               11.9 +/-    1.67      27.8 +/-    1.67  0.050 / 0.130
G28     273.8          50.2               11.6 +/-    1.01      14.6 +/-    1.01  0.100 / 0.360
G30     339.3          64.4               11.6 +/-    0.81      12.7 +/-    0.81  0.110 / 0.340