PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/11-20:58:00
G01     72.9           32.8               13.0 +/-    1.40      21.4 +/-    1.40  0.110 / 0.080
G07     135.9          27.3               15.3 +/-    2.02      28.5 +/-    2.02  0.090 / 0.070
G11     54.1           31.5               11.5 +/-    1.32      19.6 +/-    1.32  0.090 / 0.110
G13     276.4          38.5               13.9 +/-    0.74      20.8 +/-    0.74  0.070 / 0.110
G15     303.7          15.2                9.8 +/-    1.45      24.4 +/-    1.45  0.040 / 0.050
G17     228.8          68.3               15.4 +/-    0.70      16.4 +/-    0.70  0.040 / 0.050
G18     48.8           17.7               10.3 +/-    3.19      23.9 +/-    3.19  0.060 / 0.100
G19     221.9          40.1               17.0 +/-    1.94      24.7 +/-    1.94  0.070 / 0.120
G28     7.0            60.9               12.7 +/-    1.25      14.3 +/-    1.25  0.030 / 0.030
G30     133.3          62.6               15.6 +/-    0.41      17.3 +/-    0.41  0.030 / 0.020