PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/27-19:12:50
G01     94.8           30.1               10.3 +/-    1.12      17.9 +/-    1.12  0.040 / 0.070
G07     122.5          42.8               12.3 +/-    1.05      17.1 +/-    1.05  0.040 / 0.080
G08     41.8           10.7                8.9 +/-    2.25      24.4 +/-    2.25  0.060 / 0.210
G11     72.4           41.2               11.3 +/-    0.45      16.1 +/-    0.45  0.100 / 0.170
G13     298.9          35.3               12.3 +/-    1.91      19.4 +/-    1.91  0.040 / 0.060
G17     210.4          49.5               14.2 +/-    0.92      18.0 +/-    0.92  0.050 / 0.050
G18     66.3           23.7                9.7 +/-    1.07      19.6 +/-    1.07  0.050 / 0.090
G19     212.0          23.3               12.4 +/-    2.17      25.1 +/-    2.17  0.050 / 0.090
G28     330.2          61.2                9.6 +/-    0.96      10.8 +/-    0.96  0.060 / 0.120
G30     91.8           77.2               11.1 +/-    0.70      11.4 +/-    0.70  0.060 / 0.120