PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-18:12:50
G01     94.0           30.3               12.1 +/-    1.04      21.1 +/-    1.04  0.040 / 0.050
G07     123.1          42.5               12.7 +/-    0.93      17.7 +/-    0.93  0.030 / 0.060
G08     41.9           10.6                9.5 +/-    3.80      26.0 +/-    3.80  0.040 / 0.060
G11     71.8           41.1               11.0 +/-    2.11      15.7 +/-    2.11  0.040 / 0.060
G13     298.2          35.6               10.6 +/-    1.14      16.6 +/-    1.14  0.040 / 0.070
G17     210.9          49.6               12.9 +/-    0.84      16.4 +/-    0.84  0.050 / 0.080
G18     65.9           23.7               10.5 +/-    1.11      21.1 +/-    1.11  0.140 / 0.210
G19     212.2          24.1               13.2 +/-    2.08      26.3 +/-    2.08  0.120 / 0.190
G28     330.9          61.2                9.9 +/-    0.70      11.2 +/-    0.70  0.090 / 0.110
G30     96.2           76.3               12.7 +/-    0.53      13.0 +/-    0.53  0.080 / 0.140