PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/09-20:27:50
G01     94.2           30.3               14.0 +/-    1.29      24.4 +/-    1.29  0.030 / 0.030
G07     122.9          43.0               14.4 +/-    0.46      20.0 +/-    0.46  0.020 / 0.020
G08     41.9           9.8                 8.2 +/-    3.23      23.0 +/-    3.23  0.150 / 0.230
G11     71.5           40.9               11.5 +/-    1.04      16.5 +/-    1.04  0.140 / 0.250
G13     298.3          35.4               11.4 +/-    1.09      18.0 +/-    1.09  0.070 / 0.120
G17     210.7          50.7               17.1 +/-    0.91      21.4 +/-    0.91  0.080 / 0.110
G18     65.3           23.4               10.2 +/-    1.53      20.6 +/-    1.53  0.080 / 0.120
G19     212.3          23.6                8.2 +/-    2.24      16.5 +/-    2.24  0.080 / 0.100
G28     332.1          61.4               10.7 +/-    0.99      12.1 +/-    0.99  0.060 / 0.130
G30     92.4           77.5               12.3 +/-    0.55      12.6 +/-    0.55  0.070 / 0.180