PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-21:42:30
G01     41.9           17.6               10.3 +/-    3.08      24.0 +/-    3.08  0.120 / 0.200
G06     177.3          34.2               12.5 +/-    1.57      20.2 +/-    1.57  0.120 / 0.150
G13     238.6          23.9               12.0 +/-    2.30      24.0 +/-    2.30  0.150 / 0.250
G15     272.0          13.0                9.8 +/-    1.91      25.5 +/-    1.91  0.120 / 0.180
G17     359.3          71.8               12.9 +/-    0.38      13.5 +/-    0.38  0.040 / 0.040
G19     270.5          68.2               12.4 +/-    1.00      13.3 +/-    1.00  0.030 / 0.040
G24     316.7          18.4                9.4 +/-    2.87      21.5 +/-    2.87  0.040 / 0.060
G28     63.8           51.1               10.6 +/-    0.86      13.2 +/-    0.86  0.030 / 0.060
G30     153.5          28.4               12.5 +/-    1.64      22.7 +/-    1.64  0.070 / 0.160