PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/22-21:27:50
G01     126.0          12.6               14.6 +/-    2.17      38.4 +/-    2.17  0.040 / 0.050
G07     55.8           69.5               14.0 +/-    0.48      14.8 +/-    0.48  0.040 / 0.040
G08     51.5           42.0               12.2 +/-    0.71      17.2 +/-    0.71  0.100 / 0.430
G09     178.8          35.5               15.0 +/-    1.47      23.6 +/-    1.47  0.110 / 0.370
G11     119.8          35.6               15.3 +/-    0.56      24.1 +/-    0.56  0.020 / 0.030
G13     321.0          12.2               12.3 +/-    3.21      32.6 +/-    3.21  0.020 / 0.040
G17     201.2          13.5               18.8 +/-    1.70      48.4 +/-    1.70  0.040 / 0.070
G18     11.8           -21.1              24.6 +/-    1.60      52.7 +/-    1.60  0.050 / 0.060
G28     279.3          54.0               15.3 +/-    0.81      18.5 +/-    0.81  0.110 / 0.460
G30     339.4          63.9               12.4 +/-    0.67      13.6 +/-    0.67  0.110 / 0.510