PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-18:57:50
G01     66.0           32.2               13.6 +/-    2.07      22.8 +/-    2.07  0.060 / 0.240
G07     139.8          27.6               17.3 +/-    1.66      31.9 +/-    1.66  0.070 / 0.150
G11     51.4           28.3               12.2 +/-    1.53      22.0 +/-    1.53  0.080 / 0.100
G13     269.3          36.8               17.0 +/-    2.23      26.1 +/-    2.23  0.080 / 0.110
G15     299.6          15.6               13.3 +/-    1.00      32.5 +/-    1.00  0.030 / 0.030
G17     240.2          69.9               18.4 +/-    0.55      19.5 +/-    0.55  0.030 / 0.040
G18     46.1           16.2               11.7 +/-    1.48      28.2 +/-    1.48  0.220 / 0.300
G19     227.4          44.0               19.5 +/-    2.18      26.7 +/-    2.18  0.100 / 0.320
G28     27.1           58.2               15.0 +/-    1.28      17.3 +/-    1.28  0.050 / 0.060
G30     139.5          57.2               16.8 +/-    0.70      19.6 +/-    0.70  0.060 / 0.070