PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-16:57:50
G03     189.4          20.2               12.1 +/-    1.59      26.6 +/-    1.59  0.050 / 0.080
G07     289.1          36.5               11.5 +/-    1.74      17.8 +/-    1.74  0.050 / 0.090
G08     146.0          25.8               14.6 +/-    0.95      28.0 +/-    0.95  0.030 / 0.040
G09     320.4          61.3               12.2 +/-    0.82      13.7 +/-    0.82  0.030 / 0.040
G16     42.8           38.4                8.9 +/-    0.53      13.3 +/-    0.53  0.050 / 0.090
G23     117.9          75.5               11.7 +/-    0.63      12.1 +/-    0.63  0.050 / 0.110
G26     43.4           10.6                9.7 +/-    2.20      26.8 +/-    2.20  0.140 / 0.390
G27     99.8           33.5               13.7 +/-    0.71      22.4 +/-    0.71  0.160 / 0.440
G30     273.7          13.5               12.3 +/-    1.55      31.7 +/-    1.55  0.050 / 0.100