PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/25-18:28:10
G07     90.3           61.0               13.9 +/-    0.89      15.6 +/-    0.89  0.030 / 0.030
G08     44.7           30.9               10.0 +/-    0.80      17.2 +/-    0.80  0.030 / 0.030
G09     177.6          27.2               13.2 +/-    1.69      24.4 +/-    1.69  0.100 / 0.220
G11     105.0          40.6               13.6 +/-    0.84      19.6 +/-    0.84  0.110 / 0.220
G13     317.3          20.3               11.8 +/-    2.08      25.8 +/-    2.08  0.220 / 0.310
G17     201.0          25.0               16.7 +/-    2.45      32.6 +/-    2.45  0.210 / 0.350
G18     91.9           20.7               11.9 +/-    2.12      25.8 +/-    2.12  0.090 / 0.130
G28     286.2          54.4               14.5 +/-    2.34      17.4 +/-    2.34  0.070 / 0.140
G30     350.8          70.2               13.4 +/-    0.78      14.2 +/-    0.78  0.100 / 0.090