PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/19-22:42:50
G02     219.4          64.5               17.1 +/-    0.90      18.7 +/-    0.90  0.070 / 0.060
G06     49.9           70.2               15.4 +/-    0.65      16.2 +/-    0.65  0.060 / 0.060
G12     319.9          40.2               13.6 +/-    1.76      19.7 +/-    1.76  0.200 / 0.370
G17     58.8           32.5               12.4 +/-    0.99      20.7 +/-    0.99  0.310 / 0.430
G19     42.1           48.0               14.1 +/-    0.85      18.3 +/-    0.85  0.040 / 0.020
G24     260.0          40.6               17.9 +/-    4.49      25.7 +/-    4.49  0.030 / 0.030
G28     125.2          10.6               20.1 +/-    2.98      55.4 +/-    2.98  0.040 / 0.050