PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-14:28:10
G03     234.2          68.4               10.0 +/-    1.16      10.6 +/-    1.16  0.090 / 0.280
G09     302.8          17.1                7.0 +/-    2.37      16.6 +/-    2.37  0.100 / 0.270
G14     97.9           18.3                8.6 +/-    1.06      19.6 +/-    1.06  0.040 / 0.040
G16     125.3          58.8               10.8 +/-    0.65      12.3 +/-    0.65  0.050 / 0.040
G22     188.3          52.3               11.8 +/-    1.43      14.5 +/-    1.43  0.050 / 0.050
G23     322.8          52.7               10.2 +/-    0.92      12.5 +/-    0.92  0.070 / 0.060
G26     68.2           50.6                8.8 +/-    0.42      11.1 +/-    0.42  0.050 / 0.070
G31     52.4           18.4                6.2 +/-    0.91      14.3 +/-    0.91  0.060 / 0.070