PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-17:58:10
G01     244.4          31.6               11.3 +/-    1.54      19.2 +/-    1.54  0.030 / 0.040
G03     313.4          53.0                9.8 +/-    1.61      11.9 +/-    1.61  0.040 / 0.050
G14     65.9           38.2               10.2 +/-    0.98      15.3 +/-    0.98  0.070 / 0.280
G16     160.6          23.9               14.4 +/-    2.08      28.8 +/-    2.08  0.080 / 0.290
G22     290.9          72.7                9.7 +/-    1.25      10.1 +/-    1.25  0.030 / 0.050
G23     292.0          24.4               11.1 +/-    1.28      22.0 +/-    1.28  0.030 / 0.050
G26     129.2          43.3               13.7 +/-    2.29      18.9 +/-    2.29  0.050 / 0.110
G31     40.4           51.4                8.7 +/-    1.04      10.8 +/-    1.04  0.040 / 0.110
G32     83.0           18.4               12.1 +/-    1.42      27.6 +/-    1.42  0.040 / 0.060