PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/04-19:27:40
G01     227.5          18.1                9.4 +/-    1.42      21.6 +/-    1.42  0.040 / 0.040
G03     286.5          68.7               10.6 +/-    0.59      11.3 +/-    0.59  0.030 / 0.040
G14     84.9           26.0                8.6 +/-    0.93      16.4 +/-    0.93  0.090 / 0.190
G16     149.6          43.1               11.8 +/-    1.15      16.4 +/-    1.15  0.090 / 0.140
G22     217.3          71.6               10.8 +/-    0.42      11.3 +/-    0.42  0.150 / 0.150
G23     306.7          37.0               10.2 +/-    1.01      15.6 +/-    1.01  0.120 / 0.230
G26     100.1          54.0               11.1 +/-    0.56      13.3 +/-    0.56  0.040 / 0.070
G31     44.6           33.4                7.4 +/-    0.95      12.2 +/-    0.95  0.040 / 0.060