PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-17:42:40
G01     231.3          21.6               14.3 +/-    2.95      30.3 +/-    2.95  0.040 / 0.040
G03     295.9          66.8                9.8 +/-    0.65      10.5 +/-    0.65  0.030 / 0.040
G14     80.1           29.6                9.8 +/-    0.91      17.3 +/-    0.91  0.080 / 0.090
G16     152.0          38.7               15.0 +/-    0.89      22.3 +/-    0.89  0.070 / 0.110
G22     228.6          74.7               12.4 +/-    0.76      12.8 +/-    0.76  0.040 / 0.090
G23     303.5          34.4               10.9 +/-    0.97      17.5 +/-    0.97  0.050 / 0.080
G26     107.7          52.3               13.6 +/-    0.48      16.7 +/-    0.48  0.080 / 0.170
G31     43.2           37.0                8.5 +/-    0.30      12.9 +/-    0.30  0.080 / 0.190