PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-17:42:50
G01     231.3          21.6               12.9 +/-    1.61      27.3 +/-    1.61  0.030 / 0.030
G03     295.9          66.8               10.7 +/-    0.61      11.6 +/-    0.61  0.030 / 0.030
G14     80.1           29.6               10.3 +/-    2.71      18.3 +/-    2.71  0.090 / 0.150
G16     152.0          38.7               14.9 +/-    0.72      22.2 +/-    0.72  0.080 / 0.140
G22     228.6          74.7               11.4 +/-    0.95      11.8 +/-    0.95  0.070 / 0.080
G23     303.5          34.4                9.3 +/-    1.40      14.9 +/-    1.40  0.080 / 0.090
G26     107.7          52.3               12.4 +/-    0.42      15.2 +/-    0.42  0.060 / 0.070
G31     43.2           37.0                8.5 +/-    1.46      13.0 +/-    1.46  0.040 / 0.080