PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-20:12:40
G01     231.7          22.0               14.1 +/-    2.39      29.5 +/-    2.39  0.030 / 0.030
G03     299.5          64.3                9.3 +/-    0.97      10.1 +/-    0.97  0.040 / 0.030
G14     80.1           29.0                9.0 +/-    0.95      16.1 +/-    0.95  0.080 / 0.200
G16     154.1          37.2               12.3 +/-    0.57      18.7 +/-    0.57  0.090 / 0.160
G22     237.6          75.0               10.0 +/-    0.56      10.3 +/-    0.56  0.050 / 0.060
G23     302.3          32.8               10.1 +/-    1.36      16.7 +/-    1.36  0.040 / 0.060
G26     110.7          52.1               10.2 +/-    0.93      12.5 +/-    0.93  0.060 / 0.110
G31     42.7           38.7                6.5 +/-    0.72       9.6 +/-    0.72  0.050 / 0.100
G32     94.1           10.2                8.9 +/-    1.22      24.8 +/-    1.22  0.090 / 0.190