PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-21:43:10
G01     234.3          24.2                8.4 +/-    2.23      16.7 +/-    2.23  0.030 / 0.030
G03     305.1          60.6                9.1 +/-    0.95      10.3 +/-    0.95  0.030 / 0.030
G14     77.4           30.5                8.7 +/-    1.29      15.1 +/-    1.29  0.040 / 0.070
G16     157.1          33.3                9.7 +/-    1.08      15.8 +/-    1.08  0.030 / 0.050
G22     254.5          75.6               10.6 +/-    0.68      10.9 +/-    0.68  0.080 / 0.120
G23     299.5          30.0                8.9 +/-    2.00      15.5 +/-    2.00  0.080 / 0.110
G26     117.5          50.4               11.4 +/-    0.61      14.3 +/-    0.61  0.060 / 0.130
G31     41.5           42.7                7.8 +/-    1.15      10.9 +/-    1.15  0.070 / 0.110
G32     91.4           12.7                9.4 +/-    1.57      24.7 +/-    1.57  0.120 / 0.180