PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-21:13:00
G01     220.9          11.9                8.3 +/-    2.93      22.2 +/-    2.93  0.040 / 0.040
G03     264.3          70.4                9.6 +/-    1.36      10.1 +/-    1.36  0.040 / 0.040
G09     298.9          13.7                6.4 +/-    1.29      16.5 +/-    1.29  0.180 / 0.330
G14     93.2           18.9                9.1 +/-    1.13      20.5 +/-    1.13  0.180 / 0.330
G16     141.3          51.2               12.3 +/-    1.02      15.3 +/-    1.02  0.110 / 0.200
G22     203.5          63.7                9.8 +/-    0.95      10.8 +/-    0.95  0.120 / 0.190
G23     311.6          40.9                8.8 +/-    1.48      12.7 +/-    1.48  0.090 / 0.080
G26     88.4           55.8                9.8 +/-    0.87      11.6 +/-    0.87  0.040 / 0.080
G31     47.0           30.4                7.0 +/-    2.14      12.2 +/-    2.14  0.040 / 0.050