PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/31-21:12:40
G01     220.9          11.9                8.1 +/-    3.22      21.8 +/-    3.22  0.130 / 0.410
G03     264.3          70.4                8.4 +/-    0.39       8.9 +/-    0.39  0.130 / 0.370
G09     298.9          13.7                7.7 +/-    4.42      19.9 +/-    4.42  0.040 / 0.070
G14     93.2           18.9                9.3 +/-    0.91      21.1 +/-    0.91  0.060 / 0.070
G16     141.3          51.2               12.0 +/-    1.36      14.9 +/-    1.36  0.100 / 0.240
G22     203.5          63.7                9.1 +/-    0.56      10.0 +/-    0.56  0.120 / 0.230
G23     311.6          40.9                8.1 +/-    0.84      11.6 +/-    0.84  0.040 / 0.040
G26     88.4           55.8                8.6 +/-    0.60      10.2 +/-    0.60  0.040 / 0.050
G31     47.0           30.4                6.2 +/-    0.66      10.8 +/-    0.66  0.030 / 0.040