PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-22:43:10
G03     222.4          63.5                8.8 +/-    0.65       9.7 +/-    0.65  0.040 / 0.040
G07     252.2          11.3               -3.3 +/-   17.92      -9.0 +/-   17.92  0.040 / 0.060
G09     306.8          22.4                9.7 +/-    3.16      20.1 +/-    3.16  0.050 / 0.040
G14     104.9          10.3                9.3 +/-    2.00      25.8 +/-    2.00  0.040 / 0.030
G16     119.7          63.2                9.8 +/-    0.78      10.8 +/-    0.78  0.160 / 0.270
G22     191.6          49.0               10.2 +/-    0.88      13.0 +/-    0.88  0.080 / 0.250
G23     324.2          54.1                8.6 +/-    0.56      10.3 +/-    0.56  0.120 / 0.140
G26     61.3           49.1                7.8 +/-    0.92      10.0 +/-    0.92  0.120 / 0.150
G31     55.3           15.9                6.8 +/-    1.05      16.5 +/-    1.05  0.190 / 0.370