PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/28-22:42:30
G03     236.0          67.7               10.9 +/-    1.10      11.7 +/-    1.10  0.060 / 0.040
G09     303.5          18.0                9.5 +/-    1.42      22.1 +/-    1.42  0.050 / 0.040
G14     100.3          14.1               10.5 +/-    2.89      26.7 +/-    2.89  0.170 / 0.150
G16     132.0          59.0               12.6 +/-    0.41      14.4 +/-    0.41  0.230 / 0.330
G22     195.2          55.3               11.3 +/-    0.64      13.4 +/-    0.64  0.030 / 0.040
G23     319.4          49.1               10.0 +/-    0.70      12.8 +/-    0.70  0.030 / 0.050
G26     69.9           52.5                9.0 +/-    0.66      11.1 +/-    0.66  0.120 / 0.420
G31     52.1           20.4                7.9 +/-    3.40      17.2 +/-    3.40  0.120 / 0.380