PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-22:13:00
G03     255.2          70.0                9.7 +/-    0.32      10.3 +/-    0.32  0.040 / 0.040
G09     301.0          16.4                8.0 +/-    2.53      19.3 +/-    2.53  0.040 / 0.040
G14     95.7           17.1                7.7 +/-    1.05      18.3 +/-    1.05  0.040 / 0.040
G16     136.6          54.2               10.8 +/-    0.77      12.9 +/-    0.77  0.040 / 0.050
G22     200.7          60.9               10.3 +/-    0.30      11.6 +/-    0.30  0.110 / 0.220
G23     313.8          43.2                8.2 +/-    1.00      11.4 +/-    1.00  0.180 / 0.250
G26     81.5           55.1                8.3 +/-    0.59       9.9 +/-    0.59  0.030 / 0.040
G31     48.6           27.1                5.8 +/-    2.04      10.9 +/-    2.04  0.030 / 0.040