PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-21:12:30
G03     224.4          65.0               11.2 +/-    1.42      12.2 +/-    1.42  0.040 / 0.060
G09     305.5          20.4                8.1 +/-    1.10      17.7 +/-    1.10  0.050 / 0.040
G14     103.0          12.2                9.8 +/-    2.00      26.1 +/-    2.00  0.300 / 0.230
G16     122.3          61.9               11.9 +/-    0.41      13.2 +/-    0.41  0.240 / 0.180
G22     192.0          50.9               12.7 +/-    0.72      15.9 +/-    0.72  0.030 / 0.040
G23     322.9          52.8               10.0 +/-    0.40      12.2 +/-    0.40  0.040 / 0.040
G26     63.5           49.8                8.4 +/-    0.71      10.6 +/-    0.71  0.140 / 0.190
G31     54.3           16.8                7.0 +/-    2.84      16.7 +/-    2.84  0.140 / 0.200