PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-21:42:50
G03     239.1          68.5               11.0 +/-    0.52      11.7 +/-    0.52  0.030 / 0.060
G09     303.7          19.5               10.7 +/-    2.51      23.8 +/-    2.51  0.040 / 0.050
G14     99.6           13.9               12.9 +/-    1.40      32.9 +/-    1.40  0.100 / 0.350
G16     129.9          58.1               11.2 +/-    0.41      12.9 +/-    0.41  0.130 / 0.350
G22     196.0          55.7               11.7 +/-    1.60      13.9 +/-    1.60  0.040 / 0.040
G23     317.4          47.0                9.3 +/-    1.28      12.2 +/-    1.28  0.040 / 0.040
G26     73.5           53.9                8.6 +/-    0.40      10.4 +/-    0.40  0.040 / 0.050
G31     50.8           23.8                8.4 +/-    0.90      16.8 +/-    0.90  0.060 / 0.050