PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-15:27:50
G03     205.8          53.3               12.6 +/-    0.63      15.3 +/-    0.63  0.040 / 0.030
G07     259.6          16.9               11.6 +/-    2.65      27.5 +/-    2.65  0.040 / 0.030
G09     311.9          30.4               10.0 +/-    0.99      17.4 +/-    0.99  0.030 / 0.040
G16     83.5           63.6               11.5 +/-    0.62      12.7 +/-    0.62  0.020 / 0.040
G22     183.1          34.3               11.0 +/-    0.67      17.6 +/-    0.67  0.170 / 0.190
G23     340.7          66.8               11.0 +/-    0.58      11.9 +/-    0.58  0.130 / 0.160
G26     50.0           38.9               11.1 +/-    1.28      16.5 +/-    1.28  0.090 / 0.100
G27     131.1          13.2               11.4 +/-    2.22      29.6 +/-    2.22  0.070 / 0.100