PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-20:58:00
G01     81.2           33.2               11.9 +/-    0.90      19.6 +/-    0.90  0.090 / 0.240
G07     131.8          39.3               14.7 +/-    0.94      21.7 +/-    0.94  0.120 / 0.170
G11     62.1           37.3               12.6 +/-    0.96      19.1 +/-    0.96  0.260 / 0.330
G13     285.8          37.4               12.7 +/-    0.43      19.2 +/-    0.43  0.090 / 0.250
G15     309.7          13.0               10.7 +/-    2.55      27.8 +/-    2.55  0.050 / 0.080
G17     221.6          56.3               14.5 +/-    1.43      17.0 +/-    1.43  0.060 / 0.090
G18     56.9           22.1               10.9 +/-    3.32      22.7 +/-    3.32  0.040 / 0.050
G19     218.6          33.2               15.0 +/-    1.94      24.7 +/-    1.94  0.050 / 0.070
G28     4.6            60.9               12.3 +/-    0.82      13.8 +/-    0.82  0.030 / 0.030
G30     124.0          68.1               14.5 +/-    0.52      15.5 +/-    0.52  0.030 / 0.030