PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-21:13:10
G01     81.4           33.2               13.1 +/-    0.70      21.6 +/-    0.70  0.030 / 0.040
G07     131.6          39.5               15.5 +/-    0.86      22.7 +/-    0.86  0.110 / 0.110
G11     62.3           37.5               12.9 +/-    1.52      19.6 +/-    1.52  0.120 / 0.120
G13     286.1          37.4               14.8 +/-    1.10      22.5 +/-    1.10  0.230 / 0.210
G15     309.8          13.0               11.5 +/-    2.33      30.1 +/-    2.33  0.290 / 0.250
G17     221.4          55.7              -18.1 +/-   10.01     -21.4 +/-   10.01  0.030 / 0.030
G18     57.1           22.2               11.1 +/-    3.10      23.2 +/-    3.10  0.030 / 0.040
G19     218.5          33.1               18.8 +/-    1.53      30.9 +/-    1.53  0.110 / 0.080
G28     4.3            60.9               13.1 +/-    0.80      14.8 +/-    0.80  0.090 / 0.070
G30     123.8          68.1               14.7 +/-    0.36      15.7 +/-    0.36  0.040 / 0.040