PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-21:42:50
G01     103.1          27.6               15.1 +/-    0.86      27.8 +/-    0.86  0.080 / 0.190
G07     112.4          55.7               14.5 +/-    0.33      17.2 +/-    0.33  0.080 / 0.150
G08     42.2           21.1               10.4 +/-    0.91      22.3 +/-    0.91  0.040 / 0.120
G09     174.7          10.9               19.1 +/-    3.00      52.1 +/-    3.00  0.030 / 0.110
G11     86.3           43.5               13.7 +/-    0.50      18.8 +/-    0.50  0.060 / 0.060
G13     306.7          30.5               11.5 +/-    1.53      19.8 +/-    1.53  0.060 / 0.050
G17     208.7          38.1               16.7 +/-    2.12      25.0 +/-    2.12  0.030 / 0.050
G18     76.7           24.8               14.2 +/-    0.95      27.9 +/-    0.95  0.020 / 0.060
G28     326.9          61.6               11.5 +/-    0.96      12.9 +/-    0.96  0.030 / 0.080
G30     58.1           78.8               12.3 +/-    1.03      12.5 +/-    1.03  0.040 / 0.070