PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/15-23:57:50
G01     123.5          14.6               12.1 +/-    2.12      30.4 +/-    2.12  0.030 / 0.060
G07     65.5           68.7                5.8 +/-    0.97       6.1 +/-    0.97  0.040 / 0.060
G08     48.5           37.9                6.8 +/-    0.75      10.2 +/-    0.75  0.130 / 0.180
G09     178.5          32.4               10.7 +/-    1.65      17.9 +/-    1.65  0.100 / 0.260
G11     116.6          37.2               10.1 +/-    1.59      15.4 +/-    1.59  0.040 / 0.050
G13     320.1          14.5                6.0 +/-    2.46      15.2 +/-    2.46  0.040 / 0.060
G17     201.2          18.1               10.9 +/-    1.54      25.2 +/-    1.54  0.150 / 0.330
G28     284.6          55.6                7.7 +/-    0.72       9.1 +/-    0.72  0.140 / 0.270
G30     347.9          67.6                4.2 +/-    0.52       4.5 +/-    0.52  0.060 / 0.120