PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/04-00:27:50
G02     200.4          26.8               15.0 +/-    1.76      28.2 +/-    1.76  0.180 / 0.110
G06     169.1          58.8               13.2 +/-    0.61      15.2 +/-    0.61  0.040 / 0.080
G17     21.7           59.3               11.6 +/-    0.77      13.3 +/-    0.77  0.110 / 0.040
G19     336.2          69.8               11.3 +/-    0.49      11.9 +/-    0.49  0.040 / 0.040
G24     306.9          32.5               10.1 +/-    2.30      16.7 +/-    2.30  0.090 / 0.110
G28     93.5           36.6               11.6 +/-    1.27      17.8 +/-    1.27  0.110 / 0.120