PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/22-21:58:00
G01     51.0           26.1               12.6 +/-    0.82      24.0 +/-    0.82  0.100 / 0.300
G06     177.8          24.3               18.2 +/-    1.34      36.2 +/-    1.34  0.100 / 0.380
G07     146.1          13.9               19.8 +/-    3.65      50.7 +/-    3.65  0.080 / 0.110
G11     45.4           17.3                9.2 +/-    1.12      21.7 +/-    1.12  0.060 / 0.110
G13     251.9          30.9               15.7 +/-    0.84      26.9 +/-    0.84  0.030 / 0.060
G15     284.6          15.9               12.7 +/-    1.73      31.0 +/-    1.73  0.040 / 0.060
G17     287.4          76.8               14.7 +/-    0.65      15.1 +/-    0.65  0.160 / 0.330
G19     244.8          58.2               14.4 +/-    0.89      16.6 +/-    0.89  0.150 / 0.350
G28     51.5           53.1               12.3 +/-    0.47      15.0 +/-    0.47  0.080 / 0.240
G30     148.8          40.8               15.5 +/-    0.78      22.3 +/-    0.78  0.090 / 0.230