PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-00:42:50
G02     217.9          64.1               12.0 +/-    1.23      13.1 +/-    1.23  0.030 / 0.020
G06     52.5           72.3                9.5 +/-    0.30       9.9 +/-    0.30  0.030 / 0.020
G12     319.3          38.1                9.0 +/-    1.35      13.5 +/-    1.35  0.040 / 0.060
G17     56.6           34.9               10.7 +/-    1.46      17.0 +/-    1.46  0.040 / 0.060
G19     41.4           48.2               10.1 +/-    1.63      13.0 +/-    1.63  0.180 / 0.390
G24     262.3          40.9               12.6 +/-    3.41      18.1 +/-    3.41  0.330 / 0.420
G28     124.4          11.4               13.1 +/-    1.75      35.4 +/-    1.75  0.050 / 0.080