PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/20-00:57:40
G02     226.6          70.9               10.0 +/-    0.49      10.5 +/-    0.49  0.030 / 0.030
G05     173.5          11.1                2.3 +/-   30.86       6.2 +/-   30.86  0.020 / 0.040
G06     44.1           65.6                8.8 +/-    0.70       9.6 +/-    0.70  0.040 / 0.050
G12     320.8          44.6               10.4 +/-    0.63      14.1 +/-    0.63  0.040 / 0.050
G17     62.5           30.7                9.5 +/-    0.75      16.4 +/-    0.75  0.150 / 0.240
G19     49.0           43.8                9.7 +/-    1.25      13.3 +/-    1.25  0.180 / 0.370
G24     253.6          38.4               12.4 +/-    1.84      18.5 +/-    1.84  0.050 / 0.130