PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/02-17:58:10
G07     2.8            66.3                9.7 +/-    0.46      10.5 +/-    0.46  0.030 / 0.060
G08     73.8           52.6               11.0 +/-    0.89      13.5 +/-    0.89  0.030 / 0.060
G09     181.3          55.3               12.9 +/-    1.29      15.3 +/-    1.29  0.060 / 0.180
G11     135.3          23.9               12.3 +/-    1.18      24.6 +/-    1.18  0.100 / 0.210
G23     157.7          19.5               10.7 +/-    1.55      23.9 +/-    1.55  0.030 / 0.050
G27     42.5           20.4                7.9 +/-    1.03      17.3 +/-    1.03  0.040 / 0.040
G28     253.7          42.6               12.7 +/-    0.77      17.7 +/-    0.77  0.060 / 0.100
G30     317.2          48.1                8.7 +/-    0.71      11.3 +/-    0.71  0.050 / 0.090