PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/08-22:57:50
G07     330.3          56.8                9.1 +/-    0.42      10.7 +/-    0.42  0.080 / 0.170
G08     104.7          51.7               11.4 +/-    0.57      14.0 +/-    0.57  0.080 / 0.150
G09     198.4          76.1                9.2 +/-    0.77       9.5 +/-    0.77  0.070 / 0.060
G11     148.7          11.3               12.0 +/-    3.63      32.5 +/-    3.63  0.070 / 0.080
G23     154.6          42.3               10.8 +/-    0.88      15.2 +/-    0.88  0.040 / 0.050
G27     55.9           31.8                7.9 +/-    1.61      13.3 +/-    1.61  0.040 / 0.040
G28     236.4          29.0                8.5 +/-    1.55      15.3 +/-    1.55  0.030 / 0.040
G30     303.2          37.6                7.7 +/-    0.88      11.6 +/-    0.88  0.040 / 0.040