PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/15-19:28:10
G07     26.9           69.3               12.7 +/-    0.68      13.5 +/-    0.68  0.040 / 0.020
G08     61.3           48.9               12.0 +/-    0.74      15.4 +/-    0.74  0.070 / 0.020
G09     179.8          45.3               14.2 +/-    0.98      19.0 +/-    0.98  0.180 / 0.270
G11     128.1          29.9               17.4 +/-    0.78      30.4 +/-    0.78  0.190 / 0.330
G18     111.4          12.5               13.9 +/-    2.15      36.7 +/-    2.15  0.040 / 0.010
G23     158.9          11.5               15.8 +/-    2.06      42.6 +/-    2.06  0.040 / 0.020
G27     38.7           13.1                8.9 +/-    2.27      23.1 +/-    2.27  0.130 / 0.370
G28     265.2          48.7               13.4 +/-    4.09      17.1 +/-    4.09  0.120 / 0.330
G30     326.7          55.7               11.3 +/-    0.62      13.3 +/-    0.62  0.040 / 0.020