PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/31-20:27:40
G07     23.9           69.0               12.2 +/-    1.22      13.0 +/-    1.22  0.040 / 0.050
G08     62.9           49.7               12.1 +/-    0.80      15.3 +/-    0.80  0.040 / 0.050
G09     180.2          46.7               13.7 +/-    1.49      18.0 +/-    1.49  0.090 / 0.160
G11     129.5          29.1               14.8 +/-    0.65      26.4 +/-    0.65  0.210 / 0.210
G18     112.3          11.9               13.1 +/-    2.23      34.9 +/-    2.23  0.100 / 0.300
G23     159.2          13.2               14.7 +/-    1.67      38.2 +/-    1.67  0.160 / 0.300
G27     39.0           13.9                9.5 +/-    3.12      24.4 +/-    3.12  0.030 / 0.030
G28     263.9          48.1               14.0 +/-    3.65      18.1 +/-    3.65  0.030 / 0.030
G30     326.3          55.3               12.1 +/-    0.54      14.3 +/-    0.54  0.090 / 0.180