PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/07-23:57:50
G07     21.4           68.7                7.9 +/-    0.78       8.5 +/-    0.78  0.110 / 0.200
G08     62.0           48.3                7.1 +/-    0.54       9.2 +/-    0.54  0.140 / 0.170
G09     180.6          48.2               11.0 +/-    1.02      14.2 +/-    1.02  0.050 / 0.040
G11     130.7          28.1                7.7 +/-    1.23      14.0 +/-    1.23  0.060 / 0.040
G23     159.9          16.4                8.0 +/-    1.27      19.3 +/-    1.27  0.150 / 0.290
G27     39.4           14.6                4.4 +/-    2.63      10.9 +/-    2.63  0.170 / 0.310
G28     262.5          47.5                8.0 +/-    4.14      10.4 +/-    4.14  0.190 / 0.230
G30     327.0          55.8                6.4 +/-    0.67       7.6 +/-    0.67  0.170 / 0.320