PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/15-16:58:00
G07     355.2          64.7               13.7 +/-    0.86      15.0 +/-    0.86  0.030 / 0.040
G08     78.9           53.1               14.5 +/-    0.67      17.7 +/-    0.67  0.040 / 0.050
G09     182.0          59.0               16.5 +/-    0.84      18.9 +/-    0.84  0.080 / 0.070
G11     137.6          21.6               12.3 +/-    2.04      26.1 +/-    2.04  0.080 / 0.060
G23     157.4          23.6               13.2 +/-    1.44      26.6 +/-    1.44  0.050 / 0.040
G27     44.5           23.1                9.9 +/-    2.54      20.3 +/-    2.54  0.040 / 0.040
G28     249.7          40.0               15.8 +/-    1.94      23.0 +/-    1.94  0.070 / 0.150
G30     313.7          45.1               13.2 +/-    0.93      17.7 +/-    0.93  0.050 / 0.100