PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/01-16:57:40
G07     315.2          50.3                9.5 +/-    1.03      11.9 +/-    1.03  0.050 / 0.070
G08     123.5          45.6               12.8 +/-    1.00      17.1 +/-    1.00  0.040 / 0.060
G09     257.9          82.9                8.9 +/-    0.48       9.0 +/-    0.48  0.040 / 0.070
G16     43.4           16.3                7.0 +/-    2.06      16.9 +/-    2.06  0.030 / 0.070
G23     148.1          50.0               12.1 +/-    1.02      15.3 +/-    1.02  0.050 / 0.070
G27     68.9           36.3                9.6 +/-    0.53      14.8 +/-    0.53  0.050 / 0.050
G28     228.5          19.3                8.7 +/-    2.86      19.3 +/-    2.86  0.130 / 0.350
G30     292.4          27.9                7.9 +/-    2.13      14.5 +/-    2.13  0.170 / 0.420