PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-18:58:00
G07     315.9          50.7               12.3 +/-    1.39      15.4 +/-    1.39  0.050 / 0.080
G08     124.7          45.8               16.4 +/-    0.83      21.9 +/-    0.83  0.040 / 0.090
G09     256.2          82.7               11.7 +/-    0.94      11.7 +/-    0.94  0.130 / 0.370
G16     43.5           16.4               10.4 +/-    0.76      25.0 +/-    0.76  0.170 / 0.450
G23     148.9          51.1               14.9 +/-    1.07      18.5 +/-    1.07  0.040 / 0.060
G27     67.9           36.0               12.7 +/-    0.58      19.8 +/-    0.58  0.040 / 0.060
G28     228.9          20.0               15.5 +/-    1.56      34.0 +/-    1.56  0.210 / 0.300
G30     293.5          29.2               11.4 +/-    2.54      20.3 +/-    2.54  0.110 / 0.250