PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/02-12:28:10
G07     307.4          46.6                4.0 +/-    1.46       5.3 +/-    1.46  0.070 / 0.050
G08     127.4          41.2                6.5 +/-    1.04       9.3 +/-    1.04  0.040 / 0.050
G09     298.0          80.8                6.1 +/-    0.45       6.2 +/-    0.45  0.200 / 0.220
G16     42.2           21.5                5.5 +/-    2.74      11.6 +/-    2.74  0.070 / 0.230
G23     144.3          61.0                6.2 +/-    0.36       6.9 +/-    0.36  0.050 / 0.070
G27     78.5           37.3                5.7 +/-    0.99       8.7 +/-    0.99  0.060 / 0.060
G28     224.4          13.0                2.0 +/-    2.70       5.3 +/-    2.70  0.040 / 0.040
G30     286.1          22.0                6.1 +/-    2.07      12.8 +/-    2.07  0.050 / 0.030