PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/12-18:57:40
G02     218.0          60.6               12.1 +/-    1.14      13.7 +/-    1.14  0.070 / 0.070
G06     52.3           71.0               10.6 +/-    0.52      11.1 +/-    0.52  0.070 / 0.070
G12     320.1          40.8                9.5 +/-    0.94      13.6 +/-    0.94  0.040 / 0.030
G17     58.8           31.4                8.5 +/-    1.55      14.5 +/-    1.55  0.040 / 0.040
G19     38.4           50.1                9.0 +/-    2.06      11.3 +/-    2.06  0.050 / 0.070
G24     261.3          41.3               12.0 +/-    3.85      17.1 +/-    3.85  0.030 / 0.060
G28     123.8          12.3               13.8 +/-    3.71      36.6 +/-    3.71  0.050 / 0.040