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               12.4 +/-    1.02      14.1 +/-    1.02  0.040 / 0.080
G06     52.3           71.0               10.4 +/-    0.40      10.9 +/-    0.40  0.040 / 0.070
G12     320.1          40.8                9.5 +/-    0.97      13.6 +/-    0.97  0.100 / 0.420
G17     58.8           31.4                9.8 +/-    0.89      16.6 +/-    0.89  0.080 / 0.500
G19     38.4           50.1                9.2 +/-    0.62      11.6 +/-    0.62  0.060 / 0.090
G24     261.3          41.3               13.3 +/-    1.24      19.0 +/-    1.24  0.070 / 0.090
G28     123.8          12.3               13.4 +/-    3.06      35.5 +/-    3.06  0.040 / 0.060