PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/01-19:43:00
G02     217.9          61.0               12.1 +/-    0.94      13.6 +/-    0.94  0.080 / 0.090
G06     52.4           71.2                9.6 +/-    0.41      10.1 +/-    0.41  0.060 / 0.090
G12     319.9          40.3                9.9 +/-    0.99      14.3 +/-    0.99  0.050 / 0.100
G17     58.5           31.9                9.2 +/-    0.91      15.4 +/-    0.91  0.050 / 0.070
G19     38.7           49.9                9.1 +/-    0.66      11.5 +/-    0.66  0.050 / 0.060
G24     261.6          41.3               10.9 +/-    1.71      15.6 +/-    1.71  0.050 / 0.050
G28     123.9          12.3                9.2 +/-    4.11      24.5 +/-    4.11  0.090 / 0.420