PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/18-22:28:10
G02     212.4          56.2               16.6 +/-    1.23      19.6 +/-    1.23  0.060 / 0.050
G06     71.2           77.1               13.4 +/-    0.47      13.7 +/-    0.47  0.050 / 0.060
G12     317.2          32.6               11.8 +/-    1.03      19.6 +/-    1.03  0.040 / 0.060
G17     51.7           37.8               11.2 +/-    0.66      16.9 +/-    0.66  0.030 / 0.060
G19     32.0           53.3               12.9 +/-    0.55      15.6 +/-    0.55  0.050 / 0.080
G24     271.3          42.4               14.4 +/-    1.07      20.2 +/-    1.07  0.060 / 0.100
G28     119.6          16.8               15.3 +/-    2.61      36.4 +/-    2.61  0.050 / 0.090