PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-20:58:10
G02     202.6          32.8               19.6 +/-    1.17      32.5 +/-    1.17  0.090 / 0.300
G06     159.8          67.8               15.7 +/-    1.11      16.8 +/-    1.11  0.140 / 0.360
G12     306.8          14.7               11.9 +/-    3.82      29.8 +/-    3.82  0.090 / 0.110
G17     31.5           52.8               13.5 +/-    0.72      16.5 +/-    0.72  0.070 / 0.100
G19     352.2          67.0               12.8 +/-    0.62      13.8 +/-    0.62  0.070 / 0.120
G24     299.7          37.4               15.3 +/-    1.15      23.2 +/-    1.15  0.060 / 0.120
G28     100.7          32.3               13.9 +/-    0.91      23.3 +/-    0.91  0.030 / 0.050