PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/28-20:27:40
G03     187.2          15.7               14.8 +/-    4.29      36.3 +/-    4.29  0.060 / 0.070
G07     293.6          39.1               11.3 +/-    1.68      16.7 +/-    1.68  0.060 / 0.060
G08     141.8          30.0               20.2 +/-    1.45      35.3 +/-    1.45  0.090 / 0.120
G09     319.2          65.3               12.2 +/-    0.44      13.3 +/-    0.44  0.070 / 0.090
G16     42.1           35.8               11.3 +/-    1.03      17.7 +/-    1.03  0.080 / 0.090
G23     126.8          74.2               13.4 +/-    0.85      13.9 +/-    0.85  0.080 / 0.080
G27     94.1           35.0               15.8 +/-    1.24      25.1 +/-    1.24  0.030 / 0.040
G30     277.8          17.8               12.6 +/-    2.03      29.3 +/-    2.03  0.030 / 0.030