PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/27-00:12:30
G02     217.4          63.3               13.5 +/-    0.96      15.0 +/-    0.96  0.030 / 0.080
G06     53.5           72.6               10.9 +/-    0.72      11.4 +/-    0.72  0.030 / 0.080
G12     319.1          37.7               10.0 +/-    1.00      15.1 +/-    1.00  0.070 / 0.090
G17     56.4           34.7                9.6 +/-    0.57      15.3 +/-    0.57  0.070 / 0.090
G19     40.5           48.7               11.0 +/-    0.87      14.1 +/-    0.87  0.050 / 0.050
G24     263.0          41.1               12.9 +/-    1.14      18.4 +/-    1.14  0.040 / 0.040
G28     124.0          11.9               13.6 +/-    2.13      36.4 +/-    2.13  0.110 / 0.500