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               12.9 +/-    1.05      14.2 +/-    1.05  0.030 / 0.030
G06     53.5           72.6               10.1 +/-    0.26      10.5 +/-    0.26  0.040 / 0.030
G12     319.1          37.7                9.1 +/-    1.67      13.8 +/-    1.67  0.030 / 0.060
G17     56.4           34.7                9.7 +/-    1.61      15.4 +/-    1.61  0.040 / 0.070
G19     40.5           48.7               10.2 +/-    2.20      13.1 +/-    2.20  0.050 / 0.080
G24     263.0          41.1               13.3 +/-    2.55      19.0 +/-    2.55  0.060 / 0.090
G28     124.0          11.9               14.3 +/-    2.05      38.3 +/-    2.05  0.190 / 0.340