PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/08-00:12:50
G02     200.6          27.4               15.6 +/-    1.33      28.9 +/-    1.33  0.040 / 0.040
G06     168.5          59.6               14.3 +/-    0.60      16.3 +/-    0.60  0.030 / 0.040
G17     22.1           59.0               12.3 +/-    0.82      14.1 +/-    0.82  0.090 / 0.090
G19     337.7          69.6               12.3 +/-    0.47      13.0 +/-    0.47  0.060 / 0.100
G24     306.4          33.0               11.0 +/-    1.93      18.1 +/-    1.93  0.040 / 0.100
G28     94.1           36.2               13.4 +/-    1.36      20.7 +/-    1.36  0.060 / 0.080