PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/17-19:27:40
G07     36.6           69.8               14.3 +/-    0.79      15.1 +/-    0.79  0.050 / 0.030
G08     57.3           46.7               12.9 +/-    1.04      16.9 +/-    1.04  0.040 / 0.040
G09     179.4          41.8               15.2 +/-    0.69      21.5 +/-    0.69  0.120 / 0.290
G11     125.1          32.0               13.9 +/-    1.26      23.4 +/-    1.26  0.150 / 0.340
G18     108.6          14.2               13.1 +/-    1.84      33.3 +/-    1.84  0.030 / 0.010
G27     37.8           10.5                9.7 +/-    1.47      26.8 +/-    1.47  0.030 / 0.010
G28     269.7          50.6               15.2 +/-    2.42      19.1 +/-    2.42  0.030 / 0.010
G30     330.1          58.2               13.2 +/-    0.72      15.2 +/-    0.72  0.030 / 0.010