PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/02-19:43:10
G07     346.5          62.4               13.1 +/-    0.60      14.6 +/-    0.60  0.050 / 0.040
G08     90.5           54.6               15.8 +/-    0.69      18.9 +/-    0.69  0.040 / 0.040
G09     185.2          64.8               14.5 +/-    0.73      15.9 +/-    0.73  0.050 / 0.110
G11     141.8          18.2               14.9 +/-    2.56      34.2 +/-    2.56  0.070 / 0.140
G23     156.8          29.1               15.7 +/-    0.65      28.0 +/-    0.65  0.040 / 0.040
G27     47.3           26.0               10.6 +/-    1.50      20.2 +/-    1.50  0.030 / 0.040
G28     245.3          36.9               15.7 +/-    1.51      24.0 +/-    1.51  0.060 / 0.070
G30     310.9          43.2               11.5 +/-    1.05      15.9 +/-    1.05  0.090 / 0.080