PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/27-13:42:50
G02     218.6          58.4                6.2 +/-    1.51       7.1 +/-    1.51  0.060 / 0.060
G06     52.5           71.7                5.0 +/-    0.43       5.2 +/-    0.43  0.060 / 0.060
G12     319.9          40.6                4.0 +/-    1.14       5.7 +/-    1.14  0.050 / 0.060
G17     60.0           29.5                5.5 +/-    2.62       9.7 +/-    2.62  0.040 / 0.050
G19     36.6           51.2                4.7 +/-    2.01       5.9 +/-    2.01  0.030 / 0.030
G24     258.9          41.5                6.3 +/-    2.37       8.9 +/-    2.37  0.030 / 0.020
G28     123.7          13.0                6.0 +/-    2.50      15.5 +/-    2.50  0.040 / 0.040