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                6.3 +/-    0.64       7.2 +/-    0.64  0.050 / 0.080
G06     52.5           71.7                6.9 +/-    0.48       7.2 +/-    0.48  0.050 / 0.080
G12     319.9          40.6                5.3 +/-    1.39       7.6 +/-    1.39  0.070 / 0.090
G17     60.0           29.5                4.6 +/-    1.69       8.1 +/-    1.69  0.060 / 0.070
G19     36.6           51.2                4.5 +/-    0.25       5.6 +/-    0.25  0.040 / 0.030
G24     258.9          41.5                6.6 +/-    1.95       9.3 +/-    1.95  0.030 / 0.030
G28     123.7          13.0                6.7 +/-    2.02      17.6 +/-    2.02  0.040 / 0.050