PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-08:12:30
G02     218.8          62.7                4.9 +/-    1.11       5.4 +/-    1.11  0.060 / 0.080
G06     53.3           73.9                3.9 +/-    0.48       4.0 +/-    0.48  0.060 / 0.060
G12     319.0          37.9                1.7 +/-    1.27       2.5 +/-    1.27  0.040 / 0.020
G17     61.1           28.2                4.6 +/-    3.12       8.3 +/-    3.12  0.030 / 0.020
G19     40.0           49.0                3.0 +/-    1.74       3.8 +/-    1.74  0.060 / 0.070
G24     255.6          41.4                5.5 +/-    1.88       7.9 +/-    1.88  0.060 / 0.060
G28     123.8          13.5                5.9 +/-    1.98      15.2 +/-    1.98  0.130 / 0.280