PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-06:27:40
G02     203.4          34.9                7.2 +/-    1.84      11.4 +/-    1.84  0.060 / 0.080
G06     164.0          68.0                8.7 +/-    1.11       9.3 +/-    1.11  0.070 / 0.080
G12     307.2          14.7                1.8 +/-    1.94       4.6 +/-    1.94  0.070 / 0.110
G17     38.7           46.6                6.0 +/-    0.36       8.0 +/-    0.36  0.060 / 0.110
G19     357.1          65.9                5.8 +/-    0.84       6.3 +/-    0.84  0.040 / 0.040
G24     293.5          41.1                5.2 +/-    0.55       7.5 +/-    0.55  0.030 / 0.030
G28     101.6          33.0               10.7 +/-    0.98      17.7 +/-    0.98  0.100 / 0.240