PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-05:57:50
G02     200.2          19.4                5.9 +/-    1.65      13.1 +/-    1.65  0.110 / 0.130
G06     173.4          50.9                9.0 +/-    0.58      11.2 +/-    0.58  0.080 / 0.080
G13     227.5          14.0                6.0 +/-    2.88      15.4 +/-    2.88  0.050 / 0.090
G17     24.2           58.6                5.1 +/-    0.91       5.9 +/-    0.91  0.050 / 0.070
G19     312.0          70.8                4.6 +/-    0.67       4.8 +/-    0.67  0.110 / 0.380
G24     308.3          32.3                4.1 +/-    1.94       6.9 +/-    1.94  0.320 / 0.640
G28     84.8           42.3                6.8 +/-    0.95       9.6 +/-    0.95  0.050 / 0.040
G30     157.4          16.8                8.3 +/-    1.14      19.9 +/-    1.14  0.040 / 0.040