PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-01:57:50
G07     7.5            66.6                3.8 +/-    0.60       4.1 +/-    0.60  0.040 / 0.040
G08     68.7           48.9                3.8 +/-    0.68       4.9 +/-    0.68  0.030 / 0.040
G09     178.6          54.7                6.5 +/-    1.49       7.7 +/-    1.49  0.080 / 0.120
G11     133.2          24.3                7.1 +/-    1.21      14.1 +/-    1.21  0.080 / 0.120
G23     160.2          27.7                5.9 +/-    0.36      10.9 +/-    0.36  0.070 / 0.110
G27     44.8           24.0                2.1 +/-    0.67       4.2 +/-    0.67  0.060 / 0.110
G28     250.5          39.3                3.7 +/-    0.76       5.5 +/-    0.76  0.050 / 0.070
G30     313.8          44.9                2.4 +/-    1.11       3.3 +/-    1.11  0.050 / 0.070