PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/22-01:43:10
G07     353.5          64.1                2.7 +/-    0.77       2.9 +/-    0.77  0.030 / 0.050
G08     78.7           50.9                4.3 +/-    0.57       5.3 +/-    0.57  0.030 / 0.050
G09     180.1          61.9                6.8 +/-    1.29       7.5 +/-    1.29  0.080 / 0.140
G11     137.9          20.1                6.1 +/-    1.42      13.5 +/-    1.42  0.080 / 0.110
G23     159.0          34.3                6.5 +/-    1.02      10.4 +/-    1.02  0.050 / 0.120
G27     49.1           28.4                1.6 +/-    1.07       3.0 +/-    1.07  0.060 / 0.090
G28     244.2          34.5                5.0 +/-    2.12       7.9 +/-    2.12  0.060 / 0.080
G30     308.5          40.3                2.5 +/-    0.96       3.7 +/-    0.96  0.060 / 0.070