PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/21-03:13:00
G01     115.8          20.0                8.1 +/-    1.37      17.9 +/-    1.37  0.030 / 0.040
G07     92.6           62.4                5.3 +/-    1.25       5.9 +/-    1.25  0.030 / 0.040
G08     43.0           25.8                3.4 +/-    0.62       6.5 +/-    0.62  0.060 / 0.170
G09     175.1          20.9                5.5 +/-    1.56      11.8 +/-    1.56  0.060 / 0.210
G11     99.4           41.3                6.5 +/-    0.61       9.2 +/-    0.61  0.040 / 0.070
G13     315.6          22.7                1.2 +/-    2.71       2.6 +/-    2.71  0.040 / 0.050
G17     201.4          30.8                6.6 +/-    2.31      11.4 +/-    2.31  0.120 / 0.220
G18     86.6           21.6                5.9 +/-    2.46      12.5 +/-    2.46  0.120 / 0.220
G28     295.7          57.4                4.0 +/-    0.49       4.7 +/-    0.49  0.030 / 0.040
G30     350.0          70.8                4.6 +/-    0.57       4.8 +/-    0.57  0.040 / 0.040