PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/23-23:43:00
G01     116.8          19.6               11.7 +/-    0.91      26.0 +/-    0.91  0.040 / 0.080
G07     86.5           65.4                9.8 +/-    0.24      10.7 +/-    0.24  0.050 / 0.090
G08     44.7           31.5                7.9 +/-    0.53      13.4 +/-    0.53  0.040 / 0.060
G09     177.4          24.3               10.4 +/-    1.62      20.6 +/-    1.62  0.040 / 0.060
G11     107.3          40.9               11.7 +/-    1.17      16.7 +/-    1.17  0.060 / 0.120
G13     316.8          20.8                6.1 +/-    2.75      13.1 +/-    2.75  0.060 / 0.130
G17     203.0          25.6               11.2 +/-    1.20      21.6 +/-    1.20  0.120 / 0.190
G28     298.9          58.7                8.8 +/-    0.63      10.1 +/-    0.63  0.120 / 0.180
G30     4.2            73.1               11.0 +/-    0.72      11.5 +/-    0.72  0.030 / 0.050