PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/09-04:57:40
G01     89.1           31.9                7.9 +/-    0.97      13.3 +/-    0.97  0.030 / 0.020
G07     126.6          42.5                9.7 +/-    0.89      13.5 +/-    0.89  0.030 / 0.020
G11     65.7           38.5                6.7 +/-    0.80      10.0 +/-    0.80  0.120 / 0.170
G13     293.1          36.8               10.1 +/-    1.78      15.5 +/-    1.78  0.160 / 0.120
G17     214.2          57.4               11.7 +/-    0.83      13.6 +/-    0.83  0.050 / 0.050
G19     214.9          25.7                8.6 +/-    1.14      16.6 +/-    1.14  0.050 / 0.040
G28     346.3          61.8                8.1 +/-    0.65       9.1 +/-    0.65  0.040 / 0.060
G30     104.5          77.0                9.2 +/-    0.55       9.4 +/-    0.55  0.060 / 0.070