PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/11-22:28:00
G07     319.4          52.3                7.4 +/-    0.43       9.1 +/-    0.43  0.080 / 0.200
G08     117.5          47.8                9.9 +/-    0.44      12.8 +/-    0.44  0.110 / 0.170
G09     236.8          82.2                8.5 +/-    0.30       8.5 +/-    0.30  0.030 / 0.040
G16     43.9           15.9                6.8 +/-    2.62      16.5 +/-    2.62  0.040 / 0.040
G23     151.0          50.9                9.8 +/-    0.36      12.2 +/-    0.36  0.240 / 0.420
G27     64.6           35.1                8.5 +/-    0.91      13.4 +/-    0.91  0.280 / 0.370
G28     230.5          22.3                9.3 +/-    2.79      19.4 +/-    2.79  0.050 / 0.070
G30     296.5          32.5                7.4 +/-    2.79      12.3 +/-    2.79  0.060 / 0.070