PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/18-21:57:40
G01     223.4          14.5                8.0 +/-    3.00      20.1 +/-    3.00  0.270 / 0.450
G03     277.2          69.4                9.4 +/-    0.81      10.0 +/-    0.81  0.230 / 0.210
G09     296.8          11.7                3.9 +/-   29.76      10.5 +/-   29.76  0.040 / 0.040
G14     90.0           21.2                7.3 +/-    1.22      15.6 +/-    1.22  0.050 / 0.030
G16     144.4          48.0                9.8 +/-    0.93      12.6 +/-    0.93  0.050 / 0.050
G22     209.9          67.4               10.2 +/-    0.61      10.9 +/-    0.61  0.040 / 0.050
G23     308.9          38.2                8.8 +/-    1.99      13.2 +/-    1.99  0.130 / 0.280
G26     94.6           55.5                9.3 +/-    0.48      11.0 +/-    0.48  0.160 / 0.310
G31     45.7           32.7                7.2 +/-    1.08      11.9 +/-    1.08  0.040 / 0.040