PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-20:58:00
G01     257.2          37.7                8.2 +/-    2.22      12.3 +/-    2.22  0.050 / 0.040
G03     316.5          39.4                6.7 +/-    1.10       9.8 +/-    1.10  0.030 / 0.060
G11     242.3          15.5               10.1 +/-    1.39      24.9 +/-    1.39  0.170 / 0.180
G14     54.9           43.9                7.3 +/-    1.33      10.0 +/-    1.33  0.140 / 0.180
G22     309.8          61.1                6.6 +/-    1.12       7.4 +/-    1.12  0.020 / 0.030
G23     282.7          16.0                1.7 +/-    9.90       4.0 +/-    9.90  0.030 / 0.030
G25     43.5           12.8                6.9 +/-    2.69      18.2 +/-    2.69  0.050 / 0.080
G26     142.1          33.2               12.8 +/-    0.80      20.9 +/-    0.80  0.080 / 0.100
G31     42.6           65.2                6.6 +/-    0.44       7.2 +/-    0.44  0.050 / 0.080
G32     72.9           26.5                6.5 +/-    1.32      12.3 +/-    1.32  0.040 / 0.070