PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/31-20:42:50
G01     256.5          37.5               10.2 +/-    1.99      15.4 +/-    1.99  0.040 / 0.040
G03     316.4          40.1                8.7 +/-    1.64      12.6 +/-    1.64  0.050 / 0.040
G11     241.9          15.2               11.6 +/-    1.62      28.7 +/-    1.62  0.110 / 0.130
G14     55.5           43.6                8.9 +/-    1.10      12.3 +/-    1.10  0.170 / 0.140
G22     309.4          61.7                9.9 +/-    1.00      11.1 +/-    1.00  0.020 / 0.040
G23     283.2          16.4                5.9 +/-   12.32      14.2 +/-   12.32  0.020 / 0.040
G25     43.1           12.6                8.2 +/-    3.53      21.7 +/-    3.53  0.060 / 0.080
G26     141.4          33.8               12.9 +/-    0.91      21.0 +/-    0.91  0.070 / 0.100
G31     42.2           64.3                8.7 +/-    0.39       9.5 +/-    0.39  0.050 / 0.090
G32     73.4           26.0                8.1 +/-    2.66      15.5 +/-    2.66  0.060 / 0.070