PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/24-21:27:50
G01     248.0          33.7               12.3 +/-    1.37      20.0 +/-    1.37  0.060 / 0.030
G03     315.2          46.8               10.7 +/-    1.00      14.0 +/-    1.00  0.030 / 0.030
G11     235.7          11.3               12.4 +/-    6.11      33.7 +/-    6.11  0.030 / 0.040
G14     63.3           39.1               11.4 +/-    1.24      16.8 +/-    1.24  0.030 / 0.040
G16     164.2          19.2                7.2 +/-   16.84      16.1 +/-   16.84  0.110 / 0.220
G22     300.9          68.2               10.9 +/-    0.61      11.7 +/-    0.61  0.180 / 0.220
G23     288.6          20.7               10.8 +/-    3.06      23.3 +/-    3.06  0.040 / 0.070
G26     135.4          39.9               14.0 +/-    0.67      20.4 +/-    0.67  0.050 / 0.080
G31     40.0           57.1               10.2 +/-    0.49      11.9 +/-    0.49  0.130 / 0.160
G32     79.6           21.6                9.9 +/-    1.36      20.9 +/-    1.36  0.090 / 0.140