PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/29-19:42:50
G01     297.4          38.2               11.1 +/-    1.67      16.6 +/-    1.67  0.050 / 0.080
G03     310.0          13.3               10.8 +/-    2.34      27.9 +/-    2.34  0.040 / 0.070
G10     115.2          33.4               10.9 +/-    0.62      17.9 +/-    0.62  0.050 / 0.080
G11     272.2          27.3               10.6 +/-    0.69      19.7 +/-    0.69  0.080 / 0.070
G14     15.4           61.9                9.8 +/-    0.78      10.9 +/-    0.78  0.020 / 0.020
G22     312.5          33.5                9.4 +/-    1.09      15.4 +/-    1.09  0.020 / 0.030
G25     72.3           18.6                9.5 +/-    2.23      21.5 +/-    2.23  0.080 / 0.150
G31     155.1          74.4               11.4 +/-    0.66      11.8 +/-    0.66  0.100 / 0.140
G32     45.5           46.1                8.6 +/-    0.55      11.4 +/-    0.55  0.040 / 0.040