PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-20:57:50
G01     296.6          38.4                9.8 +/-    0.63      14.6 +/-    0.63  0.050 / 0.110
G03     310.2          13.1                9.0 +/-    2.16      23.4 +/-    2.16  0.070 / 0.130
G10     115.8          33.0               11.7 +/-    0.87      19.3 +/-    0.87  0.070 / 0.090
G11     270.9          27.4                9.3 +/-    1.63      17.2 +/-    1.63  0.060 / 0.080
G14     17.2           61.3                7.2 +/-    0.72       8.1 +/-    0.72  0.040 / 0.030
G22     312.6          33.6                7.1 +/-    1.87      11.6 +/-    1.87  0.030 / 0.030
G25     71.3           18.6                8.9 +/-    0.99      20.3 +/-    0.99  0.060 / 0.140
G31     156.7          74.6               10.4 +/-    1.07      10.7 +/-    1.07  0.050 / 0.130
G32     45.7           46.1                6.8 +/-    0.36       9.0 +/-    0.36  0.050 / 0.060