PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/14-13:27:40
G02     73.5           20.5                4.4 +/-    2.65       9.5 +/-    2.65  0.030 / 0.050
G05     46.0           46.4                3.4 +/-    0.63       4.5 +/-    0.63  0.040 / 0.030
G12     182.8          17.5                4.8 +/-    0.91      11.3 +/-    0.91  0.040 / 0.030
G13     115.6          25.9                5.8 +/-    2.12      11.1 +/-    2.12  0.040 / 0.030
G15     153.3          26.1                7.2 +/-    1.12      13.7 +/-    1.12  0.170 / 0.230
G18     223.6          16.8                3.4 +/-    3.71       8.1 +/-    3.71  0.120 / 0.240
G20     225.6          75.0                5.3 +/-    0.71       5.5 +/-    0.71  0.060 / 0.140
G21     287.2          31.8                5.0 +/-    2.18       8.5 +/-    2.18  0.060 / 0.150
G25     218.6          38.4                5.4 +/-    1.72       8.1 +/-    1.72  0.160 / 0.150
G29     348.5          74.8                4.1 +/-    0.61       4.2 +/-    0.61  0.090 / 0.180