PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/19-20:27:40
G01     295.2          38.9                6.8 +/-    3.38      10.1 +/-    3.38  0.090 / 0.080
G03     310.7          14.4                6.9 +/-    2.27      17.5 +/-    2.27  0.070 / 0.090
G10     116.8          32.0                8.8 +/-    1.00      14.8 +/-    1.00  0.080 / 0.110
G11     269.8          27.1                8.7 +/-    1.66      16.3 +/-    1.66  0.080 / 0.150
G14     18.9           60.7                7.8 +/-    1.00       8.8 +/-    1.00  0.030 / 0.020
G22     312.9          34.8                7.1 +/-    1.36      11.4 +/-    1.36  0.020 / 0.030
G25     70.2           18.7                8.5 +/-    1.95      19.3 +/-    1.95  0.040 / 0.040
G31     151.9          76.0               10.0 +/-    0.78      10.3 +/-    0.78  0.050 / 0.050
G32     47.1           45.0                7.9 +/-    0.42      10.6 +/-    0.42  0.040 / 0.040