PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/21-20:28:10
G01     289.9          40.2                5.6 +/-    5.21       8.2 +/-    5.21  0.050 / 0.080
G03     312.2          17.8                8.3 +/-    2.00      19.3 +/-    2.00  0.040 / 0.110
G10     120.2          28.7                9.3 +/-    1.09      16.7 +/-    1.09  0.090 / 0.140
G11     265.3          26.0                9.0 +/-    2.01      17.2 +/-    2.01  0.080 / 0.160
G14     25.3           58.3                6.8 +/-    0.88       7.8 +/-    0.88  0.020 / 0.020
G22     313.8          38.5                7.0 +/-    1.44      10.4 +/-    1.44  0.020 / 0.010
G25     65.9           18.9                6.7 +/-    1.27      15.1 +/-    1.27  0.040 / 0.060
G26     157.5          13.0               12.8 +/-    2.70      33.4 +/-    2.70  0.040 / 0.040
G31     134.5          79.3                9.4 +/-    0.41       9.6 +/-    0.41  0.040 / 0.050
G32     51.1           42.2                5.9 +/-    1.63       8.3 +/-    1.63  0.060 / 0.040