PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/27-06:28:10
G01     41.2           16.4                1.8 +/-    2.04       4.3 +/-    2.04  0.050 / 0.060
G06     179.0          35.1                4.6 +/-    1.70       7.2 +/-    1.70  0.040 / 0.060
G13     238.9          22.1                4.8 +/-    1.25      10.1 +/-    1.25  0.180 / 0.190
G15     270.2          12.5                3.8 +/-    1.59      10.1 +/-    1.59  0.190 / 0.220
G17     3.0            70.1                3.2 +/-    0.18       3.3 +/-    0.18  0.030 / 0.020
G19     280.4          70.0                2.1 +/-    0.50       2.3 +/-    0.50  0.030 / 0.020
G24     317.1          18.2                1.8 +/-    1.79       4.3 +/-    1.79  0.230 / 0.150
G28     72.4           46.3                3.5 +/-    1.22       4.6 +/-    1.22  0.160 / 0.150
G30     153.9          25.6                5.6 +/-    1.87      10.9 +/-    1.87  0.050 / 0.080