PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-06:12:40
G01     66.0           32.1                6.3 +/-    0.91      10.6 +/-    0.91  0.030 / 0.040
G07     139.7          26.7                8.7 +/-    1.15      16.3 +/-    1.15  0.040 / 0.040
G11     51.5           28.0                4.6 +/-    1.66       8.4 +/-    1.66  0.140 / 0.250
G13     270.8          36.4                8.9 +/-    0.69      13.8 +/-    0.69  0.090 / 0.230
G15     298.4          16.4                6.0 +/-    3.21      14.4 +/-    3.21  0.040 / 0.070
G17     243.8          73.5                9.2 +/-    0.43       9.6 +/-    0.43  0.040 / 0.080
G19     227.8          47.2               10.2 +/-    2.27      13.3 +/-    2.27  0.080 / 0.160
G28     28.1           57.9                7.4 +/-    2.10       8.6 +/-    2.10  0.150 / 0.140
G30     138.9          56.0                9.8 +/-    0.73      11.6 +/-    0.73  0.030 / 0.020