PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/29-02:12:50
G01     126.0          12.2               -3.9 +/-   36.06     -10.3 +/-   36.06  0.040 / 0.040
G07     63.2           67.9                5.1 +/-    0.43       5.4 +/-    0.43  0.030 / 0.040
G08     48.3           36.1                1.8 +/-    0.74       2.8 +/-    0.74  0.120 / 0.360
G09     176.7          33.5                6.8 +/-    1.65      11.0 +/-    1.65  0.130 / 0.350
G11     114.8          36.4                7.6 +/-    1.01      11.7 +/-    1.01  0.110 / 0.270
G13     320.6          13.1               -0.4 +/-   10.45      -1.0 +/-   10.45  0.090 / 0.300
G17     198.9          18.4                6.2 +/-    1.21      14.3 +/-    1.21  0.050 / 0.060
G18     98.8           17.1                8.5 +/-    1.09      20.1 +/-    1.09  0.040 / 0.070
G28     275.2          51.7                5.4 +/-    1.01       6.7 +/-    1.01  0.040 / 0.040
G30     332.5          60.6                2.9 +/-    1.01       3.2 +/-    1.01  0.040 / 0.040