PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/28-01:58:00
G07     38.0           69.0                6.4 +/-    0.48       6.8 +/-    0.48  0.030 / 0.040
G08     55.1           42.6                5.8 +/-    0.58       8.1 +/-    0.58  0.030 / 0.040
G09     177.5          42.6               10.2 +/-    0.62      14.3 +/-    0.62  0.040 / 0.080
G11     123.7          31.5               10.1 +/-    1.38      17.1 +/-    1.38  0.050 / 0.080
G17     198.1          10.1               -6.8 +/-   11.52     -19.0 +/-   11.52  0.160 / 0.390
G18     106.7          13.0                8.8 +/-    3.05      22.8 +/-    3.05  0.150 / 0.380
G23     161.4          16.5                9.2 +/-    3.50      21.9 +/-    3.50  0.120 / 0.270
G27     39.6           15.6                4.3 +/-    0.85      10.5 +/-    0.85  0.130 / 0.290
G28     263.3          46.7                6.0 +/-    1.43       8.0 +/-    1.43  0.040 / 0.060
G30     323.6          53.6                5.4 +/-    0.96       6.6 +/-    0.96  0.050 / 0.050