PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/16-05:58:20
G01     71.3           33.0                6.3 +/-    0.50      10.5 +/-    0.50  0.030 / 0.050
G07     137.1          30.9                8.5 +/-    1.22      14.5 +/-    1.22  0.030 / 0.060
G11     54.6           31.2                5.2 +/-    1.21       8.9 +/-    1.21  0.050 / 0.100
G13     276.6          37.1                9.3 +/-    0.90      14.2 +/-    0.90  0.040 / 0.100
G15     302.5          15.6                2.1 +/-    2.10       5.1 +/-    2.10  0.110 / 0.330
G17     233.4          69.6                8.3 +/-    1.14       8.8 +/-    1.14  0.110 / 0.350
G19     224.0          42.9               10.0 +/-    0.98      13.8 +/-    0.98  0.050 / 0.090
G28     20.1           59.1                6.0 +/-    0.38       6.8 +/-    0.38  0.040 / 0.080
G30     134.5          60.5               10.0 +/-    0.66      11.3 +/-    0.66  0.030 / 0.030