PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/13-06:12:40
G01     70.4           32.8                3.3 +/-    1.00       5.5 +/-    1.00  0.030 / 0.040
G07     137.6          30.2                6.7 +/-    0.55      11.7 +/-    0.55  0.030 / 0.040
G11     54.0           30.6                3.6 +/-    1.26       6.1 +/-    1.26  0.070 / 0.240
G13     275.6          37.0                5.1 +/-    3.00       7.8 +/-    3.00  0.080 / 0.200
G15     301.8          15.8                1.0 +/-    1.08       2.4 +/-    1.08  0.030 / 0.030
G17     235.0          70.4                7.0 +/-    0.41       7.4 +/-    0.41  0.030 / 0.020
G19     224.6          43.7                7.6 +/-    2.48      10.4 +/-    2.48  0.060 / 0.080
G28     21.5           58.9                2.7 +/-    2.22       3.1 +/-    2.22  0.030 / 0.060
G30     135.3          59.8                7.6 +/-    0.51       8.6 +/-    0.51  0.050 / 0.080