PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/13-22:57:40
G03     225.6          64.6                6.9 +/-    0.49       7.6 +/-    0.49  0.130 / 0.390
G07     252.2          12.8                7.2 +/-    3.87      18.9 +/-    3.87  0.100 / 0.340
G09     307.4          24.7                7.1 +/-    1.23      14.0 +/-    1.23  0.050 / 0.060
G14     104.3          10.1                7.8 +/-    1.88      21.6 +/-    1.88  0.040 / 0.060
G16     116.3          62.3                9.7 +/-    0.46      10.8 +/-    0.46  0.120 / 0.570
G22     192.7          49.6                8.9 +/-    0.98      11.3 +/-    0.98  0.120 / 0.540
G23     322.0          51.9                7.8 +/-    1.13       9.6 +/-    1.13  0.040 / 0.040
G26     63.4           50.3                5.5 +/-    0.69       6.9 +/-    0.69  0.040 / 0.040
G31     54.3           18.4                4.9 +/-    0.66      11.1 +/-    0.66  0.060 / 0.060