PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/17-21:27:50
G01     235.0          25.3                9.3 +/-    1.80      18.1 +/-    1.80  0.080 / 0.160
G03     307.4          58.9                6.8 +/-    0.99       7.9 +/-    0.99  0.090 / 0.220
G14     76.4           30.6                8.0 +/-    0.59      13.8 +/-    0.59  0.100 / 0.150
G16     155.6          32.8                9.8 +/-    1.28      16.2 +/-    1.28  0.060 / 0.140
G18     207.3          13.7                8.4 +/-    2.16      21.5 +/-    2.16  0.080 / 0.180
G22     259.7          75.3                7.8 +/-    0.73       8.0 +/-    0.73  0.070 / 0.190
G23     297.7          27.7                5.9 +/-    1.87      10.9 +/-    1.87  0.070 / 0.120
G26     121.2          49.5                8.9 +/-    0.73      11.3 +/-    0.73  0.070 / 0.120
G31     40.7           46.5                6.4 +/-    0.33       8.4 +/-    0.33  0.030 / 0.040
G32     90.0           13.8                8.7 +/-    1.49      22.2 +/-    1.49  0.040 / 0.030