PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/30-22:58:00
G03     215.4          59.7                9.5 +/-    1.72      10.8 +/-    1.72  0.050 / 0.050
G07     255.5          14.1                8.2 +/-    2.69      20.9 +/-    2.69  0.050 / 0.050
G09     309.1          25.9                7.1 +/-    1.30      13.6 +/-    1.30  0.030 / 0.040
G16     108.5          65.2                9.2 +/-    0.62      10.0 +/-    0.62  0.030 / 0.050
G22     189.6          44.3                9.0 +/-    0.80      12.2 +/-    0.80  0.030 / 0.040
G23     328.0          57.8                8.3 +/-    0.87       9.7 +/-    0.87  0.040 / 0.030
G26     56.4           46.1                7.0 +/-    0.67       9.3 +/-    0.67  0.070 / 0.120
G27     134.5          9.7               -13.8 +/-   13.20     -38.8 +/-   13.20  0.070 / 0.120
G31     57.8           12.8                6.1 +/-    1.66      15.9 +/-    1.66  0.120 / 0.130