PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-15:28:00
G03     200.7          45.9               13.8 +/-    1.65      18.3 +/-    1.65  0.030 / 0.050
G07     265.6          21.4               11.6 +/-    1.62      24.6 +/-    1.62  0.030 / 0.030
G09     315.1          36.8               11.0 +/-    1.14      16.9 +/-    1.14  0.080 / 0.300
G16     66.7           60.4               11.7 +/-    0.69      13.3 +/-    0.69  0.090 / 0.260
G22     181.1          26.7               12.8 +/-    1.57      24.0 +/-    1.57  0.040 / 0.050
G23     353.9          73.2               11.2 +/-    0.64      11.6 +/-    0.64  0.040 / 0.040
G26     46.1           32.7                9.8 +/-    0.57      16.2 +/-    0.57  0.050 / 0.070
G27     125.4          18.2               11.0 +/-    2.19      25.3 +/-    2.19  0.050 / 0.090