PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/25-22:43:10
G03     251.4          69.7               11.9 +/-    0.34      12.6 +/-    0.34  0.050 / 0.030
G09     300.6          14.4                9.1 +/-    2.17      23.1 +/-    2.17  0.040 / 0.030
G14     96.3           17.2               10.6 +/-    1.11      24.9 +/-    1.11  0.040 / 0.040
G16     139.8          54.6               15.1 +/-    0.60      18.1 +/-    0.60  0.040 / 0.050
G22     199.5          60.6               12.2 +/-    0.61      13.8 +/-    0.61  0.110 / 0.170
G23     315.5          45.1                9.6 +/-    0.58      13.0 +/-    0.58  0.080 / 0.100
G26     78.6           54.4               10.6 +/-    0.82      12.7 +/-    0.82  0.120 / 0.240
G31     49.5           24.4                8.4 +/-    2.04      16.6 +/-    2.04  0.080 / 0.250