PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/15-21:58:00
G01     251.3          35.3               12.5 +/-    1.77      19.6 +/-    1.77  0.030 / 0.040
G03     315.9          43.5                7.5 +/-    0.84      10.3 +/-    0.84  0.040 / 0.040
G11     237.9          12.9                9.4 +/-    3.01      24.6 +/-    3.01  0.060 / 0.370
G14     60.3           40.7                6.9 +/-    1.59      10.0 +/-    1.59  0.070 / 0.360
G22     305.3          65.3                8.3 +/-    0.67       9.1 +/-    0.67  0.080 / 0.070
G23     286.2          18.6               10.2 +/-    1.71      23.3 +/-    1.71  0.060 / 0.080
G25     39.8           10.1                6.6 +/-    1.91      18.3 +/-    1.91  0.060 / 0.100
G26     138.7          37.2               10.8 +/-    0.73      16.5 +/-    0.73  0.080 / 0.100
G31     40.4           60.7                8.5 +/-    0.44       9.5 +/-    0.44  0.120 / 0.120
G32     76.9           23.7                7.9 +/-    1.77      15.8 +/-    1.77  0.070 / 0.180