PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/29-19:57:30
G01     225.8          16.4               10.8 +/-    1.45      26.0 +/-    1.45  0.030 / 0.040
G03     280.2          69.7               10.2 +/-    0.46      10.8 +/-    0.46  0.030 / 0.030
G14     87.2           24.4               10.5 +/-    1.80      20.8 +/-    1.80  0.090 / 0.210
G16     147.9          45.4               13.4 +/-    1.01      17.9 +/-    1.01  0.120 / 0.180
G22     212.2          69.7               10.3 +/-    0.64      10.9 +/-    0.64  0.180 / 0.200
G23     308.4          38.5                9.4 +/-    1.17      14.0 +/-    1.17  0.300 / 0.260
G26     95.8           54.5               12.2 +/-    0.88      14.6 +/-    0.88  0.040 / 0.060
G31     45.5           31.5                8.1 +/-    1.43      13.8 +/-    1.43  0.040 / 0.060