PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/20-16:27:50
G01     227.6          18.1               10.3 +/-    1.70      23.7 +/-    1.70  0.080 / 0.160
G03     282.1          70.5                9.1 +/-    0.61       9.6 +/-    0.61  0.080 / 0.160
G14     84.2           27.3                7.4 +/-    1.55      13.8 +/-    1.55  0.040 / 0.060
G16     147.6          43.9               12.4 +/-    0.69      17.0 +/-    0.69  0.030 / 0.080
G22     210.3          70.7                9.2 +/-    0.36       9.7 +/-    0.36  0.040 / 0.110
G23     307.9          38.7                6.6 +/-    1.33       9.8 +/-    1.33  0.070 / 0.090
G26     98.0           53.6               12.4 +/-    0.34      15.0 +/-    0.34  0.040 / 0.040
G31     45.0           32.2                7.0 +/-    1.62      11.7 +/-    1.62  0.040 / 0.040