PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-18:57:50
G01     220.3          10.9               14.2 +/-    3.01      38.9 +/-    3.01  0.070 / 0.140
G03     250.3          71.0               11.9 +/-    1.21      12.5 +/-    1.21  0.070 / 0.110
G09     299.1          12.3               11.6 +/-    2.30      30.7 +/-    2.30  0.050 / 0.050
G14     93.8           19.9               11.9 +/-    1.13      26.2 +/-    1.13  0.050 / 0.050
G16     138.5          53.4               15.7 +/-    0.42      19.0 +/-    0.42  0.040 / 0.060
G22     198.5          61.7               16.2 +/-    0.64      18.2 +/-    0.64  0.040 / 0.060
G23     315.0          45.0               11.4 +/-    1.22      15.3 +/-    1.22  0.080 / 0.210
G26     79.9           53.8               11.6 +/-    0.80      14.0 +/-    0.80  0.080 / 0.210
G31     49.1           24.3               10.6 +/-    0.72      21.1 +/-    0.72  0.180 / 0.340