PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/18-16:57:30
G03     189.4          20.2               11.4 +/-    1.64      25.0 +/-    1.64  0.100 / 0.160
G07     289.1          36.5               11.5 +/-    1.62      17.8 +/-    1.62  0.110 / 0.160
G08     146.0          25.8               15.2 +/-    2.14      29.2 +/-    2.14  0.020 / 0.030
G09     320.4          61.3               10.4 +/-    1.08      11.7 +/-    1.08  0.020 / 0.030
G16     42.8           38.4               10.0 +/-    1.06      14.9 +/-    1.06  0.060 / 0.080
G23     117.9          75.5               11.5 +/-    0.58      11.8 +/-    0.58  0.040 / 0.080
G26     43.4           10.6                9.6 +/-    2.84      26.5 +/-    2.84  0.120 / 0.310
G27     99.8           33.5               12.0 +/-    0.86      19.6 +/-    0.86  0.160 / 0.280
G30     273.7          13.5                8.1 +/-   22.17      20.9 +/-   22.17  0.050 / 0.100