PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/03/18-15:28:00
G01     256.6          37.5                9.6 +/-    2.19      14.6 +/-    2.19  0.040 / 0.070
G03     316.6          44.1                7.8 +/-    1.20      10.7 +/-    1.20  0.040 / 0.070
G11     243.6          15.0                9.8 +/-    1.02      24.4 +/-    1.02  0.030 / 0.030
G14     53.5           45.5                8.4 +/-    0.90      11.2 +/-    0.90  0.030 / 0.030
G22     308.2          65.2                8.8 +/-    0.63       9.6 +/-    0.63  0.030 / 0.040
G23     284.4          18.9                5.6 +/-    8.09      12.6 +/-    8.09  0.030 / 0.030
G25     43.7           13.0                6.5 +/-    2.68      16.9 +/-    2.68  0.090 / 0.150
G31     42.5           61.5                8.3 +/-    0.52       9.3 +/-    0.52  0.110 / 0.130
G32     74.2           24.6                8.8 +/-    1.26      17.3 +/-    1.26  0.050 / 0.070