PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/17-13:27:40
G02     205.1          32.0                5.5 +/-    2.52       9.2 +/-    2.52  0.120 / 0.100
G03     57.0           9.4                 5.5 +/-    1.36      15.6 +/-    1.36  0.090 / 0.060
G06     153.9          71.2                6.2 +/-    0.48       6.5 +/-    0.48  0.080 / 0.120
G12     309.2          19.3                3.0 +/-    1.73       6.6 +/-    1.73  0.070 / 0.200
G17     38.6           46.9                4.9 +/-    1.35       6.5 +/-    1.35  0.110 / 0.220
G19     352.4          66.3                4.2 +/-    0.38       4.6 +/-    0.38  0.140 / 0.250
G24     293.9          40.5                2.1 +/-    8.65       3.0 +/-    8.65  0.030 / 0.020
G28     103.4          31.0                5.9 +/-    1.06      10.1 +/-    1.06  0.030 / 0.020