PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/28-16:13:00
G01     37.6           9.7                 7.7 +/-    3.36      21.6 +/-    3.36  0.120 / 0.200
G02     200.6          14.5               11.4 +/-    2.62      28.6 +/-    2.62  0.120 / 0.210
G06     170.2          50.4               13.6 +/-    0.63      17.0 +/-    0.63  0.080 / 0.150
G13     230.4          16.1               12.5 +/-    2.75      30.3 +/-    2.75  0.080 / 0.110
G17     16.8           63.2               11.2 +/-    0.58      12.4 +/-    0.58  0.080 / 0.300
G19     297.0          69.9               10.9 +/-    1.00      11.6 +/-    1.00  0.090 / 0.350
G24     312.1          27.4                9.5 +/-    1.56      17.5 +/-    1.56  0.230 / 0.310
G28     82.5           42.4               11.5 +/-    1.46      16.0 +/-    1.46  0.150 / 0.300
G30     156.9          20.0               10.1 +/-    2.18      22.2 +/-    2.18  0.040 / 0.050