PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-17:28:00
G02     201.1          20.9               11.7 +/-    2.48      25.1 +/-    2.48  0.140 / 0.230
G06     167.6          57.1               11.9 +/-    0.54      13.9 +/-    0.54  0.110 / 0.230
G13     225.9          12.0               11.5 +/-    2.31      30.7 +/-    2.31  0.130 / 0.130
G17     23.2           58.8               10.4 +/-    0.70      11.9 +/-    0.70  0.080 / 0.100
G19     318.5          70.3               10.3 +/-    0.64      10.9 +/-    0.64  0.160 / 0.460
G24     308.3          31.7               11.0 +/-    2.01      18.6 +/-    2.01  0.240 / 0.600
G28     89.7           38.9               11.4 +/-    1.00      16.8 +/-    1.00  0.040 / 0.030
G30     157.6          13.8                9.6 +/-    3.16      24.6 +/-    3.16  0.030 / 0.030