PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/07-13:43:00
G01     79.6           33.2                6.5 +/-    1.22      10.7 +/-    1.22  0.030 / 0.020
G07     132.7          37.6                8.7 +/-    0.91      13.2 +/-    0.91  0.030 / 0.030
G11     58.7           34.6                7.1 +/-    2.11      11.3 +/-    2.11  0.060 / 0.070
G13     283.6          37.9                9.4 +/-    2.06      14.2 +/-    2.06  0.060 / 0.060
G15     311.4          11.5                3.9 +/-    4.58      10.4 +/-    4.58  0.060 / 0.090
G17     222.6          63.3               10.4 +/-    1.17      11.5 +/-    1.17  0.050 / 0.090
G18     54.8           21.1                7.0 +/-    4.46      15.1 +/-    4.46  0.060 / 0.100
G19     219.3          31.9                8.7 +/-    1.83      14.7 +/-    1.83  0.060 / 0.080
G28     5.7            60.8                6.7 +/-    1.38       7.5 +/-    1.38  0.210 / 0.350
G30     125.0          70.3                8.7 +/-    1.03       9.2 +/-    1.03  0.120 / 0.330