PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/18-12:57:40
G01     79.6           33.2                4.9 +/-    0.75       8.1 +/-    0.75  0.040 / 0.040
G07     132.7          37.5                5.3 +/-    0.81       8.1 +/-    0.81  0.040 / 0.040
G11     58.6           34.4                3.7 +/-    1.25       5.9 +/-    1.25  0.050 / 0.080
G13     283.5          37.9                5.0 +/-    1.57       7.5 +/-    1.57  0.030 / 0.070
G15     311.7          11.2               -1.0 +/-   11.48      -2.7 +/-   11.48  0.070 / 0.120
G17     222.5          63.9                6.7 +/-    0.67       7.4 +/-    0.67  0.060 / 0.120
G18     54.7           21.0                2.8 +/-    3.18       6.1 +/-    3.18  0.090 / 0.240
G19     219.2          31.7                4.3 +/-    1.57       7.3 +/-    1.57  0.090 / 0.270
G28     5.6            60.8                6.0 +/-    0.74       6.8 +/-    0.74  0.050 / 0.130
G30     124.9          70.6                5.7 +/-    0.61       6.0 +/-    0.61  0.060 / 0.130