PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/22-11:27:50
G01     116.2          19.9                4.3 +/-    2.07       9.5 +/-    2.07  0.030 / 0.020
G07     88.7           64.6                4.6 +/-    0.79       5.0 +/-    0.79  0.030 / 0.020
G08     43.2           26.6                1.6 +/-    2.01       3.1 +/-    2.01  0.040 / 0.030
G09     174.7          20.5                2.3 +/-    1.73       5.0 +/-    1.73  0.030 / 0.030
G11     100.6          41.0                5.2 +/-    1.30       7.5 +/-    1.30  0.090 / 0.150
G13     315.9          22.2                1.2 +/-    1.22       2.6 +/-    1.22  0.090 / 0.130
G17     201.8          29.4                4.2 +/-    1.18       7.5 +/-    1.18  0.080 / 0.170
G18     90.1           21.9                3.4 +/-    0.75       7.2 +/-    0.75  0.080 / 0.170
G28     298.2          58.4                2.9 +/-    0.95       3.4 +/-    0.95  0.130 / 0.190
G30     348.4          70.1                4.0 +/-    0.84       4.2 +/-    0.84  0.160 / 0.190