PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/05-18:57:40
G01     114.6          21.1               23.3 +/-    1.17      49.9 +/-    1.17  0.130 / 0.170
G07     91.9           64.1               20.9 +/-    0.68      22.9 +/-    0.68  0.110 / 0.190
G08     43.9           29.8               15.3 +/-    1.00      26.8 +/-    1.00  0.100 / 0.110
G09     176.5          21.3               20.9 +/-    1.65      44.5 +/-    1.65  0.070 / 0.160
G11     101.7          41.7               22.5 +/-    0.61      31.8 +/-    0.61  0.050 / 0.120
G13     315.1          23.1               15.7 +/-    1.28      32.1 +/-    1.28  0.070 / 0.100
G17     204.2          26.3               22.1 +/-    1.49      41.9 +/-    1.49  0.040 / 0.060
G18     89.4           22.6               18.5 +/-    1.26      38.2 +/-    1.26  0.050 / 0.060
G28     302.9          59.3               21.0 +/-    1.05      24.0 +/-    1.05  0.030 / 0.030
G30     1.2            73.5               20.7 +/-    1.01      21.5 +/-    1.01  0.030 / 0.040