PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/28-08:57:50
G01     115.5          20.4                5.5 +/-    1.16      12.0 +/-    1.16  0.030 / 0.030
G07     91.5           63.6                6.2 +/-    0.86       6.9 +/-    0.86  0.030 / 0.030
G08     43.0           26.0                3.5 +/-    2.80       6.6 +/-    2.80  0.030 / 0.020
G09     172.9          17.3                5.8 +/-    2.02      13.8 +/-    2.02  0.040 / 0.020
G11     99.5           41.3                6.8 +/-    0.88       9.7 +/-    0.88  0.080 / 0.220
G13     315.4          22.9                2.8 +/-    1.25       5.8 +/-    1.25  0.140 / 0.190
G17     202.0          30.4                6.8 +/-    0.99      11.8 +/-    0.99  0.110 / 0.170
G18     88.3           22.0                5.3 +/-    1.00      11.2 +/-    1.00  0.090 / 0.170
G28     298.5          58.3                5.7 +/-    1.17       6.6 +/-    1.17  0.120 / 0.160
G30     350.1          70.9                5.7 +/-    0.46       6.0 +/-    0.46  0.120 / 0.180