PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/11-15:28:00
G01     82.7           33.0                9.1 +/-    0.98      15.0 +/-    0.98  0.020 / 0.040
G07     130.8          40.1                9.8 +/-    0.89      14.3 +/-    0.89  0.030 / 0.040
G11     61.6           36.6                8.0 +/-    0.64      12.3 +/-    0.64  0.060 / 0.090
G13     286.9          37.5               10.1 +/-    1.54      15.3 +/-    1.54  0.060 / 0.100
G15     312.6          11.1                7.5 +/-    2.16      20.4 +/-    2.16  0.070 / 0.100
G17     220.0          59.4               12.3 +/-    0.64      14.0 +/-    0.64  0.070 / 0.100
G18     57.4           22.1                6.3 +/-    0.76      13.1 +/-    0.76  0.050 / 0.080
G19     217.9          30.2               13.2 +/-    2.00      23.0 +/-    2.00  0.050 / 0.070
G28     1.2            61.1                9.8 +/-    0.85      11.0 +/-    0.85  0.040 / 0.060
G30     120.4          71.8               11.0 +/-    0.91      11.5 +/-    0.91  0.040 / 0.060